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A. Causes of Water Pollution Sources

There are several causes of water pollution, among others, when the water
is contaminated with pollutants such as household waste water, industrial
sewage waste, the remnants of tau fertilizers pesticides from
agricultural areas, hospital waste, animal manure, particulate-
particulate customary result of forest fires volcano is erupting or
sediment erosion results yag places in laluinya.

Air Pollutants

Basically Water Pollutants can be grouped into:

a) Waste penguraianya process requires oxygen, which is waste containing
organic compounds, for example sapah idustri food, cane sugar industry
waste, household waste, animal waste and human waste, plants and animals
die. For the process of decomposition of the garbage banak ersebut
require oxygen, so that when the waste is contained in the water, the
waters will be deprived of oxygen, fish and organisms in water will die
of oxygen deprivation. In addition, the process of decomposition of waste
that contains proteins will produce a foul-smelling gas H2S, making the
water unfit for dimnum or to bathe.
C, H, S, N, + O2, CO2 + H2O + H2S + SO + NO2
Organic compounds

b) Material pollutants cause of the disease, ie pollutants that contain
viruses and bacteria msal coli bacteria that can cause digestive tract
diseases (dysentery, cholera, diarrhea, types) or skin disease. These
pollutants come from household waste, hospital waste, or feces of animals
and humans.
c) an inorganic compound pollutant materials / minerals such as heavy
metals like mercury (Hg), cadmium (Cd), lead (pb), copper (Cu), inorganic
salts. Pollutants in the form of black metal that enters the body usually
through food and can accumulate in organs such as kidneys, liver, spleen,
intestinal tract that disrupts the function of other organs such.
d) Raw organic pollutants that can not be broken down by microorganisms
are organic compounds derived from pesticides, herbicides, polymers such
as plastics, detergents, synthetic fibers, industrial waste and waste
e) Material pencmar form of food plants such as snyawa nitrate, phosphate
compounds can cause umbuhnya algae (algae) that rapidly cover the water
surface. Additionally, it will disrupt the ecosystem of water, turn off
the fish and organisms in the water, because levels of oxygen and
sunlight is reduced. This is due to oxygen and sunlight needed organism
in water is blocked and can not get into the water.
f) Materials in the form of radioactive contaminants, can cause cancer,
damage the cells and other body tissues. These pollutants come from
sewage plants and other nuclear testing.
g) Material pollutants in the form of sediment / soil and sediment such
as mud on the river bank due to erosion or particulate-particulate solid
/ lava is sprayed by the NII in berapu mountain that erupted, causing
water to become cloudy, sunlight is reduced and water is less able to
assimilate waste.
h) Material pollutants in the form of conditions (eg, heat), derived from
waste listrikatau waste generating industries that use water as coolant.
This hot pollutants causing the water temperature increases are not
suitable for aquatic life (organisms, fish, and plants in water). Plants,
fish, and dead organisms that will break down into organic compounds. To
enyawa organic decomposition process requires oxygen, resulting in
decreased levels of oxygen in the water.
Broadly speaking tesebut water pollutants above can be grouped into:
1. Organic pollutants, whether they can undergo decomposition by
microorganisms and which can not undergo decomposition.
2. Inorganic pollutants, heavy metals and can form minerals.
3. Pollutants in the form of sediment / sludge Anah / mud.
4. Pollutants in the form of radioactive substances.
Water pollution can be caused by many things and have different
The increased content of nutrients can lead to eutrophication.
Organic wastes such as sewer water causes increased oxygen demand on the
receiving water leading to reduced oxygen that can impact badly on the
entire ecosystem.
Industry dispose of various kinds of pollutants into the waste water such
as heavy metals, organic toxins, oils, nutrients and solids. Waste water
has a thermal effect, especially those released by power plants, which
can also reduce oxygen in water.
As plant waste is flowing into the rivers. As in the Citarum river.
Encemaran water by trash.

Can cause flooding.
Lack of water resources.
Can create a source of disease.
Could damage the river ecosystems.
Losses for fishermen.

Prevention of water pollution
To prevent water contamination does not occur, in our activity in meeting
the necessities of life should not increase the occurrence of pollutants,
among others, do not dispose of household waste, hospital waste, waste /
industrial waste in vain, do not throw into the water stream, lake or to
the in the gutter. Not using fertilizers and pesticides to excess,
because residual fertilizers and pesticides will pollute the water in the
farm environment. Not using phosphate detergents, because of phosphate
compounds is food for aquatic plants like water hyacinth that can cause
water pollution.
Water pollution that has occurred naturally for example the amount of
heavy metals enter and accumulate in the human body, these heavy metals
can poison the body through the digestive organs because the body is
consuming plants that contain heavy metals, although needed in small
quantities. Accumulation of these heavy metals occur in plants because of
contamination by industrial waste. To overcome to avoid the accumulation
of heavy metals, the industrial waste processing should be performed
before discharge into the environment.
The process of pollution prevention is better than the prevention of
pollution that has occurred.
Waste treatment
Industrial waste before disposal to landfill, poured into rivers or
ditches should be collected in a space provided, then processed, so that
when forced to be discharged into the river does not cause water
pollution. Even if you can after being processed is not discharged into
the river but can be used again for its own industrial purposes.
Solid waste from households in the form of plastic or synthetic fibers
that can not be broken down by microorganisms are separated, then
processed into other useful materials, for example, can be processed into
mats. Organic waste that can be broken down by soil microorganisms buried
in a hole, then if you have rotting can be used as fertilizer.

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