Ministry of Environmental Protection and the Ministry of Land and the 17th jointly issued the "National Survey on Soil Pollution Bulletin." The overall national soil environment is not Cheap Canucks Jerseys optimistic, heavy soil pollution in some areas, cultivated soil environmental quality worrying, mining and industrial wasteland soil environmental issues outstanding.
survey results show that the country's point total soil exceeding the rate of 16.1%, including mild, mild, moderate and severe pollution point ratio was 11.2%, 2.3%, 1.5% and 1.1%. From land-use types, farmland, woodland, grassland soils point exceeded rates were 19.4%, 10.0%, 10.4%. From pollution types, with no model-based, there are models, followed by a smaller proportion of complex pollution, inorganic contaminants exceeding the median point of the point total exceeded 82.8%. Situation from excessive pollutants, cadmium, mercury, arsenic, copper, lead, chromium, zinc, nickel eight kinds of inorganic contaminants point exceeding rates were 7.0%, 1.6%, 2.7%, 2.1%, 1.5%, 1.1% , 0.9%, 4.8%; BHC, DDT, polycyclic aromatic organic pollutants in point 3 exceeded the rate of 0.5%, 1.9%, 1.4%, respectively.
2005 年 4 月 至 2013 In December 2009, the Environmental Protection Ministry of Land and Resources jointly conducted the first national survey of soil pollution. Scope of the investigation is land territory, the survey points other than Hong Kong and Macao Special Administrative Regions and Taiwan Province to cover all arable land, part of the woodland, grassland, unused land and construction land, the actual survey an area of about 6.3 million square kilometers.
survey, soil environmental quality by the superposition of multiple factors, soil pollution in the country's economic and social development process of the formation of long-term accumulation. Human activities and natural background values mining and industrial and agricultural production and other high is the main reason causing soil contamination or excessive.
Faced with the grim situation in the soil environment, the state is or will be a series of measures to strengthen environmental protection and soil pollution, soil pollution and resolutely to war. First, the preparation of soil pollution prevention action plan. The second is to accelerate the process of soil environmental protection legislation. Third, further detailed investigation of soil pollution work. Fourth, the implementation of soil remediation projects. Fifth, strengthen supervision of the soil environment.
Interview
Ministry of Environmental Protection and the Ministry of Land and the 17th release of "national soil pollution survey Bulletin" shows the overall national soil environmental situation is not optimistic, worrying environmental quality arable soil, mining and industrial wasteland soil environmental issues outstanding. This reporter interviewed the Ministry of Environmental Protection and the Ministry of Land and other responsible person.
Q: Why have not given area of soil pollution data?
A: relative in terms of water and air pollution, soil pollution with inhomogeneity characteristics, and the slow migration of contaminants in the soil, accurately grasp the distribution of soil contamination with certain difficulties.
The soil survey is a preliminary investigation, with none of the nature of the investigation, the purpose is to grasp the overall situation of the country's soil contamination, by objective conditions, the overall point more sparse. To farmland, for example, every 9.6 acres laid a point, can only reflect the overall situation of China's arable soil environmental quality from the macro. Thus, the survey points to the standard rate to describe soil pollution, soil contamination area provide accurate data has become more difficult.
Q: What caused the main cause of soil pollution?
A: soil pollution in the country's economic and social development is the process of the formation of long-term accumulation, mainly include:
First, exhaust emissions from industrial and mining production and business activities, waste water, waste is causing pollution of the soil surrounding the main reason. Tailings, hazardous waste and other types of solid waste dumps, etc., leading to pollution of the surrounding soil. Vehicle emissions cause traffic arteries on both sides of the soil lead, zinc and other heavy metals and PAHs.
Secondly, agricultural production activities is an important cause of soil pollution of farmland. Irrigation, fertilizers, pesticides, plastic sheeting and other irrational use of agricultural inputs and livestock, leading to soil pollution of farmland.
addition, the cause of the high natural background values of some heavy metals in soil and watershed area exceeded.
Q: What harm soil pollution?
A: First, the impact of agricultural yield and quality. Soil contamination will affect crop growth, resulting in production; crop may absorb and concentrate certain pollutants affect the quality of agricultural products, has brought huge economic losses to agricultural production; Long-term consumption of contaminated agricultural products could seriously harm their health.
two safe living environment is hazardous. Soil pollution in residential, commercial, industrial and other construction sites may also be by oral ingestion, inhalation and skin contact, such as a variety of ways harmful to human health. Contaminated sites without direct control of development and construction, will cause long-term harm to the population concerned.
three threats to the ecological environment is safe. Soil pollution affect plants, soil animals (such as earthworms) and microbial (eg Rhizobium) growth and reproduction, endanger the normal soil ecological processes and ecosystem services, is not conducive to maintaining soil fertility and nutrient transformation, affecting the normal function of the soil. Soil contamination may occur transformation and migration, and then enter surface water, groundwater and atmospheric environment, the impact of other environmental media, may have caused contamination of drinking water sources.
interpretation
on how to ensure the safety of the tongue?
Ministry of Environmental Cheap Flames Jerseys Protection and the Ministry of Land and the 17th jointly issued the "National Survey of soil pollution bulletin" that some areas of soil contaminated Yangtze River Delta, Pearl River, northeast old industrial bases and other issues are more prominent, and these regions is China's major grain producing areas.
expert analysis, grain heavy metals exceeded for several reasons: First, cadmium and other heavy metals in soil high background values. Second, China's nonferrous metals mining history of traditional mining area so far has been a century, long-term mining, metal smelting and industrial wastewater containing heavy metals, waste discharge causing soil pollution. Third, due to climate change, environmental pollution resulting in acid rain increased soil acidification, enhanced under acidic conditions, the activity of soil heavy metals such as cadmium also increases, more easily absorbed by the rice and other crops.
"arable soil contamination revealed the grim situation of China's industrial pollution and agricultural production over the pursuit of speed and quantity, ignore the grim reality of the quality of farmland protection." Secretary-General of the National Federation of Environmental Chamber Luo Jianhua said that for a long time, people only to obtain land, while ignoring the soil protection and restoration. Arable soil contamination related to agricultural safety and public health are closely related, to keep "safe tongue", we must first ensure the safety of the soil.
compared to water and air pollution, soil pollution has a hidden, hysteresis and hard reversible. Since heavy metals are difficult to degrade, resulting in heavy metal contaminated soil is basically a complete reversal of the process can not be. Soil contamination in the event, relying solely on cutting pollution sources is very difficult to recover. Overall, the high cost of governance soil pollution, long cycle, is difficult.
experts said soil remediation is through physical, chemical and biological methods transfer, absorption, degradation and transformation of pollutants in soil. However, due to the complexity of soil pollution, relying on a single method is difficult to repair soil contamination, need to use a variety of techniques, generally require a lot of money and a longer period of time.
number say
soil contamination from the status quo of China's digital watch
number one:
country's total exceeded the rate of soil 16.1%
point exceeded the rate refers to the number of points exceeding the soil survey accounted for the proportion of the total number of points.
exceeded the national rate of 16.1% of total soil, in which the proportion of severe pollution point of 1.1%. Soil pollution with no models based. Southern serious soil pollution in the north. Cadmium, mercury, arsenic, lead, four kinds of inorganic contaminants in the distribution of presents from the northwest to the southeast, from the northeast to the southwest direction gradually rising trend.
figures:
farmland point exceeded the rate 19.4%
point arable soil exceeding the rate of 19.4%, the main pollutants cadmium, nickel, copper, arsenic, mercury, lead, DDT and PAHs. Lin Location bit excessive rate of 10.0%, exceeding the grass place position was 10.4%, and no place bit excessive use was 11.4%.
number three:
soil cadmium exceeded the rate of 7.0%
cadmium, mercury, arsenic, copper, lead, chromium, zinc, nickel and eight kinds of inorganic contaminants point exceeding rates were 7.0%, 1.6%, 2.7%, 2.1%, 1.5%, 1.1%, 0.9%, 4.8%, which cadmium severe pollution point ratio of 0.5%.
BHC, DDT, polycyclic aromatic organic pollutants in point 3 exceeded the rate of 0.5%, 1.9%, 1.4%, respectively.
number four:
heavily polluting enterprises and excessive soil surrounding points 36.3%
in the investigation of 690 heavily polluting enterprises Cheap Nordiques Jerseys land and soil surrounding the point, 36.3% exceeded the point. Industrial wasteland Super punctuation investigators accounted for 34.9%, industrial parks Super punctuation bit 29.4%. Cheap Thrashers Jerseys
figure five:
solid waste disposal site soil exceeding points 21.3%
In the survey of 188solid waste disposal sites, and 21.3% exceeded the point. Super punctuation investigators oil region accounted for 23.6%, mining accounted for 33.4% of the Super punctuation bit, 55 sewage irrigation area in the presence of soil contamination has 39, 267 1578 Super punctuation bit of soil points on both sides of the main highway 20.3%.
edition were excessive pollution of Cheap Devils Jerseys land, according to Xinhua News Agency Type
farmland
19.4%
woodland
10.0%
grass
10.4%
unused land
11.4% (Source: North Morning Network)
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