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时间:2018-12-07
《太湖竺山湾及入湖河流沉积物中多氯联苯单体分布及源解析》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、太湖竺山湾及入湖河流沉积物中多氯联苯单体分布及源解析徐磊刘莎秦庆东傅大放金苗许妍东南大学土木工程学院研究所摘要:采用改进后的GC-PECD方法定量测定了太湖竺山湾及入湖河流(太溻运河、漕桥河、殷村港和社渎港)16个表层沉积物中209种多氯联苯(PCBs)单体浓度,并对其分布特征进行了探讨.结果表明,在16个采样点共检测出115种多氯联苯单体,SPCBs浓度在11.0284.05ng/g(干重)之间,整体呈现出殷村港〈漕桥河〈社渎港〈太滿运河〈竺山湾的趋势,平均浓度为26.42ng/g(干重).沉积物中多氯联苯平均组成以一氯和二氯联苯为主,质量百
2、分含量分别为34.26%和23.19%;其次是三到六氯联苯,占比依次为14.86%、6.76%、7.37%、9.61%;七到十氯联苯含量最低,质量百分含量总计仅有3.95%.同吋,利用主成分分析方法对表层沉积物屮的多氯联苯污染进行丫源解析.结果显示,表层沉积物屮的多氯联苯主要来源于附近泄漏的电容器、变压器油以及油漆、造纸等行业的排放污水,与多氯联苯商业产品Aroclors系列有较大差别.通过毒性当量因子法和加拿大沉积物环境质量标准评价法对研究区域生态风险进行分析,显示太湖竺山湾及4条入湖河流沉积物中多氯联苯污染的生态风险不容忽视.关键词:太湖;
3、沉积物;多氯联苯;单体;源解析;作者简介:徐磊(1993-),男,江苏如皋人,东南大学土木工程学院硕士研究生,主要从事有机污染物的微生物修复研究.作者简介:许妍副教授,xuxucalmm@seu.edu.cn收稿日期:2017-04-16基金:国家自然科学基金资助项目(41671468,41301546,51408119)DistributionandsourceapportionmentofpolychlorinatedbiphenylcongenersinsurfacesedimentsfromZhushanBayandtheinflowr
4、iversofLakeTaihuXULeiLIUShaQINQing-dongPUJINMiaoXUYanSchoolofCivilEngineering,SoutheastUniversity;NanjingInstituteofGeographyLimnology,ChinaAcademyofSciences;Abstract:Theconcentrationsof209polychlorinatedbiphenylcongenersin16surfacesedimentscollectedfromZhushanBayandtheinflo
5、wrivers(TaigeCanal,CaoqiaoRiver,YincunRiverandSheduRiver)ofLakeTaihuweredeterminedbyamodifiedGC-uECDmethodandthedistributioncharacteristicswerediscussed.Resultsshowedthat115PCBcongenersweredetectedandtheconcentrationsoftotalPCBsrangedfrom11.02ng/gto84.05ng/g(d.w.)atthe16samp
6、lingsites.Ingeneral,thetotalPCBswereYincunRiver7、,tri-tohexa-chlorobiphenylsaccountedfor14.86%,6.76%,7.37%and9.61%,respectively.Thelowestwerehepta-toocta-chlorobiphenyls,whichonlyaccountedfor3.95%intotalmass..Meanwhile,sourceapportionmentofPCBsinthesurfacesedimentswasconductedbyprincipalcomponentanalysis(PCA),whichrevealed8、thatPCBsinthesedimentsoriginatedmainlyfromleakageofcapacitor,transformeroil
7、,tri-tohexa-chlorobiphenylsaccountedfor14.86%,6.76%,7.37%and9.61%,respectively.Thelowestwerehepta-toocta-chlorobiphenyls,whichonlyaccountedfor3.95%intotalmass..Meanwhile,sourceapportionmentofPCBsinthesurfacesedimentswasconductedbyprincipalcomponentanalysis(PCA),whichrevealed
8、thatPCBsinthesedimentsoriginatedmainlyfromleakageofcapacitor,transformeroil
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