焦化厂周边土壤—玉米系统重金属污染风险评价  

Risk Assessment of Heavy Metal Pollution in the Agricultural Soil-Maize System of the Coking Plant Area

作　　者：刘子姣[1] 范智睿 LIU Zijiao;FAN Zhirui(College of Resources and Environment,Shanxi Agricultural University,Taigu 030801,China)

机构地区：[1]山西农业大学资源环境学院

出　　处：《山西农业科学》2019年第11期1995-1998,共4页Journal of Shanxi Agricultural Sciences

摘　　要：为了解焦化厂周边土壤重金属污染现状,在太谷县某焦化厂周边采集土壤样品和玉米样品各30份,分析测定土壤和玉米籽粒中重金属元素的含量以及土壤pH值,并进行生态风险评价及健康风险评价。结果表明,该地区潜在生态风险指数最高的是Hg元素,其污染达到了中等危害水平,其他重金属元素的污染均处于轻度危害水平;焦化厂附近居民经玉米途径摄入的单一污染元素对人体健康的损害风险并不大;Pb、As、Hg、Cr、Cd这5种重金属污染叠加后对成人和儿童的总危害指数分别是0.0017和0.0010,5种重金属元素中As的贡献率最高,达到70.4%。To learn the current situation of the heavy metal pollution of the maize soils around coking plant in Taigu county,30 soil samples and 30 maize samples from the soils were collected,and the concentrations of Cd,Cr,As,Hg,Pb,Cu,Zn,Ni and soil pH were measured,then an ecological risk assessment and a health risk assessment were made.The results showed that the highest value of potential ecological risk index in this area was Hg element,and its pollution reached the level of medium harm,the pollution of other heavy metal elements was at the level of slight harm.The risk of single pollution element ingested by the residents near the coking plant via corn was not high,and the hazard indexes to adults and children caused by the combination of Pb,As,Hg,Cd and Cr were 0.0017 and 0.0010,respectively.As had the highest contribution rate among the five heavy metal elements,reaching 70.40%.

关 键 词：焦化厂 土壤—玉米系统 重金属 生态风险评价 人体健康风险评价 

分 类 号：X53[环境科学与工程—环境工程]