摘要
以我国南方某典型化工污染场地为研究对象,通过场地调查确定了研究区的主要污染物为六六六、苯、氯苯和二氯丙烷,并进一步分析了污染物在土壤和地下水中的分布特征。污染物在土壤中浓度主要以生产车间为中心向四周逐渐减小,浓度梯度较大;在垂向上已穿透潜水层,浓度峰值出现在潜水层的中下部。污染物在潜水层中的分布呈现出和土壤中相似的特征,并表现出向南迁移的趋势。污染物在承压水层中的浓度峰值点与土壤和潜水重合,受区域地下水流向的控制,呈现明显向北迁移的趋势。由于地表较厚亚黏土的存在,增强了承压水的防污性能,污染物主要被截留于亚黏土中。
In South China,a typical chemical pollution site as the research object,through the site investigation,the main pollutants in this area were determined including hexachlorocyclohexane two of benzene,chlorobenzene and dichloropropane,and further analysis of the distribution of contaminants in soil and groundwater were carried out.The concentration of pollutants in the soil was gradually reduced from the center of the production workshop to the surroundings in a large gradient.In the vertical direction,the depth of the phreatic water was penetrated.The distribution of pollutants in the phreatic water layer was similar to that in the soil and showed the trend of southward migration.The peak concentration of pollutants in the confined aquifer was coincident with the soil and phreatic water,which was controlled by the direction of groundwater flow in the region,showing the trend of northward migration.Because of the existence of thick clay,the anti-pollution performance of confined water was enhanced.
出处
《油气田环境保护》
CAS
2017年第1期21-24,共4页
Environmental Protection of Oil & Gas Fields
基金
国家重大水专项课题"城区水污染过程控制与水环境综合改善技术集成与示范"(2012ZX07301-001)
中联环SWMES教育部重点实验室开放基金资助(No.SWMES 2015-06)
关键词
化工污染场地
土壤
地下水
污染特征
chemical contaminated site
soil
groundwater
pollution characteristics
