Crushing grille to cope with environmental soil pollution control measures
Soil pollution can lead to soil environmental normal function disorder and the decrease of the quality of the soil, water, air, biology and human health and the impact. To protect it, we should not only reduce the industrial waste, living garbage, pesticide and fertilizer pollution, prevent through irrigation pollution caused by industrial wastewater and sewage, also want to prevention and control of atmospheric pollutants in the settlement of soil pollution. In addition to the remote place, and now through the rural river pollution and soil pollution. PM2.5 increases respiratory disease prevalence, and closer to children from the ground, absorb pollutants and more. According to the survey, our country the urban children asthma prevalence was 3.01%, more than 10 years ago increases one times. Lung detoxification system not mature, experts say, children, infants and young children when breastfeeding can improve respiratory symptoms, increase resistance. Soil pollution is increasingly serious, 1/6 of the cultivated land, about 20 million hectares of farmland are polluted by heavy metals, most excessive heavy metal content of agricultural products. Completely cure PM2.5 is real local autonomy, the power to the people, now such a headache cure head kaufmann, certain governance is bad air. The other two bigger crisis, water and soil pollution crisis is still not fully reflected, that is disastrous. Once the soil pollution cannot be fully restored
Public data shows, more than half of the provinces autonomous region, municipality directly under the central government in 2013 introduced to environmental pollution control measures. Around in the attention of the prevention and control of atmospheric pollution at the same time, in such aspects as water pollution, soil pollution also issued relevant planning, plans to invest heavily to speed up the environmental protection infrastructure construction. Will bring protective equipment, such as clean energy industry development opportunities and ion mineralization stabilization "heavy metal contaminated soil repair technology research and application" by hunan province department of scientific and technological achievements appraisal; In July 2013, the heavy metal pollution of soil ion mineralization is listed as national key environmental protection practical technology. At present, has applied two national invention patent. The technology not only filled the domestic blank, broke the long-term rely on foreign imports, more important is the soil heavy metal repair cost is much lower than international level. Environmental protection sector will continue to receive funding attention. Soil in the nation after the strict classification is very important, to planting areas according to the characteristics of the plant. Under the condition of the contaminated soil could not be repaired completely, to the strict division of origin planted function of changsha, is one of the best ways to use contaminated soil again.
Soil pollution has been to reduce food produce 10 billion kilograms. The environmental protection department also has the statistics, every year because of the heavy metal pollution of the nation's food, as much as 12 million tons, caused the direct economic losses of more than 20 billion yuan. One 5 of the total output of grain of the northeast black earth area is the most important commodity grain base in our country, but not for most people to understand the serious fact is that support the food production of black soil layer is decreased by 50% in the past more than half a century, and continued to become thinner, hundreds of years to form a centimeter of black soil layer is disappearing at an annual rate of nearly a centimeter. According to the speed and part of the black soil layer or will disappear in a few years later, the northeast China's largest granary capacity will also suffer irreparable loss. Soil in "black soil layer thinning, is refers to the effective arable layer thinning, directly results in the decrease of support grain production capacity, organic matter content, soil fertility decline." Northeast institute of geography and agricultural ecology, Chinese academy of sciences researcher Han Xiaozeng assert that this is bound to affect our country food security. Obviously, this is a problem that nots allow to ignore. Soil heavy metal pollution for a long time, the city is carrying out security situation in farmland environment quality survey, will be fully clear farmland soil heavy metal pollution situation, according to the result of the census and blocks. Soon after, the city of arable land, plant pollution situation will be changed. Soil heavy metal single pollution index of less than 1 food crop area is divided into suitable area, to ban all may result in soil pollution substances to enter; Single contaminate index of heavy metals in soil between 1 ~ 3 food crop area is divided into the warning area, oil crops, corn, potatoes, such as patience food crops resistance; Single soil heavy metal pollution index in 3 more edible crop area is divided into the forbidden area, it is forbidden to eat crops. Will be adjusted in according to the census and crop planting structure layout.
Daily use of battery there are a lot of heavy metal pollutants, cadmium, mercury, manganese, etc. Abandoned in nature, these toxic substances slowly spilled from the battery, into the soil or water, again through the crops into the human food chain into the human food chain. These toxic substances in the body will be difficult to rule out long-term savings, damage the nervous system, hematopoietic function, kidney and bone, some still can cause cancer. To evictions just one night, a week is going to rise, only when the tax a month; Forbidden to eat shark's fin will be three years, the public property for decades has been deaf; Water pollution is a state secret, index of air is a state secret, soil pollution is a state secret, three consumption is a state secret, official residence is a state secret, official passports is a state secret, officials property is a state secret, even naked official information of his wife and children of China's state secrets is soil pollution is increasingly severe situation, prevention and control of the situation is very serious. "Over the years, vice director of China's soil, a researcher at the Chinese academy of agricultural sciences professor Zhang Weili has been focused on the problem of soil pollution" the characteristics of soil pollution in our country present a kind of very complex, new and old pollutants coexist, mixed inorganic organic pollution situation. "Most of the water is seriously polluted, also often appear severe air pollution. Moreover, because of chemical fertilizers and pesticides, and industrial pollution emissions and other reasons, the national within the scope of the most significant or polluted soil pollution. Due to all kinds of pollution, cancer and other malignant diseases in parts of sharply concentrated outbreak.
Cadmium, a heavy metal, chemical elements in the periodic table sorting 48. In nature, it as a compound found in minerals, after entering the human body harm is great. Winter wind, in order to prevent dust pollution park drainage, go against the first biennial long fish, st Regis property second branch company to protect sea embellish international apartment park pool. "Is the most important quality of cultivated land protection laws and regulations is not perfect, as the main body of cultivated land use farmers lack of protection of cultivated land quality initiative." , deputy director of the soil and fertilizer institute, Chinese academy of agricultural sciences', vice director of China's soil degradation of black soil Zhang Weili words embody the mystery, since the 1980 s in our country rural farmland into a one mode of operation, decrease of cultivated land management unit, the use change frequently, farmers to protect arable land, lack of motivation "kind of a few years later, it is not his own, who is also willing to commit to protect?" The increase of heavy metal pollution, use of pesticides, fertilizers, and cause the loss of soil organic matter content, soil harden, resulting in a decline in agricultural output and quality. The ministry of agriculture national agricultural technology center senior agronomist Chen Zhiqun thinks, soil pollution caused by pesticide, fertilizer and industrial, food production every year so 10 billion kg in our country.
The environmental protection department estimates, the country because of the heavy metal pollution of grain a year up to 12 million tons, caused the direct economic losses of more than 20 billion yuan. Number of Chinese patients with chronic diseases increase at an annual rate of more than 300, some experts believe that the main reason is that food safety problems. China has 7% of the arable land on earth, but in the use of chemical fertilizers and pesticides is 35% of the global total. MAO yushi, think about it, should abandon the existing high pesticide, chemical fertilizer, high residue, high pollution of agricultural production, the promotion of environmental protection and ecological agriculture realize sustainable utilization of resources. Outside the cadmium rice in the problem that there are other heavy metal exceeds bid. Earth chemistry, Chinese academy of sciences, researchers reported that published a paper, the main channel to China's inland residents intake of methyl mercury is rice, instead of fish. As is known to all, methyl mercury is one of the famous public nuisance disease of minamata disease.
Mercury, cadmium, lead, arsenic, chromium, five kinds of heavy metal is known as heavy metal "ruling", has a fatal harm to people. Suzhou environmental science research institute Yang Jide said. "these pollution affect child development, make the person disease, cancer, endanger human life and health." Appeared in the 1970 s, Japan "pain pain disease", is caused by the cadmium to the human living environment pollution, the influence is very wide, many victims, so is acknowledged as the "pollution". A complete food pollution chain has for several years. Blossoming in the process of China's rapid industrialisation behavior such as mining, make originally in the form of compounds of harmful heavy metals such as cadmium, arsenic, mercury released into the nature. Through the water and air, these harmful heavy metal pollution in the China a considerable part of the land, and pollute the rice, and then enter the body. Facing the enterprise illegal sewage, some local governments become the umbrella of the enterprise, a fine line, through flexible policy even green light, eventually dwindle, consequence. Protecting the environment is not polluted, it is the legal responsibility of the governments at all levels. Contamination around environmental protection consciousness weak, exposed the lack of government supervision, is a disgrace to the whole society.
After it was heavy metal pollution soil once beyond repair, only through control and management to reduce the heavy metals in the soil "vitality". "Survey in 2007 and put forward the" 10% of commercial rice cadmium problems "of nanjing agricultural university professor Pan Genxing tells a reporter," can't completely degradation of heavy metals in the soil, "not only pollution, but also in the spread of the transfer." Pan Genxing said, at present, our country emerged in the soil pollution of toxic chemicals and heavy metals pollution from industry to agriculture, from urban to rural, from surface to underground transfer, transfer from upstream to downstream, the trend of soil and water pollution to food chain transfer and accumulation of pollution is gradually evolved into pollution accidents frequently broke out. Only from the 'activities' to' inactive '. Heavy metal combined with some material will lose activity, therefore, fixed method of heavy metals has two kinds: one is that with the organic combination of molecular structure will tend to be stable; 2 it is to guide the heavy metals and minerals in the soil, the combination of precipitation of minerals. "
Soil problems and the stomach problems; Water problems, liver problems; Air out of the question, lung problems. Why is gastric cancer, liver cancer, lung cancer showed a trend of rising? Because of the soil, air, water is a problem with the current mainstream soil remediation technologies have a dozen, chemical stability because of its efficient security and become one of the major repair technology, the developed countries have adopted stabilization technology projects accounted for the proportion of all soil pollution repair projects above 30%. Pollution has caused a substantial reduction in the beneficial bacteria in the soil, soil degradation, self-purification ability is abate, affect the yield and quality of crops, endanger human body health, appear even environmental risk retaliation. |
