长江口水体中取代芳烃类污染物的生态风险评价  

ECOLOGICAL RISK ASSESSMENT OF SUBSTITUTED AROMATIC HYDROCARBONS IN WATER OF YANGTZE RIVER ESTUARY

作　　者：庞智勇[1,2] 冯流[1] 周俊丽[2] 刘征涛[2] 

机构地区：[1]北京化工大学化学工程学院,北京100029 [2]中国环境科学研究院国家环境保护化学品生态效应与风险评估重点实验室,北京100012

出　　处：《环境化学》2011年第2期430-434,共5页Environmental Chemistry

基　　金：国家重点基础研究发展计划(973)项目(2003CB412401);中国环境科学研究院中央级公益性科研院所基本科研业务专项(2007KYYW11)

摘　　要：通过对采集于长江口水体15个不同采样点水样中的主要6种取代芳烃类化合物的浓度分析,依据3个基础营养级水平(藻、溞、鱼)的急性毒性效应〔L(E)C50〕,采用欧盟适用于现有化学物质与新化学物质的风险评价技术指南(TGD)中的商值法对长江口水体中的1,3二-氯苯、1,4二-氯苯、1,2二-氯苯、六氯苯、2,4二-硝基甲苯、1,2,4三-氯苯进行了生态风险评价.结果表明,6种取代芳烃除1,2,4三-氯苯外的环境浓度/无影响浓度(PEC/PNEC)都小于1.说明长江口水体中6种取代芳烃只有1,2,4三-氯苯存在一定生态风险,其余均未对长江口生态造成威胁.Concentration analysis was performed for six substituted aromatic hydrocarbons in water samples from 15 different sites of the Yangtze River Estuary.In addition,the acute toxic effects（L（E）C50） was analyzed from three basic levels of aquatic organisms（alga,daphnia magna and fish）.Based on this,the quotient method from the Technical Guidance Document（TGD） on Risk Assessment of Chemical Substances by the European Union was adopted to assess the ecological risk of 1,3-dichlorobenzene,1,4-dichlorobenzene,1,2-dichlorobenzene,hexachlorobenzene,2,4-dinitrotoluene,1,2,4-trichlorobenzene in water of the Yangtze River Estuary.The results showed that the quotient of PEC/PNEC of 1,2,4-trichlorobenzene was higher than 1 and those of the others were lower than 1.This indicated that the six substituted aromatic hydrocarbons except 1,2,4-trichlorobenzene did not cause serious pollution to the Yangtze River Estuary ecosystem.

关 键 词：长江口 取代芳烃 生态风险评价 

分 类 号：X826[环境科学与工程—环境工程]