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Hexavalent chromium plating plant in Tangshan City,[link widoczny dla zalogowanych], Village Wastewater on Groundwater Contamination

NC were detected in the number of shares that the number of detected number of shares 9O ・ degrees,[link widoczny dla zalogowanych], well above the natural water content. Show that the groundwater has been polluted to varying degrees. Their pollution by the waste water runoff, ditch set,[link widoczny dla zalogowanych], seepage pits,[link widoczny dla zalogowanych], infiltration and rainfall infiltration wells and other migration, drum sewage directly into the aquifer and other means to cause the A,[link widoczny dla zalogowanych], 2. Hexavalent chromium detected in the mean detection rate and the increase with a decreasing water depth and decreasing trends. Less than 50 meters and 50 meters above the relatively poor detection rate of two larvae cut was significant (x2 = 3.866.P <0.05). Vulnerable to contamination than shallow wells that deep, in line with the general pollution law I3. The detection rate of fish out away from the pollution of the mean Ai understanding with water decreased with the increasing distance, the statistical treatment, there were significant differences 01, F-hi 5.066, P <0.01). Further detection means pairwise comparison and found that 0 to 40 meters and 40 meters from each group. Are very significant differences. This may be due to water pollution from the close, short distance transport of pollutants. Retention is poor. Due to the weak self-purification. 700 meters away from the pollution of water sources other than Ai, Environment and Health is also not detected hexavalent chromium, we believe that as a safer water source protection zone; 4. Hexavalent chromium plating plant detection and time-related production. Put into operation more than a decade, can be extended to 3 ∞ meters away, that hexavalent chromium wastewater into the environment after A. President of the room can not eliminate the well can be spread long distances, within a certain range of time with the electroplating factory production increased. Trend of gradually expanding the scope of pollution. That is, the operation between the long resistance, the more the cumulative amount of pollution, pollutant migration, the less funny. Prompt us to put into operation Ti electroplating factory length, also contribute to the hexavalent chromium contamination of groundwater can not be neglected the original difficulties. Proposed to strengthen the electroplating factory management, the reform process update the equipment, the utilization of pricey chromic acid anhydride, improving wastewater treatment facilities, discharge standards, new water wells should be as far as Oi deep well away from sources of pollution, to prevent the vertical, flat ring infiltration of surface erosion of blink water pollution, health hazards of cosmetics with the investigation into the incident in November 1989 0 ~ l1 days, Zhuzhou City factory uniform payment to the base in Shanghai factory workers at chemical plant in a high-level double-effect cream color. From 10 onwards with a staff of the hospital. Reflecting paint the skin after using the cream adverse reactions. To this end, in December l ~ 12 date in the survey. Sample survey of the i196 staff and workers. Found. Paint off with the United States and 26.5 Pa cries of people have adverse reactions. Paint used mainly as part of skin Shatter Xiang, swelling redness, pimples, burning. There are a few tenderness, pus, pain, black spots and other scales. And the responsiveness of these symptoms are not the same, the number of towns reactions occur 1 to 2 symptoms, and some reactions occur 3 to 4 symptoms, less than 5 London has emerged a serious reaction. Positive Can not but lead to relevant departments. Straight hair department manufacturers protect people in a cheaper body and health purposes. Strengthen health management. Strictly self-test. Taiwan is prohibited or cell products manufactured with the theme; business units should earnestly implement the health permit 'system to prevent shoddy goods, animal husbandry, housing eight of the market. The health sector should strengthen health supervision. To prevent similar accidents happening again. Forward, Qinfeng Xiang Tan Vegetable Residues in the 666 to stop the production and use of pesticides BHC for several years but because of its long residual period of limitation. Environment, there are still trace sixty-six weapons. To understand the Xiangtan City suburb of South HCH residues in vegetable production, we in l986 ~ 1987 within two years, state District 4 township 20 varieties of vegetables, three samples tested (June 1986 In 1987 September and 12 months), of which 11 kinds of vegetables. 0 kinds of leafy vegetables. A total of 33 samples. HCH by gas chromatography 0.2mg/kg content evaluation results according to national standards. 33 samples the average concentration of HCH 0.0057mgAg ・ ten fish out of 28 BHC. The detection rate was 84.85, then the range of 0.000 | ~ 0.0360mg/kg. An average of 8 samples in 1986 with 6660. O20gmg/kgIl987 average of 25 samples with 6660. o0ogmg/kg. BHC 987】 vegetables was significantly lower than l986 years (t-chang 7.24.P <0. Call it). Two years, the average content of three samples were 0.0209,0.00 | 3,0. OOO3mg/kg, trapezoid decreasing. HCH residues in vegetables in our city did not exceed the state allows the scope of its residual shame with the increase of the number of reduced tillage. Xiaoxue Cheng Pei Hanjie
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