Study the significance of water pollution, the main source of water pollution

The importance of water needs no explanation.

The point of research is to solve problems. Study of water pollution.

It's to better control pollution. With the development of science and technology, pollution is also escalating. You have to study them to better govern them. This is related to pathology in medicine.

It's the same.

The study of water pollution is of great significance, mainly in the following aspects:

1.Political significance: environmental protection is a basic national policy of our country, China has formulated a series of laws, regulations and measures on environmental protection, and is full of confidence and determination in environmental protection.

Water pollution control can promote the overall idea of comprehensively promoting key breakthroughs, so as to ensure the safety of the national water environment.

2.Economic significance: Water pollution control can promote the development of urban sewage treatment industry, improve urban water environment, and ensure urban social and economic development. At the same time, water pollution control can also promote the realization of pollution reduction goals, which has an important impact on the transformation of economic development mode.

3.Social significance: Water is a basic natural resource and a strategic economic resource, and water pollution will not only affect the ecosystem, but also directly endanger human health.

Therefore, studying water pollution can help us better understand and deal with this problem, and ensure people's health and ecological stability.

4.Environmental significance: Water pollution control can allow the overburdened rivers, lakes and seas to "recuperate", thus protecting and improving the ecological environment is of great significance.

In summary, the study of water pollution is of far-reaching significance and plays an important role in promoting the coordinated development of society, economy and environment.

Industrial wastewater: The direct discharge of untreated industrial wastewater is an important source of pollution in the water body, which has the characteristics of large quantity, wide area, complex composition, high toxicity, difficult to purify, and difficult to treat. Industrial wastewater is most commonly found in the chemical industry, paper industry, food processing industry, metal products industry, iron and steel industry, leather printing and dyeing industry.

Domestic sewage: mainly all kinds of detergents and sewage, garbage, feces, etc. used in urban life, domestic sewage contains more nitrogen, phosphorus, sulfur, organic fiber, starch, sugar, fat, protein, urea, pathogenic bacteria, etc. Every year, more than 90% of China's domestic sewage is directly discharged into the water without treatment.

Agricultural sewage: including livestock manure, pesticides, fertilizers, etc. In agricultural sewage, first, the content of organic matter, plant nutrients and pathogenic microorganisms is high; Second, the content of pesticides and fertilizers is high.

Mine Residue: Mine waste is washed by rainwater and pollutes rivers, soil and groundwater. In particular, the slag of rare metal and heavy metal mining plants is washed by rainwater to make the heavy metal content in the water exceed the standard.

Air pollutants: Air pollutants can fall into rivers, lakes and seas through the sedimentation of rainwater.

Domestic pollution: water pollution caused by pollutants generated in residents' lives, such as pollution from phosphorus-containing laundry detergents;

Industrial pollution: water pollution caused by pollutants generated in industrial production, such as toxic wastewater discharged from the galvanizing yard of a paper mill;

Agricultural pollution: water pollution caused by pollutants generated in agricultural production and life, such as pesticides, fertilizers, livestock manure, bent feces, etc.

Water pollution**.

Spoiled food or animal or plant carcasses can deplete the oxygen in the water, causing bacteria to multiply and cause foul water to emit foul odors.

Plant fertilizers flow into rivers and lakes, causing algae overblooms and causing ecological changes.

Detergents, pesticides, mercury, lead, cadmium and other toxic metals flow into rivers with industrial wastewater, causing serious pollution.

Raising pigs in the upper reaches of the water source area and engaging in leisure activities such as camping and barbecue have polluted the water source.

Superior oxidation: fertilizers, detergents, and animal excrement contain a lot of nitrogen, phosphorus and other elements.

It causes a large number of microorganisms to multiply, so that the water lacks oxygen, and the fish and shrimp die.

Lose. Prevention and control of water pollution.

Strengthening wastewater treatment:

Factory: It is treated before discharging and meeting the emission standards.

Family: Establish an urban sewerage system and centralized treatment of household sewage.

Release. Personally: improve environmental awareness, reduce food waste, carefully select products that do not pollute water quality when purchasing detergents, and do not arbitrarily use water source areas.

Throw away the trash. Use scientific methods to solve the problem of water pollution.

In the aerobic state, aerophilic microorganisms can decompose organic molecules to produce CO2, H2O, NO3-, SO42-, PO32-, etc.

In the hypoxic state, anaerobic microorganisms can decompose organic molecules to produce CH4, H2S, etc., which makes the water smelly and has a black appearance.