Question

Describe water pollutants with their sources.

Answer 1

There are many causes for water pollution but two general categories exist: direct and indirect contaminant sources. Direct sources include effluent outfalls from factories, refineries, waste treatment plants etc.. that emit fluids of varying quality directly into urban water supplies.


Organic water pollutants include:

Detergents.

Disinfection by-products found in chemically
disinfected drinking water, such as chloroform.

Food processing waste, which can include oxygen-demanding substances, fats and grease.

Insecticides and herbicides, a huge range of organohalides and other chemical compounds.


Common water pollution sources. Urban runoff can carry organic, inorganic, biological pollutants, oil, and grease. Nitrates, phosphates, coliform, sediment, trash, and other debris are also often found in storm water runoff.


This occurs when pollutants and/or doing improper hazardous waste disposal directly (or indirectly) discharged into water bodies. And some examples of water pollutants are: human trash, chemicals dumped by hospitals & other companies, runoff of chemical fertilizers and pesticides from farm fields, etc.



There are several classes of water pollutants. The first are disease-causing agents. These are bacteria, viruses, protozoa and parasitic worms that enter sewage systems and untreated waste. A second category of water pollutants is oxygen-demanding wastes; wastes that can be decomposed by oxygen-requiring bacteria.

Answer 2

Answer:

• dissolved fertilizer and pesticides which are carried with flowing water from farms .
• sewage from domestic sources which may not be treated but released as it is in water body.
• effluent from the industry and factory that contains harmful pollutants.
• some industry that use water for cooling in various operation and later released in water body. this results in thermal pollution.
• water released from dams also cause thermal pollution.

Explanation:

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