Factors that cause chemical pollution of soil, characteristics of soil pollution

There are a lot of substances that can be soluble in water and are harmful to the soil.

Soil pollution is a key point of environmental protection today, and it is also a very serious problem, for soil pollution, we should protect our land and save land resources.

Soil pollution has the following characteristics:

1.Concealment and hysteresis.

2.Cumulative.

3.Irreversibility.

4.Difficult to govern.

Land pollution is a phenomenon and process in which land is invaded by mining or industrial wastes or agricultural chemicals, which deteriorates the original physical and chemical properties of the soil, reduces the production potential of the land, deteriorates the quality of the product, and causes harm to humans, animals and plants. Phenomena and processes in which the intrusion of land by mining or industrial wastes or agrochemicals deteriorates the original physical and chemical properties of the soil, reduces the production potential of the land, deteriorates the quality of the products, and causes harm to humans, animals and plants. According to different pollution sources, it can be divided into four categories: industrial pollution, transportation pollution, agricultural pollution and domestic pollution.

Industrial pollution is mainly the pollution of the atmosphere, water and soil caused by industrial waste residue, waste water and waste gas.

Soil pollution protection measures:

1.Scientifically use sewage to irrigate farmland.

2.Rational use of pesticides.

3.Actively promote biological pest control.

4.Raise the awareness of soil protection in father-in-law.

Characteristics of soil contamination:1. Soil pollution is hidden and lagging;

2. Soil pollution is cumulative.

3. Soil pollution is uneven.

4. Soil pollution is difficult to reverse.

5. Soil pollution control is arduous.

Answer]: Chemical contaminants in soil are: organic matter, including chemical pesticides, herbicides, and industrial organic waste.

Heavy metal contaminants. Be cautious of radioactive selling of destructive substances. Fertilizer.

Pathogenic microorganisms attach to soil colloids. But the most important pollutants are heavy metals and pesticides. Therefore, choose item E.

1. The waste gas, waste water and waste residue discharged from the production and operation activities of industrial and mining enterprises are the main causes of soil pollution around them. The accumulation of various solid wastes such as tailings slag and hazardous waste leads to soil pollution around it. Vehicle exhaust emissions lead to soil pollution of heavy metals such as lead and zinc and polycyclic aromatic hydrocarbons on both sides of traffic arteries.

2. Agricultural production activities are an important cause of cultivated land soil pollution. Sewage irrigation, irrational use of agricultural inputs such as fertilizers, pesticides, and agricultural films, as well as livestock and poultry breeding, lead to soil pollution of cultivated land.

3. The high natural background value is the reason for the excessive heavy metals in the soil in some regions and basins.

Soil pollution is characterized by accumulation, irreversibility, difficulty in control, concealment and lag.

Soil refers to the loose surface layer of the land surface that is fertile and capable of growing plants, and its thickness is generally about 2 m. Soil not only provides mechanical support for plant growth, but also provides water, fertilizer, gas, heat and other fertility elements required for plant growth and development.

Due to the rapid growth of population and the rapid development of industry, solid waste is constantly piled up and dumped on the soil surface, harmful wastewater continues to penetrate into the soil, and harmful gases and dust in the atmosphere continue to fall into the soil with rainwater, resulting in soil pollution.

Soil pollutants are called soil pollutants that hinder the normal function of the soil, reduce the yield and quality of crops, and indirectly affect human health through grains, vegetables, fruits, etc.

What are the hazards of soil pollution:

Soil pollution is more harmful, mainly causing adverse effects on the safety of agricultural products, human settlements and ecosystems. Crops absorb and enrich certain pollutants, affect the quality of agricultural products, cause yield reduction, and long-term consumption of agricultural products exceeding the standard may endanger human health.

Direct development of polluted land without treatment and restoration will cause long-term harm to the people concerned. In addition, soil pollution can affect the growth and reproduction of plants, animals and microorganisms, endanger the normal soil ecological process and ecological service function, is not conducive to soil nutrient transformation and fertility conservation, and affects the normal function of soil.

1. Soil pollution is difficult to control. It takes a lot of manpower, material and financial resources to govern, and it may not achieve good results.

2. Soil pollution is uneven. The accumulation and landfilling of organic pollutants will cause soil pollution, and the accumulation and landfilling of pollutants are often uneven, which will lead to inconsistent pollution levels in different places of the same land.

3. Soil pollution is imperceptible. The damage of soil pollution to the human body is not obvious, and can only be detected through laboratory tests during physical examinations, and the damage to plants can only be detected during crop sampling.

4. Soil pollution is cumulative. Because the soil is solid, has poor fluidity, and is difficult to self-purify, the factors that cause soil pollution continue to accumulate, causing serious damage to plants, animals and human bodies.

5. Soil pollution is irreversible. The soil pollution caused by heavy metals is difficult to reverse, and the soil pollution caused by various organic pollutants is also difficult to degrade, and it is difficult to treat it by technical means, and the treated soil is still worse than the soil before pollution.