土壤-水环境系统有机氯农药垂直分布与迁移特征  

Vertical Distribution and Transport of OCPs in Soil-Water Environmental System

作　　者：瞿程凯[1,2] 邢新丽[1,2] 刘佳[1,2] 李丰[1,2] 张原[1,2] 祁士华[1,2] 阚泽忠[3] 

机构地区：[1]中国地质大学(武汉)环境学院 [2]中国地质大学(武汉)生物地质与环境地质国家重点实验室,湖北武汉430074 [3]四川省地质调查院,四川成都610081

出　　处：《环境科学与技术》2013年第11期44-48,共5页Environmental Science & Technology

基　　金：中国地质调查局地调项目:四川省成都经济区区域有机地球化学(有机氯农药)调查项目;高等学校博士学科点专项科研基金:盆地-山区持久性有机污染物的长距离迁移模型研究(20090145110004)

摘　　要：分析了四川绵竹和盐亭垂直剖面不同深度土壤和不同形式及用途的水体样品中有机氯农药(HCH和DDT)含量分布特征。HCH和DDT异构体比值关系分析表明,研究区主要为历史残留。在地表有机质含量高的土壤中,随深度增加有机氯农药含量减少;地表为砂土的土壤柱,有机氯农药随土壤优先水流进入深层土壤。有机质、土壤结构和孔隙度可能是影响土壤有机氯农药吸附的重要因素,土壤优先水流强弱会影响有机氯农药在垂直方向迁移。研究区地下水有机氯农药含量均在国家生活饮用水质量标准范围内,地表水中有部分样点超标。为了人体健康,应使用水质相对较好的地下水或对地表水集中或分散处理后再饮用。Vertical soil samples and water samples of different usages and existing forms were collected in Mianzhu and Yanting in Sichuan Province,and the concentration of organochlorine pesticides（OCPs） such as HCHs and DDTs were determined. The composing ratios of HCH and DDT isomers indicated the pesticides in study area were mainly historical residues. In soil core with surface soils of high organic matter,the concentrations of OCPs decreased as the depth increasing.And in soil core with sandy surface,OCPs was transported into deeper soil layers by the soil priority current. Organic matters,soil texture and voidage may be important factors that affect the soil adsorption of OCPs,and soil priority current is a key item for vertical transport of OCPs. The groundwater quality in study area generally conforms national standards for drinking water quality,however some surface water samples are beyond the criterion. To protect the health of people,effective water treatment of the surface water in study area is recommended for drinking purpose.

关 键 词：土壤 水 有机氯农药 垂直分布 迁移 

分 类 号：X131.3[环境科学与工程—环境科学]