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The reporter learned from the National Soil Pollution Survey and the Special Conference on Pollution Prevention and Control held in Beijing on July 18th that the National Environmental Protection Administration and the Ministry of Land and Resources have jointly undertaken the national soil pollution that lasted three and a half years and invested 1 billion yuan. The system investigation has entered the implementation stage. The survey aims to identify soil pollution caused by organic matter in key areas in order to establish soil pollution prevention laws and regulations and standards system. Experts in the industry have warned that this means that the chemical industry that has just undergone environmental pollution inspections in rivers and waters across the country will face the “environmental protection storm†of soil pollution.
It is understood that in the face of pollution in river waters, soils in some areas of China are also polluted to varying degrees, posing a threat to the ecological environment, food safety and sustainable agricultural development. According to incomplete investigations, there are currently about 150 million acres of arable land in China, 32.5 million acres of polluted arable land for sewage irrigation, and 2 million acres of land for solid waste storage, which together account for about 1/10 of the total area of ​​arable land. .
At present, the main causes of soil pollution in China are:
Indiscriminate application of fertilizers and pesticides. Calculated according to the amount of cultivated land, the use of chemical fertilizers in China reaches 40 tons per square kilometer, far exceeding the safety upper limit per unit area set by developed countries to prevent chemical fertilizers from harming the soil and water bodies.
Plastic film flooding. In the past 20 years, China has occupied the top place in the world for the amount of plastic film and its coverage area. According to a survey conducted by the Environmental Protection Bureau of Zhejiang Province, the average residue of plastic film in the surveyed area was 3.78 tons/km2, resulting in a production loss of about 20% of the output value. With the progress of agricultural modernization in the Midwest, this type of pollution is also common in the main grain production areas in the central and western regions.
Oil, solid liquid waste and other organic materials leaked.
It is understood that the main contents of this survey include: Soil environmental risk assessment based on soil environmental risks by analyzing the contents of heavy metals, pesticide residues, organic pollutants, and soil physicochemical properties in the soil, combining land use types and soil types. . In addition, the risk assessment and safety classification of soil pollution in key regions were carried out. The investigation focused on the environmental hot spots around the heavily polluting enterprises, industrial legacy or abandoned sites, solid waste disposal and disposal sites, oil fields, and mining areas, and identified the type, scope, extent of soil pollution, and the spatial distribution of soil heavy pollution areas. , analyze the causes of pollution.
According to another report, the Soil Pollution Prevention Law is being drafted.
heating storage equipment can provide hot water (<85℃),hot air (<400℃),heat conduction
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It is understood that in the face of pollution in river waters, soils in some areas of China are also polluted to varying degrees, posing a threat to the ecological environment, food safety and sustainable agricultural development. According to incomplete investigations, there are currently about 150 million acres of arable land in China, 32.5 million acres of polluted arable land for sewage irrigation, and 2 million acres of land for solid waste storage, which together account for about 1/10 of the total area of ​​arable land. .
At present, the main causes of soil pollution in China are:
Indiscriminate application of fertilizers and pesticides. Calculated according to the amount of cultivated land, the use of chemical fertilizers in China reaches 40 tons per square kilometer, far exceeding the safety upper limit per unit area set by developed countries to prevent chemical fertilizers from harming the soil and water bodies.
Plastic film flooding. In the past 20 years, China has occupied the top place in the world for the amount of plastic film and its coverage area. According to a survey conducted by the Environmental Protection Bureau of Zhejiang Province, the average residue of plastic film in the surveyed area was 3.78 tons/km2, resulting in a production loss of about 20% of the output value. With the progress of agricultural modernization in the Midwest, this type of pollution is also common in the main grain production areas in the central and western regions.
Oil, solid liquid waste and other organic materials leaked.
It is understood that the main contents of this survey include: Soil environmental risk assessment based on soil environmental risks by analyzing the contents of heavy metals, pesticide residues, organic pollutants, and soil physicochemical properties in the soil, combining land use types and soil types. . In addition, the risk assessment and safety classification of soil pollution in key regions were carried out. The investigation focused on the environmental hot spots around the heavily polluting enterprises, industrial legacy or abandoned sites, solid waste disposal and disposal sites, oil fields, and mining areas, and identified the type, scope, extent of soil pollution, and the spatial distribution of soil heavy pollution areas. , analyze the causes of pollution.
According to another report, the Soil Pollution Prevention Law is being drafted.
heating storage equipment can provide hot water (<85℃),hot air (<400℃),heat conduction
oil(<300℃) and high temperature steam (100~200℃).
The boiler is widely used in printing drying industry, painting industry , food
processing industry and many other industries heating.
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