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Nature and Sources of Waste

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					Nature and Sources of Waste




     SMK Negeri 13 Bandung
            Objectives


  After this session, the students are
  expected to be able :

1. To explain the definition of waste
2. To explain classification of waste




                             Teknologi dan Rekayasa
           Introduction


A hazardous substance is a material
 that may pose a danger to living
 organism, materials, structures, or
 the environment by explosion or fire
 hazards, corrosion, toxicity to
 organisms or other detrimental
 effects




                            Teknologi dan Rekayasa
           Introduction


The definition of hazardous waste is:
 a material that has been left where it
 should not be and that may cause
 harm to you if you encounter it




                             Teknologi dan Rekayasa
             Purpose
Potential releases of hazardous
 materials that have the potential to
 endanger people or the surrounding
 environment at controlled or
 abandoned hazardous




                            Teknologi dan Rekayasa
             Purpose


The act requires responsible parties
 or the government to clean up waste
 site, major purposes are the
 following:
 * Site identification
 * Evaluation of danger from waste
    sites



                            Teknologi dan Rekayasa
             Purpose
* Evaluation of damages to natural
  resources
* Monitoring of release of hazardous
  substances from sites
* Removal or cleanup of wastes by
  responsible parties of goverment




                            Teknologi dan Rekayasa
          Classification
Classification of hazardous
 substances and wastes:
 * Explosives, such as dynamite or
    ammunition
 * Compressed gases, such as
    hydrogen and sulfur dioxide
 * Flammable liquids, such as gasoline
    and aluminum alkyls



                           Teknologi dan Rekayasa
           Classification
* Flammable solids, such as
 magnesium metal, sodium hydride
 and calcium carbide that burn readily

* Oxidizing materials, such as lithium
  peroxide

* Corrosive materials, such as sulfuric
  acid and caustic soda which may
  wound exposed flesh or cause
  disintegration of metal containers


                              Teknologi dan Rekayasa
           Classification

*Poisonous materials, such as
 hydrocyanic acid, aniline
* Etiologic agents, including causative
  agents of anthrax
* Radioactive material, including
  plutonium and uranium




                             Teknologi dan Rekayasa
      Characteristic wastes
Ignitability, characteristic of
 substances that are liquids whose
 vapors are likely to ignite in the
 presence of ignition sources, non
 liquids that may catch fire from
 friction or contact with water and
 which burn vigorously or persistently,
 ignitable compressed gases and
 oxidizers



                            Teknologi dan Rekayasa
      Characteristic wastes
Corrosivity, characteristic of
 substances that exhibit extremes of
 acidity or basicity or a tendency to
 corrode steel
Reactivity, characteristic of
 substances that have tendency to
 undergo violent chemical change
Toxicity, defined in terms of a
 standard extraction procedure
 followed by chemical analysis for
 specific substances

                            Teknologi dan Rekayasa

				
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