Changzhou poison pollution up to 50 years of urban planning did not mention
beijingqingnianbao· 2016-04-21 11:10:26
4 month 17, CCTV exposure Changzhou Jiangsu foreign language school (hereinafter referred to as the "regular") students abnormal events, and then triggered a strong concern in society. The focus of public opinion is that the cause of the students and the reason is only about one hundred meters away from a piece of the "poison". < p > the latest news is that the parents spontaneous students of statistics of physical examination data and update, as of April 20, 2016, has received 683 students of the medical report, which medical data is abnormal 561 people, the number of physical abnormalities accounted for ratio increased to 82%.
yet so far, the focus of the issue has not been relevant government agencies and authorities to respond and answer. This undoubtedly increased the public and often outside the parents of teachers and students of doubt, but also further led to the social public opinion fermentation.
Central Research Group is investigating the Changzhou. Before the conclusion of the introduction, the fact that the indisputable fact is that the drug does exist. The detection of toxic chemical elements in the air, soil and groundwater in the vicinity of the "Chang long block". < p > so, verify the poison in the formation of the history, and the local government of city planning history and verify the overall governance of soil pollution status, has exceeded the ordinary students sickened itself. It relates to life and health of the urbanization construction and the residents of the realistic proposition.
Paomaodilou "poison" history
from the map on the look, and often adjacent to the poison is located in Changzhou City Chengnan industrial concentration zone Tianning District Cha Shan Jie Dao, North Wu Road, South Tonghe, cool road is received on the west, East by Longyou river. This piece of land, with a total circumference of 4 km, with a total area of 1 square kilometers, of which the plant covers an area of about 0.4 square kilometers.
these areas belong to the two level of protection of the Taihu River basin. 2000 March 20, started the implementation of the provisions of Article 23 of the rules for the implementation of the law on the prevention and control of water pollution: "it is prohibited in drinking water table secondary sources protection zones for new, expansion to water pollutant emissions of construction projects. Reconstruction projects, must reduce the discharge of pollutants. "< in the region, has existed for a long time former Changzhou Chemical Factory (hereinafter referred to as the" normalization of factory "), Changzhou monosodium glutamate factory (hereinafter referred to as" monosodium glutamate factory "), Changzhou Chemical Research Institute of experimental plant (hereinafter referred to as" the factory) chemical enterprises.
"in the factory relocation, we have done the sampling survey, the soil to plants, fish, earthworms and other ecological environment, the results show that the ecological toxicity. "In 2007, a researcher at the time of the relocation of the sampling survey said.
"Changzhou chemical plant is an important chemical and pesticide factory in China, the history of its organic chemical products and pesticide production is 50 years. In the production process of products, due to the products, raw materials, auxiliary materials and other pollutants to run, run, drip, leak, within the soil has been seriously polluted, through on-the-spot investigation identified the main pollutants in the study area for the BHC, benzene, chlorobenzene and dichloro propane. In 2011, a Tsinghua University scholar in the sampling survey of the poison has been carried out.
the area of the scholars study, including Chang factory, monosodium glutamate factory, experimental plant three factory and some residential areas, a total of 1 square kilometers, plant area of 0.4 square kilometers. Often plant chlor alkali plant in 1958 and relocated to the land, long-term chlor alkali production and its derivative products, pesticides, disinfectants and related products, until 2007 moved; often resin plant was built in 1972, products, including polyvinyl chloride, polystyrene, epoxy series organic chemical products, the factory in 1994 was often factory annex, become the normalization of factory of a workshop. Monosodium glutamate factory was founded in 1962, mainly the production of MSG, chicken essence. Experimental factory was founded in 1958, products related to multiple categories, chemical, textile, printing and dyeing and other additives, the factory in the late 1990s incorporated into Changzhou Chemical Research Institute Co., Ltd., changed its name to Changzhou Chemical Research Institute Experiment Factory, product in textile printing and dyeing auxiliaries. < p > the scholar's research found that often of plant in 1958 began to R & D, production, industrial BHC raw powder, has four different locations in chlor alkali plant to build the BHC pesticide production workshop, which the old workshop production time for up to 15 years.
plant of the 666 production plant in the production process has occurred 666 original powder leakage accident. In the sixties and seventies of the 20th century, often of plant old 666 workshop had happened many times industrial benzene leak accident, a maximum leakage rate of less than 10 tons / time, industrial benzene leakage through the open ditch system directly into the Datonghe. Benzene is a by-product of the production process of 666 raw powder, the 666 production workshop in the factory has also occurred in the production process of Benzene Leakage accident.
after the relocation of the legacy of the
although often plants, monosodium glutamate factory and the factory in 2007 to move out, but highly toxic substances has entered the soil.
2008. An article published papers on "environmental monitoring and toxicological magazine to describe, this poisoned the soil, of different kinds of animals and plants are toxic and pesticide factory relocation sites of soil pollution is more serious. By chemical method for analysis of the soil samples of volatile organic compounds (VOCs) and persistent organic compounds, results show that the soil at the site inspection of volatile organic compounds (VOCs) more, including a variety with strong carcinogenicity of polycyclic aromatic hydrocarbons (PAHs).
2011. After the aforementioned Tsinghua University scholar research, to the poison of the monitoring results are as follows: each of the major pollutants detection for: BHC (96.9 mg / kg survey maximum) and benzene (17.3 mg / kg), chlorobenzene (184 mg / kg), dichloro propane (1230 mg / kg) etc..
"these three substances in the underground 7 meters, monitoring the concentration is very high. BHC in depth is 7 meters place concentration is much higher than other sampling horizon, with increasing sampling depth, BHC concentration detected increased gradually, until the roof of confined aquifer; benzene and distribution of BHC similar. "The scholar described in his paper.
2012, Changzhou City Environmental Science Research Institute researcher Chen Lina in the Journal of agro environment science "published the article the organic chlorine pesticide contaminated groundwater pumping test paper". Her research is Changzhou local organic chlorine pesticide factory.
Chen Lina refused the first Financial Daily reporters on the phone. < in the four years ago the, said test used in pumping wells dug the well depth is 20 meters, 72 hours uninterrupted pumping. It can be seen that the continuous pumping test process, three wells out water detection out most of the site memory exceeded characteristics of pollutants in: BHC (1658 g / L, the survey maximum), benzene (283000 micrograms / L) and chlorobenzene (56.2 g / L), dichlorobenzene (3477 micrograms / liter), Trichlorobenzene (37.8 g / L).
the paper also believes that the organic chlorine pesticide, such as 666 in the environment with high toxicity, persistence and biological enrichment and other characteristics, human health and ecological environment are seriously harm. So far in (the land) in the environment can still be monitored to different levels of 666.
with the accelerated pace of China's urbanization and industrial transfer, a large number of chemical companies to relocate or shut down, resulting in a large number of contaminated sites to be repaired. Pesticides (such as DDT, HCH, trichloro kill mite alcohol) contaminated sites is the typical and most of the sites in the complex, mixed pollution state, thereby increasing the difficulty of contaminated soil and groundwater remediation work.
urban planning a word did not mention "poison"
often in Longhu street, is a new district center city built-up area.
with the development of the New District of Changzhou, the industrial enterprises in this toxic region gradually moving, the relevant regional land function adjustment for residential and commercial land. In this region of the planning of the EIA report, as well as environmental remediation, the environmental assessment is qualified.
2010 in October, new North District government submitted the Changzhou New District land use overall planning (2006-2020) "draft, in the up to 85 pages of text, describing the new North District of the future will be" the northern part of metro, "the blueprint of Changzhou City, but such a document, not mentioning the content of the remediation of contaminated soils.
2011 in May 31st, the Jiangsu Provincial Department of land and resources in Nanjing, the organization of the experts, the new North District of Changzhou city land use master plan (2006-2020) results were reviewed, the principles agreed to pass the review.
Changzhou Municipal Development and Reform Commission in March 2011, agreed to the new North District land use overall planning. < in the control of construction while, increase urban construction by tapping the potential of the connotation, encourage existing urban construction to the depth of the use, become the year construction land development and measures to deal with. The pollution of land, there is potential. < p > but from March to may 2011, new North District government commissioned original Changzhou municipal environmental protection research the of alleged toxic plots within the soil and groundwater pollution situation of investigation and risk assessment, site investigation and risk assessment results show that the site soil and groundwater environment pollution is heavy, for the commercial development of environmental risk is acceptable, we must repair of contaminated sites.
2013 years of August, Changzhou Environmental Science Research Institute to carry out "Chang Long (Hua Da, Chang Yu) plots" contaminated site soil and groundwater remediation technology program. Determine the route repair technology for soil pollution by "ectopic - resource utilization method for the repair of local and regional isolation" is 6 m above ground pollution soil dug, using existing new dry process cement rotary kiln production device, used as a cement plant raw materials resources utilization, 6 meters below take isolation measures. Remediation of contaminated groundwater using in situ chemical oxidation.
Chen Tongbin, an expert at the Institute of geography of the Chinese Academy of Sciences, said that the above methods are not very reasonable, concentrated in the underground toxic pollutants, in the repair, will be fully exposed.
however, the restoration program is implemented, but also obtained the EIA approval.
soil pollution and health problems in the relationship between the definition of
in the repair process, the number of students often outside the number of sick. < p > Tsinghua University a of environmental science and engineering, scholars believe that "the pollution degree of polluting substances, routes of exposure, exposure dose, the problem of environmental pollution, not an independent problem, need is more logical scientific data to support the environmental pollution and health, but Changzhou currently lack was a more comprehensive resident health survey report. < in the lack of local residents historic health monitoring data, in the end how to analyze the 561. < p > "physical examination abnormalities accounted for 82% of the examinees. The data is the physical examination crowd anomalies were found in the rate, not the incidence rate. And measure the impact of environmental pollution on the health of the population should use the incidence rate. "Chinese Center for disease control environment researcher Shang Qi told reporters.
usually, the students of the disease and health symptoms if related to environmental pollution, the student population will show the disease manifestations and symptoms of the common, as well as the characteristics of the time of onset of aggregation. In simple terms, it is similar to the clinical symptoms and symptoms of the disease, and in a similar period of time have a similar disease and symptoms. "Due to our current environmental health technology level it is difficult to correlate these health problems and environmental pollutants. Thus, it is necessary to control population data were compared to observe the students in a variety of diseases and symptoms of whether anomalies have occurred. Shang Qi said. < p > "health effects of environmental pollution on the population of the decision is a rigorous scientific questions that need thorough investigation and design basis, and obtain the sufficient field investigation data, the comprehensive analysis and research to the conclusion is given. This is a process that takes a certain time. Sometimes even so, it will not get a clear conclusion to. Shang Qi said.