摘要
以广东某氯碱场地为研究对象，采集了土壤和地下水共22个样品。结果表明：（1）氯碱场地土壤中特征污染物主要为六六六、四氯化碳、三氯甲烷、六氯苯、苯等，主要分布于堆场、四氯化碳车间、漂水车间等。（2）煤场与锅炉区土壤的铅、镍含量分别为697mg／kg、231mg/kg。（3）四氯化础车间的四氯化碳含量超出标准的207倍；三氯甲烷超出标准760倍；六氯苯含量超出标准62倍；六六六含量超出标准4．78倍。漂水车间2．5m、3m、5m、7m、8m、9m六个不同的剖面均检出了苯，超出标准10倍～20倍。（4）从6个地下水样品来看，部分污染物的含量超过了《地下水质量标准》中Ⅳ类标准。
This research selected a case of a chlor-alkali chemical contaminated site, collected 22 soil and groundwater samples, analyzed 25 pollutants to understand their sources and spatial distribution characteristics of pollutants. The results show the characteristic of contaminants in the chlor-alkali industry in soil were BHC, carbon tetrachloride, chloroform, hexachlorobenzene, benzene and lead, nickel, etc.. Organic pollutants were found in litter yard, carbon tetrachloride workshop and bleach workshop, etc., while inorganic pollutants were found in coal yard, boiler region. （I） The BHC concentrations in litter yard soil samples were 110 times higher than standard level. （2） For the coal yard and boiler region, the highest lead and nickel concentration in soil samples was both exceeding the standard level. （3） In the carbon tetrachloride workshop, carbon tetrachloride concentration is 207 times higher than the standard value, while chloroform exceeds the standard by 760 times, hexachlorobenzene 62 times, and BHC4.78 times. In the bleach workshop, benzene concentrations at six different cross sections （depth of 215m, 3m, 5m, 7m, 8m, 9m） were exceeding the standard by 10 to 20 times. （4） For the six groundwater samples, some contaminants exceed the ＂Groundwater Quality Standards＂ class Ⅳ standard. Overall, higher concentrations of organochlorine residues were found in the chlor-alkali industry historical contaminated sites, especially in the carbon tetrachloride workshop, where groundwater has been polluted.
出处
《生态经济》
CSSCI
北大核心
2014年第8期162-164,168,共4页
Ecological Economy
基金
863计划"挥发性有机物污染场地土壤气堤修复技术设备研发与示范"(2009AA063102)
关键词
氯碱行业
污染场地
土壤
地下水
污染特征
chlor-alkali industry
contaminated sites
soil
groundwater
pollution characteristics
