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					   NEW METALS NETWORK BUILDS ON THE SUCCESS OF MITE-RN
    MITE-RN, a Research Network involving over 45                  A NEW METALS RESEARCH NETWORK
scientists from Canadian universities, government                      A MITE-RN research workshop, sponsored by the
departments and industry, was launched in 1999 to                  Mining Association of Canada, was held in May 2003
address gaps in our understanding of the sources, path-            in Kingston, Ontario. Thirty participants from academia,
ways, fates and effects of metals in the environment.              industry, and government sectors met to review the
Now in the fifth and final year of its mandate, MITE-RN            progress of MITE-RN, and to identify priorities and
is emphasizing the integration of the results from its             knowledge gaps related to risk assessment for metals
various research projects and the communication of                 in the environment, and their impact on human health.
these results both to its industrial partners and to the               One of the outcomes of these deliberations was the
appropriate environmental regulators.                              development of an outline for an initial preliminary
                                                                   application to NSERC to fund a new national metals
REGULATORY IMPACT OF MITE-RN                                       research program that would address the link between
   The US EPA has developed a Metals Action Plan that              metals in the environment, human exposure and adverse
recommended the development of a Metals Framework                  health effects. This preliminary application, with additional
patterned after the Agency's Ecological Risk Assessment            potential partners, was recently approved by NSERC, and
Framework. Three issue papers have been prepared and               a full application was prepared for submission to NSERC
submitted for review by US EPA.                                    for consideration.
                                                                       The workshop report may be seen at: www.mite-rn.org
TRAINING
                                                                   /files/Kingston_Workshop_Report_May2003.pdf
   MITE-RN continues to train the next cadre of envi-
ronmental scientists. Since its inception in March 1999,
MITE-RN has supported 95 Ph.D. student years, 93 M.Sc.
student years, and 23 Post Doctoral Fellow years.


 in this issue
 NEW METALS NETWORK BUILDS
 ON THE SUCCESS OF MITE-RN                            1
 SOURCES RESEARCH DOMAIN
     Method for Analysis of Mercury Species
     Associated with Atmospheric Particulate Matter   2
 PROCESSES RESEARCH DOMAIN
     Fate of Metals in Forested Catchments            3
 IMPACTS RESEARCH DOMAIN
     Wild Yellow Perch Growth:
     Many Sides to a (Metal) Coin                     4
 ECOLOGICAL RISK ASSESSMENT                           6
 GOVERNMENT PROJECTS
     Federal Government Research Contributions
     to the Network                                    8
 ANNOUNCEMENTS                                        10


                             M E TA L S I N T H E E N V I R O N M E N T R E S E A R C H N E T W O R K
                                                    w w w. m i t e - r n . o r g
                                       SOURCES RESEARCH DOMAIN



METHOD FOR ANALYSIS OF MERCURY SPECIES ASSOCIATED WITH
           ATMOSPHERIC PARTICULATE MATTER

                                                                    THERMAL RELEASE OF MERCURY VAPOUR



C
          hemical speciation of airborne                 FIG. 1     FROM DIFFERENT MERCURY COMPOUNDS
          particulate mercury is crucial
          for understanding the cycling,
                                                                                                                          Element
          transportation and deposition                 3500
of mercury in the natural environment.                                                                                    HgCl2
Such information is also important for                  3000                                                              HgS
understanding the bioavailability of this
                                                                                                                          HgO
trace element and, hence, the toxicity                  2500
of mercury present in the particulate
matter occurring in the atmosphere.                     2000
                                            Intensity




Even though particulate mercury gener-
ally constitutes only a small part of the               1500
total airborne mercury, recent studies
have shown the important role of par-                   1000
ticulate mercury in determining both
the wet and dry deposition flux of this                  500
toxic element.
    A novel method has been developed                      0
for chemical analysis of mercury species                       0   100        200   300        400       500     600        700      800   900
associated with airborne particulate                                                         Temperature, ˚C
matter and suspended particles in rain
waters. This method uses thermal des-
orption for separating mercury species                              MERCURY SPECIES IN THE SAMPLES
                                                         FIG. 2     OF PARTICULATE MATTER
and ICP-MS for mercury identification
and quantification. Coal fly-ash spiked
                                                        6000
with different mercury compounds (e.g.,                              Airborne particulate matter from
Hg0, HgCl2, HgO, and HgS) was used for                               Toronto
qualitative calibration. It can be seen                 5000         Airborne particulate from the Arctic
from Fig. 1 that using a linear tempera-
                                                                     Suspended particles in rainwater
ture program of 50ºC min-1, different
                                                        4000         Airborne particulate matter from an
mercury compounds could clearly be
                                                                     industrial area
separated. A standard reference mate-
                                              CPS




rial with a certified value of mercury                  3000
concentration was used to evaluate the
method. The results from 9 replicate
                                                        2000
analyses of the SRM yielded an average
mercury concentration of 0.155 ±0.025
mg kg-1, which is in agreement with the                 1000
certified value of 0.141±0.019 mg kg-1.

                                                           0
                  continued on page 9                      0.00      100.00         200.00           300.00      400.00           500.00    600.00
                                                                                               Temperature, ˚C



                                                           2
                                                MITE-RN NEWS, WINTER 2004
                                       PROCESSES RESEARCH DOMAIN



                  FATE OF METALS IN FORESTED CATCHMENTS

            group of researchers, led by Dr. Peter Dillon        trial vegetation is negligible in the PC1 catchment since



A           and Dr. Shaun Watmough, is in its third year
            of a project that focuses on understanding
            fundamental processes dictating the fate of
metals within a forested catchment. While the study is
based within a catchment that is not impacted by local
                                                                 the forest biomass is not increasing, although contribu-
                                                                 tions to the soil from biomass have been calculated
                                                                 from litterfall. A dated sediment core from Plastic Lake
                                                                 along with hydrology and chemistry data will provide
                                                                 estimates of transport to the lake from the surrounding
point sources, the findings will provide a valuable point        catchment.
of comparison for studies based at contaminated sites in              A Sphagnum-conifer swamp that filters headwater
Sudbury and other locations that receive point-source            runoff is also well instrumented and is used for under-
inputs. The primary objective of this study is to establish      standing the role of organic-rich environments on the
the size of compartments, or ‘pools’ of metals within            fate of metals. Since natural organic matter (NOM) plays
catchment compartments and the flux of metals between            an important role in the mobility of trace metals, filtered
compartments. In doing so, we will develop a better              (< 0.45 µm) and unfiltered fractions have been analysed
understanding of mechanisms controlling the magnitude            to examine the speciation of metals within the various
of these fluxes, and furthermore will develop and test           catchment compartments. Preliminary results indicate
models predicting the transport and fate of metals in the        that select metals have a greater affinity for particulate
environment.                                                     (> 0.45 µm) rather than dissolved fractions. For instance,
    This study is virtually unique in that it incorporates       higher levels of Al and Fe have been detected in the
a full spectrum of aquatic and terrestrial compartments          particulate fraction of precipitation and stream water.
(Fig. 1). Plastic Lake, located in Haliburton County, Ontario,   High sensitivity ICP-MS instrumentation has allowed for
has been well studied historically with an extensive envi-       low level detection of 27 metals, with particular emphasis
ronmental database available, and a wide range of exist-         placed on Cu, Cd, Pb, Ni and Zn.
ing instrumentation on site. Long-term records regarding
soil, stream and lake chemistry along with hydrological          PETER J. DILLON, SHAUN WATMOUGH, KATIA EPOVA,
and meterological data, span over the past 2-3 decades.          JOE FINDEIS, BRAD MILLS, HEATHER BROADBENT, and
This background information has allowed us to estimate           DOLLY KOTHAWALA (Trent University)
reliable trace metal mass balances. Net uptake by terres-



   FIG. 1




                                                          3
                                               MITE-RN NEWS, WINTER 2004
                                       IMPACTS RESEARCH DOMAIN
                                       SOURCES RESEARCH DOMAIN



WILD YELLOW PERCH
GROWTH: MANY SIDES
TO A (METAL) COIN



O
           ne of the most important
           considerations of ecological
           risk assessment (ERA) is to
           understand how contaminants,
such as metals, affect resident biota in
contaminated systems. Most research
investigating the effects of metals on
fish has been conducted using standard
fish species, such as rainbow trout or
fathead minnows, under tightly con-
trolled laboratory conditions that may
or may not reflect the realities of a
natural system. Unfortunately, neither
rainbow trout nor fathead minnows are
common in northern, industrially-con-
taminated lakes, such as those around
Sudbury, Ontario or Rouyn-Noranda,
Québec. However, yellow perch are
ubiquitous in northern Canadian lakes,
and are relatively abundant in lakes
contaminated by metals owing to their
impressive metal tolerance. The primary
objective of MITE-RN project C5 under
the direction of Drs. Patrice Couture               FIG. 1 TOP PANEL
(INRS-ETE) and Greg Pyle (Nipissing                       Yellow perch population age distributions and longevity in
University) is to understand the effects                  lakes forming two metal contamination gradients in
of industrial metal contamination on                      Sudbury and Rouyn-Noranda. Circles correspond to age
the health of wild yellow perch in                        classes for yellow perch captured from ranked lakes (ranks
Sudbury and Rouyn-Noranda lakes.                          represent increasing metal contamination). Circle size
     In this study, yellow perch were                     reflects the number of fish sampled at each age class.
collected in spring and summer from                 FIG. 1 BOTTOM PANEL
a total of ten lakes that formed two                      Length-at-age relationships for yellow perch sampled
metal-contamination gradients in                          from the same lakes as above (means ± SD). Points are
Sudbury and Rouyn-Noranda. Each                           artificially offset from one another within a particular age
sampling effort was designed to cap-                      class for the sake of clarity. Slopes of the regression
ture a minimum sample of 120 fish per                     curves represent instantaneous growth rates (r2 > 0.82)
lake per season that represented the                      and are significantly different from one another (p<0.01).
full size/age range of yellow perch in              FIG. 1 INSET
each population. Each fish was digi-                      Mean (± SEM) muscle cytochrome C oxidase (CCO) activity
tally photographed for morphometric                       from yellow perch captured from the Sudbury gradient
analysis and analyzed for length, weight,                 only. All data presented in Fig. 1 are from fish sampled in
age, gender, and condition.                               the spring.
                  continued on page 5


                                                       4
                                            MITE-RN NEWS, WINTER 2004
                                       IMPACTS RESEARCH DOMAIN


Representative fish from each age class were dissected
and tissues were measured for metabolic enzyme activi-
ties and metal accumulation.
    For this analysis, lakes were ranked according to
contamination status. Reference lakes in each gradient
were given a rank of 1 and the most contaminated lakes
were given a rank of 5, such that increasing rank corre-
sponds to increasing metal contamination. Therefore,
each rank represents two lakes; one from each of the         electron transport chain (ETC) activity, for muscle tissue,
Sudbury and Rouyn-Noranda gradients. Although the            as a function of contamination rank (Sudbury data
slopes of fork length to age relationships were used as      only). These data indicate that ETC activity increased as
surrogates for yellow perch growth, the same pattern         a function of contamination in ranks 1 to 4 fish. We
holds using fish weight.                                     speculate that metal accumulation within cells of certain
    A key finding from this work is that yellow perch        tissues (e.g., muscle) cause mitochondrial protein inhibi-
inhabiting metal contaminated lakes appear to ‘age’          tion (for example, citrate synthase) and membrane dam-
faster than fish living in reference lakes. The top panel    age (increasing membrane permeability), thus inhibiting
of Fig. 1 shows age distribution patterns and longevity      ATP production efficiency. This damage would in turn
in yellow perch populations by rank. In reference lakes,     cause an up-regulation of CCO activity in order to
there was a wider range of age classes relative to con-      maintain ATP production capacity, a response that
taminated lakes. Younger fish made up the largest pro-       would lead to increased reactive oxygen species produc-
portion of the population in contaminated lakes, and         tion. It is therefore interesting to note that this pattern
older fish were less well represented than in cleaner        of muscle CCO activity appears to be inversely related to
lakes. Moreover, longevity, represented by the oldest fish   longevity, since current theories on aging propose that
caught at each rank, was higher in reference lakes than      the cumulative effects of reactive oxygen damage lead
in contaminated lakes. However, fish from rank 5 lakes       to a decrease in longevity through a putative mecha-
had two more age classes than those from cleaner rank        nism analogous to premature aging. However, fish from
4 lakes. The absence of predators and interspecific com-     the most contaminated lakes (rank 5) showed a marked
petitors in rank 5 lakes may have positively influenced      decrease in CCO activity, presumably because some criti-
the survival of these yellow perch.                          cal contamination load threshold was exceeded. As CCO
    The bottom panel of Fig. 1 shows the growth rates of     activity fell in the most contaminated lake—possibly as
fish from each lake rank. Fish from contaminated lakes       the result of direct metal-induced inhibition—longevity
tended to start off smaller than fish from reference         increased.
lakes, but grew faster and died younger. The regression          These results demonstrate that there are complex rela-
lines in the bottom panel were all significant (p<0.0001;    tionships between environmental metal contamination,
r2>0.82 for each curve), and the slopes were statistically   ecology, and physiology. Given the differences in metal
different from one another (p<0.01). In this case as well,   sensitivity among species of fish and other aquatic organ-
decreased interspecific resource competition may favor       isms, metals will affect individual fish (direct toxic effects),
rapid growth in metal-tolerant fish from contaminated        their food, their competitors, and their predators (indirect
lakes.                                                       effects) in ways that will lead to both positive and nega-
    In previous studies, we showed that metal-contami-       tive consequences for the species under investigation. By
nated yellow perch demonstrated an impaired capacity         providing an understanding about how wild fish respond
for aerobic metabolism, as indicated by reduced muscle       to metal contamination in a natural environment, we can
citrate synthase activity, a mitochondrial matrix enzyme,    begin to develop effective, focused ERA and remediation
and respiration rates. Our MITE-RN funded research           strategies.
indicates that not all mitochondrial enzymes demon-          GREG PYLE (Dept. of Biology, Nipissing University, North Bay,
strate the same sensitivity to metal contamination. The      ON), JAMIE RAJOTTE (Dept. of Biology, University of Guelph,
inset in the bottom panel of Fig. 1 is cytochrome C          Guelph, ON), and PATRICE COUTURE (INRS ETE, Ste. Foy, QC)
oxidase (CCO) activity, an indicator of mitochondrial



                                                       5
                                            MITE-RN NEWS, WINTER 2004
                                 ECOLOGICAL RISK ASSESSMENT
                                  SOURCES RESEARCH DOMAIN




A
           s the end of year 5 of         Much of Volume 9 (June 2003)
           MITE-RN approaches,        of the international journal,
           it is clear that a great   Human and Ecological Risk
           deal of progress has       Assessment, was dedicated to
been made not only in the indi-       research from MITE-RN, including:
vidual research projects, but also    • Differentiating natural and
in developing and applying this         anthropogenic sources of metals
information to ecological risk          to the environment
assessment (ERA). A detailed tech-    • Modelling the effect of trace
nical summary is provided at            metal emissions on forest soils.
www.mite-rn.org/research/era/         • The role of vegetation in                   DR. PETER CHAPMAN
era.shtml, including the answers        sequestering and cycling metals
to three simple questions: 1. Why       in forests.
was this study done? 2. What          • Metal deposition chronologies in    Environment Canada (Hull), under
were the key findings? 3. Why           lakes.                              the supervision of Dr. Pat Doyle,
should regulators and non-scien-      • Metal sources for freshwater        is focusing on predicting metal
tists care about these findings?        invertebrates.                      accumulation in sensitive aquatic
The answers demonstrate the           • Chronic metal effects, gill-metal   invertebrates. His bioaccumulation
breadth and significance of MITE-       binding, and the Biotic Ligand      model, which integrates dietary
RN to ERA of metals and metalloids.     Model.                              and water uptake pathways, pre-
                                      • Effects of metal mixtures on        dicts Cd accumulation in Daphnia
                                        aquatic biota.                      magna under laboratory condi-
                                      • Differentiating direct and food-    tions, and has been extended to
                                        chain effects of metals on fish.    estimate a range of [Cd2+] over
                                      • Mercury impacts on freshwater       which no chronic effects are
                                        fish-eating wildlife and humans.    expected ([Cd2+] < 0.1 µg L-1). He is
                                          An overall Perspective article    presently refining the model by
                                      summarizing and synthesizing          considering the variability of dif-
                                      MITE-RN and other recent              ferent model parameters, and will
                                      research findings provides the        be testing it with other organisms
                                      current status of metals (and met-    and metals.
                                      alloids) ERA. An example of one           Dr. Collins Kamunde, working
                                      of the figures in the article is      at EVS Environmental Consultants
                                      shown; a copy of the whole article    (Vancouver) under the supervision
                                      can be downloaded from the            of Dr. Peter M. Chapman, devel-
                                      above-referenced website.             oped kinetic bioaccumulation
                                          This Perspective article,         models for copper, zinc, and cad-
                                      "Conducting ecological risk           mium in freshwater fish, consider-
                                      assessments of inorganic metals       ing both dietary and water uptake.
                                      and metalloids: Current status",      Laboratory-based model values
                                      was selected by the journal as the    predicted site-specific metal accu-
                                      Ecological Risk Assessment Paper      mulation in contaminated lakes of
                                      of Year 2003.                         southeastern Canada with reason-
                                          The two MITE-RN interns have      able accuracy. He recently accepted
                                      spent a productive year. Dr.          a post at the University of Prince
                                      Richard Goulet, working at            Edward Island, where he is now
                                                                                           continued on page 7



                                                  6
                                       MITE-RN NEWS, WINTER 2004
                                             ECOLOGICAL RISK ASSESSMENT




Conceptual model for metals in aquatic systems. From Chapman et al. 2003, Conducting ecological risk assessments of
inorganic metals and metalloids: Current status, Hum Ecol Risk Assess 9: 641-697.
(1) runoff and point sources; (2) atmospheric deposition (and volatilization for Hg); (3) uptake from dissolved phase; (4) trophic transfer;
(5) deposition of detrital organic matter; (6) precipitation/dissolution and sorption/desorption/ (7) uptake by rooted macrophytes; (8) ben-
thic organisms may ingested sediment or irrigate their burrows and take up metals from water column; (9) emergence of insects. Me2+:
free mital ions (metal aquo complexes); MeL x : metal complexed with ligan L (charges are neglected for simplicity); MeS: metal precipi-
tates; =S-0Me: metal adsorbed on particles.

  developing organ-specific bioaccumulation models for                   Framework (EPA/630/R-92/001; February 1992). The
  gill, liver and gut, to determine levels of metals accu-               Framework is being developed and will supplement
  mulation that are associated with toxicity.                            existing guidance and discuss key issues with metal-
      A full day session at the Aquatic Toxicity Workshop                specific information. A key component of this Framework
  in Ottawa (October 2003) highlighted MITE-RN                           will be papers on major scientific issues. Following a
  research. The session was entitled “ERA assessment of                  news story on MITE-RN in the Society of
  metals in the environment: atmospheric, terrestrial and                Environmental Toxicology and Chemistry newsletter,
  aquatic”. The focus audience was both academics and                    SETACGlobe, US EPA requested that the Network pre-
  policy makers (industry, NGOs and government).                         pare three issue papers for inclusion in the Framework:
      MITE-RN research is having an effect on policy in                  1) Assessing atmospheric metals deposition; 2)
  the United States. The US EPA has established a Metals                 Accounting for effects of metal mixtures; and, 3)
  Framework Plan (MAP), which is intended to establish                   Assessing indirect effects of metals in aquatic systems.
  a process that will assure: 1) consistent application of               These papers were prepared and will comprise key
  scientific principles for assessing hazard and risk for                components of US EPA’s final Framework document.
  metals; 2) process transparency (i.e., articulating                        Other MITE-RN ERA activities include presentations
  assumptions and uncertainties); and, 3) flexibility to                 at scientific meetings in North American, Australia and
  address program-specific issues. The MAP recom-                        Europe as well as an upcoming book chapter. Additional
  mended the development of a Metals Framework pat-                      products are expected after MITE-RN ends as additional
  terned after the Agency's Ecological Risk Assessment                   ERA products are developed.




                                                               7
                                                    MITE-RN NEWS, WINTER 2004
                                         GOVERNMENT PROJECTS
                                       SOURCES RESEARCH DOMAIN


FEDERAL GOVERNMENT RESEARCH CONTRIBUTIONS TO THE NETWORK



I
     n 1997, when establishment of       plus. Therefore, it is important to        research projects led by 12 federal
     a Metals in the Environment         Canada that the science is ‘right’.        researchers were supported between
     Research Network was first dis-         The federal scientists’ reason for     1998-99 and 2003-04. MAC’s 5 year
     cussed, government scientists       supporting the Network concept was         support commenced in 1998, a year
were invited to participate as the       to find a mechanism where the              before NSERC’s, and the SSC
prime Network objective was to           research ‘power’ of the university         planned activities so that the last
generate knowledge to inform the         community could be focussed on             project ended in the final year of
development of federal science-          MITE issues. The new knowledge             the Network.
based regulations and policy con-        would support their activities in              As can be seen, the projects cov-
cerning metals in the environment.       developing the science-based regu-         ered a wide range of MITE topics.
The catalyst that brought the poten-     lation and policy that would permit        The lake sediment work was focussed
tial university, government and          Canada to meet its sustainable             on abiotic and biotic processes
industry partners together was the       development objectives. A second-          affecting trace element mobility in
minerals and metals industry,            ary outcome was that the main              sediment columns, thus supporting
specifically the Mining Association      industry partner, the Mining               the objectives of <Sources> Project
of Canada. The continued sustain-        Association of Canada, set aside a         A4, and investigating Hg isotopes as
able use of metals by society, both      portion (20%) of its annual contri-        a tool for source apportionment.
in Canada and globally, will be con-     bution to the Network to support           The Arctic studies built on the fed-
ditional on sound regulations that       research in federal laboratories.          eral Departments’ access to Arctic
provide protection for the environ-      From 1998 to 2003 projects were            materials, whale baleen, and beluga
ment and society from the deleteri-      solicited from researchers in              and seal teeth, from modern and
ous effects that some metal species      Environment Canada, Fisheries and          archeological collections, to study
can have. The minerals and metals        Oceans Canada, and Natural                 the accumulation of Hg by biota
industry is a major contributor to       Resources Canada. Similarly to uni-        over time. The major EC project to
Canada’s prosperity, providing the       versity projects, these were reviewed      study the atmospheric dispersion
raison d’etre for many communities.      by the MITE-RN Science Steering            of stack-emissions from the Rouyn-
Mining contributed $36.1 billion to      Committee (SSC) and judged on              Noranda Cu-smelter and the Nanticoke
the economy in 2002, 3.7% of GDP,        their relevance to Network objec-          coal-fired electrical power plant
and minerals and mineral products        tives, and how they complemented,          received industry support through
provided 12.6% of total exports in       or actively supported, university-         the provision of a post-doctoral fel-
2001, contributing to our trade sur-     based projects. As a result, 15            low for two years. Studies of aquatic
                                                                                                 continued on page 9


   TOPIC                               PROJ YRS      DEPARTMENTS                         PROJECT LEADERS

  Lake Sediment Records                   5          EC, DFO, NRCan               T Jackson, J Smith, D Gould
  Historical Records in Arctic Biota      4          DFO, NRCan                   R MacDonald, R Stewart, P Outridge
  Atmospheric Dispersion                  2          EC                           C Banic
  Aquatic Toxicity                        2          EC, DFO                      L Grapentine, V Palace
  Soils Toxicity                          1          EC                           R Scroggins
  Boreal Forest Metal Cycling             4          NRCan                        M Savard
  Natural Sources                         1          NRCan                        J Percival
  Meta-Analysis                           1          EC                           L Grapentine



                                                         8
                                              MITE-RN NEWS, WINTER 2004
METHOD FOR ANALYSIS OF MERCURY SPECIES ASSOCIATED           Borgmann of EC, and secondly, <Processes> Project B4
WITH ATMOSPHERIC PARTICULATE MATTER                         included Conrad Grégoire of NRCan; similar to B4,
continued from page 2                                       NRCan also supplied specialized analytical support to
                                                            <Sources> Projects A2 and A5. Finally, the topic of
    A batch of three replicate airborne particulate mat-
                                                            meta-analysis was addressed in support or environ-
ter samples were collected in Toronto and these sam-
                                                            mental risk assessment, meta-analysis being the analy-
ples were analyzed using this method. Reproducible
                                                            sis and combination of the statistical analyses from
results were obtained and Hg0, HgCl2, HgO and HgS
                                                            multiple studies to derive a single statistical statement
species were detected from these samples.
                                                            based on all the different study results.
    Samples of airborne particulate matter were col-
                                                                The six years of collaboration with the MITE-RN
lected from three different locations: downtown
                                                            has had many benefits. At the regulatory and policy
Toronto; an industrial area (in collaboration with
                                                            level, the results of Network research have informed
Robert Kozopas, Ontario Power Generation, OPG); and
                                                            recommendations made by federal scientists. Of great
Alert in the Arctic. Suspended particles in rainwater
                                                            value have been the positioning of Network-supported
were also collected, in collaboration with project B-1,
                                                            science in the Environmental Risk Assessment model
W. Hendershot. These samples were analyzed by ther-
                                                            by Peter Chapman, and the preparation of briefs on
mal desorption and the results are presented in Fig. 2.
                                                            Network science results. These documents are of par-
Comparison of the results in Figs. 1 and 2 suggests that
                                                            ticular relevance to senior federal managers charged
mercury in the samples of airborne particulate matter is
                                                            with regulatory and policy development. The results of
probably present as a mixture of elemental and HgCl2,
                                                            the Network supported research have been published
with their distribution varying with sampling locations.
                                                            in peer-reviewed journals, and presented at interna-
In contrast, mercury associated with suspended parti-
                                                            tional conferences. Importantly, at a personal level,
cles in rainwater is mainly HgS, which is sparingly sol-
                                                            links have been developed, or strengthened, between
uble in water (Ksp= 2x10-53).
                                                            university and federal scientists; some of which led to
                                                            funded projects in the short life of the federal Toxic
J.Y. LU (Department of Chemistry and Biology,
                                                            Substances Research Initiative, 1999-2002.
Ryerson University), and D.C. GRÉGOIRE (Analytical
                                                                In conclusion, the links and collaboration between
Chemistry Research Laboratories Geological Survey of
                                                            federal and university researchers fostered by the
Canada)
                                                            Network have been productive, and have benefited
                                                            both. Each brings research and laboratory capabilities
                                                            that complement one another, and sum of the whole is
FEDERAL GOVERNMENT RESEARCH CONTRIBUTIONS                   greater than the sum of the parts. As federal scientists,
TO THE NETWORK                                              we appreciate the support provided to us by industry
continued from page 8                                       to work on the issues of importance to them and to
processes and soils toxicity supported the objectives       Canada.
of <Impacts> Project C3 and <Processes> Project B2.
Studies on metal cycling in boreal forest trees in the      ROBERT G. GARRETT (MITE-RN Federal Projects
Rouyn-Noranda area tied directly to <Processes>             Coordinator, Geological Survey of Canada, Natural
Project B2, with the field work being carried out at        Resources Canada)
the same sites. The natural sources study was com-
pletely integrated with <Sources> Project A7, with
the Geological Survey undertaking mineral separa-
tions and mineralogical studies in its laboratories. In
this context, some university-based projects must be
mentioned as they were fully integrated with federal
science programs. Through this mechanism,
Departments provided in-kind support to MITE-RN
activities. Firstly, <Impacts> Project C1included Uwe




                                                        9
                                             MITE-RN NEWS, WINTER 2004
                                              ANNOUNCEMENTS


 2004 ANNUAL SYMPOSIUM
 MITE-RN’s 2004 symposium will be a 3-day program in order to present research results of MITE-RN’s five year program.
 The dates for this symposium will be May 11-13/04; registration details on our web site.



APPOINTMENTS AND AWARDS IN 2003
Congratulations to:
• Dr. Christopher Wood, McMaster University, and
  MITE-RN Impacts Domain member, on his fellowship
  appointment to the Royal Society of Canada. This
  accolade is one of Canada’s highest academic distinc-
  tions.
• Dr. Peter Dillon, Trent University, and MITE-RN
  Processes Domain member, on being awarded the
  Miroslaw Romanowski Medal by The Royal Society of
  Canada. This award recognizes significant contribu-
  tions in the field of environmental science.
• Lisa Kramer, a PhD student with Peter Campbell and
  Landis Hare at INRS-ETE, won the 2003 Best Student
  Platform Presentation Award at the recent Society of
  Environmental Toxicology and Chemistry (SETAC)
  meeting in Austin, Texas.

COMMUNICATIONS AND NETWORKING
Research Communications
During February 2003, MITE-RN organized its fourth
annual research symposium which included a workshop
on the “Biotic Ligand Model”, an approach currently
under consideration in North America and Europe for
estimating metal bioavailability in receiving waters. In
addition to presentations on progress from MITE-RN
collaborators, the 2003 Symposium also included pre-
sentations on the current status of various European          MITE-RN NEWS is a communication produced by the MITE-RN Secretariat,
                                                              the Canadian Network of Toxicology Centres, University of Guelph, Edmund
metal risk assessments from EUROMÉTAUX, the Nickel
                                                              Bovey Bldg., Gordon Street, Guelph, Ontario N1G 2W1.
Producers’ Environmental Research Organization                EXECUTIVE EDITORS: Donna Warner and Len Ritter.
(NiPERA), and the International Copper Association.           SECRETARIAT CONTACT INFORMATION:
Representatives from these associations attended the          Tel.: 519-837-3320; Fax.: 519-837-3861
entire symposium, and learned first-hand about the var-       E-mail: dwarner@tox.uoguelph.ca
ious MITE-RN research initiatives. This emphasis on fos-      Articles appearing in MITE-RN News may be reprinted;
                                                              acknowledgment appreciated.
tering international collaboration on metals research ini-
                                                              Visit the Metals in the Environment Research Network web site:
tiatives is a key MITE-RN priority.                           www.mite-rn.org
                                                              If you would like to be added or removed from our mailing list, access
SSC APPOINTMENT                                               www.mite-rn.org/publicat/mite_news/mite_pub.cfm#sub or
We are pleased to announce the appointment of Dr.             contact us directly at the number above.
Robert Dwyer to the Science Steering Committee. Dr.           Design and production by MediaDoc. www.media-doc.com
Dwyer is with the International Copper Association.




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                                            MITE-RN NEWS, WINTER 2004

				
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posted:9/22/2011
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