Chemical Engineering @ChemengFiles.Com

Contamination by viruses and bacteria: Wastewater is contaminated by bacteria and viruses. Can cause illness and usually comes from fecal matter.
Possible water treatment: Filtration: can remove much of the bacteria and virus pathogens.
Chlorination: will destroy the pathogens that remain.

Toxic Chemicals: All synthetic compounds from the chemical industry: such as herbicides, insecticides, pesticides, and others. Polychlorinated biphenyls (PCBs) are used to exchange heat at power plants.
highly toxic heavy metals: elements such as cadmium, lead (from gasoline) or mercury.
Contaminants organic: organic pollutants differ from previous ones because they are toxic in themselves.

Water discharge, domestic and industrial, are the main sources of organic matter. In special plants for water treatment is carried out the removal of these contaminants.

Eutrophication: is called Eutrophication in and harmful overgrowth of algae, either in tanks, lakes, or lagoons. pollution problems caused by eutrophication:
- It's annoying to use water for recreation.
- Prevent use of contaminated water as drinking water source.
- Generates competition for the supply of oxygen, causing massive fish kills and other species.
- Difficulty in activities like fishing and water sports.

Thermal pollution of water: The main cause of thermal pollution is the use of water for steam condensation turbines producing electricity generators.
Adverse Effects: At high temperatures, there is the death of aquatic life that inhabits the cooling wastewater. Increase metabolisms and consume more food, as well as dissolved oxygen.
Dissolved oxygen decreases with increasing temperature.
Possible methods of control: Evenly distribute the amount of heat in large volumes of water. Use cooling towers for water treatment.

Contamination of water due to oil: polluting sources of oil, accidents in the moments of the hydrocarbon extraction or transport.
Naturally occurring seepage from land to ocean.
Negative effects: Damages to coastal areas and is extremely toxic to marine life.

Contamination with radioactive substances:
sources of pollution: the laboratories and nuclear power plants. Also the processing of uranium.
side effects: they are very dangerous substances.