What are the hazards of soil pollution What are the hazards of soil pollution

The main hazards of soil pollution are:

1. It leads to a decrease in crop yield and the quality of agricultural products.

2. Polluting groundwater and surface water.

3. Affect the quality of the atmospheric environment.

4. Endangering human health.

The pollutants entering the soil mainly have different destinations such as fixation, volatilization, degradation, dispersion and leaching due to their different types and properties. Heavy metal ions are mainly ions that can make soil inorganic and organic colloids stably adsorb.

Including the ions that are obligate adsorption with oxides and tightly bound to humin, as well as insoluble metal hydroxides, carbonates and sulfides produced in the chemical equilibrium of soil solutions, most of which are fixed in the soil and difficult to eliminate; Although some chemical reactions can mitigate its toxic effects, they are still a potential threat to the soil environment.

1. Soil pollution leads to serious direct economic losses.

Pollution of crops and loss of yields. There is a lack of systematic investigation data on the economic losses caused by various types of soil pollution. Taking soil heavy metal pollution as an example, the country's grain production is reduced by more than 10 million tons every year due to heavy metal pollution, and the grain polluted by heavy metals is also as high as 12 million tons per year, with a total economic loss of at least 20 billion yuan.

2. Soil pollution leads to the continuous decline of biological quality.

Most of the soils in the suburbs of cities in China have been polluted to varying degrees, and the content of heavy metals such as cadmium, chromium, arsenic, and lead in grain, vegetables, fruits and other foods in many places exceeds the standard and is close to the critical value. In addition to the hygienic quality of food, soil contamination also significantly affects other qualities of crops. In some areas, the polluted irrigation has made the taste of vegetables worse, easy to rot, and even unpleasant odors; The storage quality and processing quality of agricultural products cannot meet the requirements of deep processing.

3. Soil pollution endangers human health.

Soil pollution will cause pollutants to accumulate in plants (crops) and enrich them into human and animal bodies through the food chain, endangering human and animal health, causing cancer and other diseases.

4. Soil pollution leads to other environmental problems.

After the land is polluted, the polluted topsoil with high concentrations of heavy metals is easy to enter the atmosphere and water bodies under the action of wind and water power, respectively, resulting in other secondary ecological and environmental problems such as air pollution, surface water pollution, groundwater pollution and ecosystem degradation.

Soil contamination can have serious consequences, threatening both the environment and human health. Soil organisms directly absorb harmful substances from polluted soil, and grain, vegetables and animal husbandry products, which are the main food of human beings, all come directly or indirectly from the soil, and the enrichment of pollutants in the soil will inevitably cause food pollution and ultimately endanger human health.

It can also lead to reduced crop yields and reduced quality of agricultural products. Some contaminated soils are directly radioactive and have an impact on human health and the survival of other organisms. In terms of ecological and environmental effects, land pollution will directly lead to the deterioration of soil properties, which will reduce vegetation and biodiversity.

Land pollution may also cause secondary environmental problems such as air, surface water, groundwater pollution and human and animal diseases.

<> "The Hazards of Soil Pollution.

1.Soil contamination leads to serious economic losses of direct impact. According to preliminary statistics, about 10 million hm2 of polluted cultivated land has been polluted, 36 million hm2 of farmland has been polluted by organic pollutants, and the rate of pesticide residues in major agricultural products exceeding the standard is as high as 16% to 20%. Sewage irrigation pollutes 10,000 hm2 of cultivated land, and solid waste storage occupies 10,000 hm2 of land.

Every year, more than 10 million tons of grain are reduced due to soil pollution, causing various economic losses of about 20 billion yuan.

2.Soil contamination leads to a continuous decline in the quality of biological products. Due to the application of chemical fertilizers in farmland, the soil in most urban suburbs is polluted to varying degrees, and the content of heavy metals such as cadmium, arsenic, chromium and lead in grains, vegetables, fruits and other foods in many places exceeds the standard or is close to the critical value.

Every year, 10 million tons of nitrogen is converted into pollutants and enters the environment, and nitrates and nitrites in agricultural products are seriously polluted. The area of soil polluted by agricultural film is more than 7.8 million hm2, and the residual agricultural film has a role in blocking the flow of soil capillary water, deteriorating soil physical properties, affecting soil aeration and water permeability, and affecting crop yield and agricultural product quality.

3.Soil pollution is harmful to human health. Soil contamination can cause pollution to accumulate in plants and enrich human and animal bodies through the food chain, endangering human health and causing cancer and other diseases.

4.Soil contamination leads to other environmental problems. After the soil is polluted, the polluted soil with high concentration of heavy metals is easy to enter the atmosphere and water under the action of wind and water respectively, resulting in other secondary ecological and environmental problems such as air pollution, surface water pollution, ground mold limb water pollution and ecosystem degradation.