Analysis of the severity of soil pollution in China
Multi-parameter soil measuring instrument It is reported that from April 2005 to December 2013, the Ministry of Environmental Protection and the Ministry of Land and Resources conducted the first national survey of soil pollution. The survey sites cover all cultivated land, some forest land, grassland, construction land, etc. The actual survey area is about 6.3 million square kilometers.
According to the communique, soil pollution in southern China is more important than in the north; soil pollution problems in some regions such as the Yangtze River Delta, the Pearl River Delta, and the old industrial base in northeast China are more prominent; soils in the southwest and south-central regions have a greater range of excessive levels of heavy metals; cadmium, mercury, arsenic, and lead are inorganic. The pollutant content distribution gradually increases from northwest to southeast and from northeast to southwest.
The survey found that the national soil exceeds the standard rate of 16.1%, slight pollution points account for 11.2%, and the proportion of light, moderate and severe polluted soils is 2.3%, 1.5% and 1.1%, respectively. The over-standard rates of soil sites in forest land and grassland were 10% and 10.4%, respectively. Inorganic-based pollution was the main source, with over-standard occupancies accounting for 82.8% of all over-targeted sites, followed by organics, and eight inorganic pollutants such as cadmium, mercury, arsenic, copper, lead, chromium, zinc, and nickel exceeding the standard. The rates were 7%, 1.6%, 2.7%, 2.1%, 1.5%, 1.1%, 0.9%, and 4.8%, respectively; the over-standard rate of organic pollutants in the three types of organic pollutants such as BHC, DDT, and polycyclic aromatic hydrocarbons was 0.5%, respectively. 1.9%, 1.4%.
Multi-parameter soil measuring instrument introduced "China's soil pollution is a long-term accumulation in the process of economic and social development. The exhaust gas, waste water, and waste residue discharged from the production and business activities of industrial and mining enterprises are the main causes of soil pollution in the surrounding areas. In particular, tailings slag, Accumulation of various types of solid wastes, such as hazardous wastes, has caused soil pollution in the surrounding areas, which has led to the pollution of soil lead, zinc, and other heavy metals and polycyclic aromatic hydrocarbons on both sides of the main line of traffic. Agricultural production activities have also contributed to the pollution of cultivated land and soil. The irrational use of agricultural inputs such as chemical fertilizers, pesticides, and plastic sheets, and livestock and poultry breeding have resulted in pollution of farmland soil. In addition, high natural background values are responsible for excessive heavy metals in soils in some regions and river basins.” Mining, metal smelting, etc. are one of the main reasons for the excessive content of heavy metals in grain.
Introduction of multi-parameter soil measuring instrument For public concern about the pollution of cultivated land, the communique showed that the over-standard rate of farmland soil was 19.4%, among which the proportions of minor, light, medium, and severe pollution were 13.7%, 2.8%, and 1.8% respectively. At 1.1%, the main pollutants were cadmium, nickel, copper, arsenic, mercury, lead, DDT, and polycyclic aromatic hydrocarbons.