苏南地区表层土壤中多氯萘的浓度及来源  

Concentration and source of polychlorinated naphthalenes in surface soils from the South of Jiangsu

作　　者：薛令楠 张琳利 张利飞[2] 史双昕[2] 董亮[2] 李晓秀[1] XUE Ling-nan;ZHANG Lin-li;ZHANG Li-fei;SHI Shuang-xin;DONG Liang;LI Xiao-xiu(College of Resource Environment and Tourism, Capital Normal University, Beijing 100048, China;State Environmental Protection Key Laboratory of Dioxin Pollution Control, National Research Center for Environmental Analysis and Measurement, Beijing 100029, China)

机构地区：[1]首都师范大学资源环境与旅游学院,北京100048 [2]国家环境分析测试中心,国家环境保护二[口恶][口英]污染控制重点实验室,北京100029

出　　处：《中国环境科学》2017年第2期646-653,共8页China Environmental Science

基　　金：环保公益性行业科研专项(201309030);国家重大科学仪器设备开发专项(2011YQ060084)

摘　　要：采用气相色谱-三重四极杆质谱联用技术对苏南地区34个表层土壤中的多氯萘(PCNs)进行了分析测定,并对其组成特征及污染来源进行了研究.结果表明,苏南地区土壤中SPCNs的浓度水平在0.263~2.48ng/g dw之间,除16号采样点PCNs浓度(2.48ng/g dw)显著偏高外,其余各点平均值为0.464ng/g dw,毒性当量(TEQs)的变化范围在0.045~0.157pg/g dw之间,整体处于较低水平.所有样品中PCNs均以一氯代萘和二氯代萘为主,所占比例为39.3%~91.4%.CN-66/67、CN-69和CN-73对该区域PCNs的TEQs值贡献最大,分别为25.6%,29.1%和28.7%.SPCN_(Com)/∑PCNs比值表明,高温燃烧过程对整个苏南地区PCNs的污染影响较大.相关性分析与主成分分析研究表明,老电气设备的使用及交通排放过程也是造成该区域PCNs污染的可能来源.但该地区PCNs污染来源较复杂,各点位PCNs的来源需深入研究.The concentrations,profiles and source apportionment of polychlorinated naphthalenes(PCNs)in34surfacesoil samples from the South of Jiangsu were analyzed by gas chromatograph coupled with a triple quadrupole massspectrometer.Total concentrations of PCNs in all samples ranged from0.263to2.48ng/g dw with an average of0.464ng/gdw except sampling point16,which had the highest concentration of2.48ng/g dw,the TEQs of PCNs ranged from0.045to0.157pg/g dw,indicating a low concentration level.MonoCNs and DiCNs were the most predominant homologues inall the samples,accounting for39.3%~91.4%.The congeners CN-66/67,CN-69and CN-73were the predominantcontributors to the TEQs,accounting for25.6%,29.1%and28.7%,respectively.The ratio ofΣPCNCom/ΣPCNs couldindicate that the high temperature combustion process made great influence to the PCNs pollution in the South of Jiangsu.Correlation analysis and principal component analysis showed that the use of old electrical equipment and trafficemissions might be also the possible sources to the PCNs pollution in this study area.However,the sources of PCNspollution are more complex,which need a further study to determine the source of PCNs in surface soil samples from theSouth of Jiangsu accurately.

关 键 词：多氯萘 表层土壤 苏南地区 来源 

分 类 号：X53[环境科学与工程—环境工程]