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Water Pollution
What does help in reaeration from atmosphere?
Turbidity
Sunlight
Oxygen
Carbon dioxide
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Water Pollution
‘Polychlorinated biphenyls’ are by products of plastics, lubricants, rubber and
Paper production
Wood production
Steel production
All of above
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Water Pollution
In humans, nitrates causes blood disease and
Gastric cancer
Bladder infection
Skin infection
Lung disease
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Water Pollution
Rate of oxidation depends on amount of:
Inorganic matters
Organic matters
Nutrients
Water
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Water Pollution
Man-made radiations include:
Nuclear weapons
X-rays
Nuclear power plants and cancer treatment
All of above
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Water Pollution
Composition of sewage water depends on its
Nutrient
Sources
water content
Sunlight
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Water Pollution
An example of industrial effluent toxic substance is
Nitrogen
Phosphorous
Calcium
Mercury
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Water Pollution
Greater rate of aeration, faster will be the
Self purification
Turbidity
Currents
Hydrography
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Water Pollution
Settle out portion of ‘sewage’ is known as
Dissolved solids
Settleable Solids
Colloidal Solids
Suspended Solids
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Water Pollution
End product of ‘aerobic’ decomposition are:
Unstable
stable
reactive
Non Combustible
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