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There are three main types of chemical pollution:
1. The water temperature of heat-polluted sewage is one of the important physical properties of sewage water quality. As far as sewage treatment itself is concerned, how low (e.g. below 5) or too high (e.g. above 40) of the water temperature will affect the biological treatment effect of the effluent.
Hotter effluents mainly come from cooling water from thermal power plants and various heat-generating plants. After the untreated cooling water is discharged into the water body, the water temperature of the receiving water body increases, the toxicity of toxic substances in the water increases, the dissolved oxygen decreases, and the growth of aquatic organisms is endangered and even leads to death.
2. Suspended matter pollution suspended solids refer to insoluble substances contained in water, including solid substances, plankton and emulsified oils (foams). They mainly come from domestic sewage, garbage and sewage from industries such as mining, building materials, food, papermaking, etc., or soil erosion caused by surface runoff. The presence of suspended matter causes turbidity and deterioration of the water and changes the color of the water.
3. The radioactive substances in radioactive contaminated sewage mainly come from the production and use of radioactive metals such as uranium and radium, such as radioactive mineral deposits, nuclear tests, nuclear power plants and isotope laboratories in hospitals.
The decay of radioactive substances releases radioactive nucleophiles (r-rays) to constitute a special kind of pollution, that is, radioactive pollution, which carries out chronic radiation to the human body and can accumulate for a long time, causing potential effects and inducing anemia, cancer, etc.
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The types of chemical pollutants can be divided into inorganic chemical industry and organic chemical industry pollution according to the nature of the pollutants; According to the form of pollutants, it can be divided into waste gas, waste water and waste residue. In general, chemical pollutants are produced during the production process, but the causes of their occurrence and the ways to enter the environment are varied. These include:
1) Waste produced by incomplete chemical reactions; (2);(3) Exhaust gas generated during combustion; (4) Cooling water; (5) Leakage of equipment and pipelines; (6) Other wastes discharged from chemical production, etc. To sum up, the main ** of chemical pollutants can be roughly divided into the following two aspects.
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The main industrial pollutants include the following categories:
1.Air pollution: It is mainly caused by the burning of fossil fuels, harmful gases and particulate matter emitted from the production process, such as sulfur dioxide, nitrogen oxides, volatile organic compounds, particulate matter, etc.
These pollutants can cause serious damage to human health and the environment, such as causing respiratory diseases, acid rain, the greenhouse effect, etc.
2.Water pollution: mainly from the pollution caused by industrial wastewater discharge, agriculture, breeding and other activities, which contains a large number of toxic and harmful substances, microorganisms and nutrients, etc., which are harmful to aquatic organisms and human health.
3.Soil pollution: Mainly due to the use and discharge of chemicals such as industrial waste, pesticides, fertilizers, etc., these harmful substances will affect the soil ecosystem and threaten the health of human beings and animals and plants.
4.Noise pollution: Mainly due to the noise generated by machinery and equipment, transportation, etc., it has adverse effects on the human body, such as interfering with hearing, causing headaches, insomnia, etc.
5.Solid waste pollution: mainly domestic garbage, construction waste, industrial solid waste, etc., among which liquid denier contains a large number of harmful substances and chemicals, which pose a serious threat to the environment and human health.
In view of these industrial pollution problems, effective measures need to be taken to control and prevent them. For example, air pollution can be tackled by strengthening emission standards, promoting clean energy, and raising environmental awareness. Water pollution can be solved by means of sewage treatment technology and strengthened supervision; Soil pollution can be prevented and controlled by means of soil remediation, reducing the use of chemical fertilizers and pesticides, and carrying out land use planning.
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The main types of industrial pollution currently include:
1.Air pollution: carbon dioxide, nitrogen oxides, sulfur oxides, volatile organic compounds and other chemicals produced by burning fossil fuels.
2.Water pollution: through the production and wastewater treatment process of the factory, the pollutants in the wastewater such as heavy metals, organic pollutants, nitrogen, phosphorus, etc. are discharged;
3.Land pollution: Changhao soil is affected by industrial pollutants and waste, such as organic chemicals, heavy metals, radioactive materials, etc.;
4.Sound pollution: noise pollution caused by noisy production equipment and mechanical equipment.
5.Other industrial pollution: including solid waste, electromagnetic radiation, etc.
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According to the types of industrial pollution nuclear stoves, they are divided into gas pollution, solid pollution, and liquid pollution. Gas pollution is mainly carbon dioxide, sulfides such as sulfur dioxide, cyanide and other gases. Solid pollution is mainly particulate, and the previous main band was particulate matter.
Liquid contamination is mainly caused by water that contains various heavy metals or is poisonous. Personal understanding is not comprehensive enough, just throwing bricks and stones.
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The chemical industry is a general term for enterprises and units engaged in the production and development of the chemical industry. The chemical industry penetrates all aspects and is an indispensable and important part of the national economy, and its development is of great practical significance for human economic and social development.
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Chemical pollution does not include information pollution.
What is Chemical Pollution?
Chemical pollution is the pollution of the environment caused by chemical substances (chemicals) entering the environment. That is, environmental pollution caused by chemical pollutants. These chemicals are organic and inorganic, and they are mostly products made by human activities or artificial creation, and there are also secondary pollutants.
Potential foodborne hazards due to chronic long-term ingestion of chemical organic pollutants (MOPs), including pesticide residues, veterinary drug residues, mycotoxins, certain carcinogenic and mutagens formed during food processing (e.g., nitrosamines, etc.), and industrial contaminants, such as well-known dioxins, have become a major concern.
There are 10 million chemical substances synthesized worldwide, and about 1,000 are newly registered and put on the market every year. There are 10,000 kinds of chemicals that can be synthesized in China. These chemicals have played a huge role in promoting the progress of the society, improving productivity, eliminating pests, reducing diseases, and facilitating people's lives, but they will inevitably enter the environment and cause pollution in the process of production, transportation, use, and disposal.
People are most concerned about those chemicals that are acute and chronic toxicity to organisms, volatile, refractory to degradation in the environment, high residues, and harmful to health through the food chain, and they are carcinogenic, teratogenic and mutagenic to animals and humans.
Chemicals enter the environment through accidents or through direct application; It also enters the environment through the discharge of exhaust gas, waste residue and waste liquid. For example, sulfur dioxide, nitrogen oxide and polycyclic aromatic hydrocarbons in the atmosphere mainly come from exhaust gases; Heavy metals in rivers, lakes and seas mainly come from wastewater and waste residue; Exposure to occupational environments is also a major way chemicals can harm the human body.
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