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.
出处
《环境化学》
CAS
CSCD
北大核心
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)
关键词
长江口
取代芳烃
生态风险评价
Yangtze River Estuary
substituted aromatic hydrocarbons
ecological risk assessment
