官厅水库及上游河流表层水中水溶态多氯萘的污染现状与分布特征  

Pollution status and distribution characteristics of water-soluble polychlorinated naphthalenes in Guanting reservoir and upstream rivers

作　　者：徐吉根 王晓燕[2] 赵兴茹[3] 李云鹏 刘琳 刘承友 闫旭 姜菁秋 赵高峰 XU Jigen;WANG Xiaoyan;ZHAO Xingru;LI Yunpeng;LIU Lin;LIU Chengyou;YAN Xu;JIANG Jingqiu;ZHAO Gaofeng(Institute of Environment and Sustainable Development in Agriculture,Chinese Academy of Agricultural Sciences,Beijing,100081,China;College of Resource Environment and Tourism,Capital Normal University,Beijing,100048,China;Institute of lakes and ecological environment,Chinese Academy of Environmental Sciences,Beijing,100012,China;River Reservoir Management Service Center of Liaoning Province,Shenyang,110003,China)

机构地区：[1]中国农业科学院农业环境与可持续发展研究所,北京100081 [2]首都师范大学资源环境与旅游学院,北京100048 [3]中国环境科学研究院湖泊生态环境研究所,北京100012 [4]辽宁省河库管理服务中心,沈阳110003

出　　处：《环境化学》2023年第1期94-100,共7页Environmental Chemistry

基　　金：水体污染控制与治理科技重大专项(2018ZX07111-002);中国农业科学院科技创新工程资助。

摘　　要：为探究官厅水库及上游河流表层水中水溶态多氯萘(PCNs)的污染状况与分布特征,采用同位素稀释-高分辨气相色谱-高分辨质谱法对官厅水库及上游河流28个点位的表层水样75种PCNs进行分析.结果显示,22种PCN同类物被检出,其中PCN-1的检出率为100%,PCN-5/7、PCN-14/24、PCN42、PCN-37/33/34、PCN-44/47、PCN-45/36、PCN-27/30、PCN-38/40的检出率均高于80%.不同氯代同类物的浓度百分含量依次为:一氯萘占34.2%,二氯萘占35.9%,三氯萘占20.1%,四氯萘占9.7%,五氯萘占0.1%.表层水样中∑PCNs的浓度为0.31—30 ng·L^(-1),中值为7.5 ng·L^(-1),且中值呈现西库区(9.0 ng·L^(-1))>中库区(8.4 ng·L^(-1))>东库区(6.7 ng·L^(-1))>上游河流(5.6 ng·L^(-1))的趋势.与国内外相关文献报道值相比较,官厅水库及上游河流表层水中PCNs的浓度处于中等水平.PCNs的毒性当量计算结果显示∑PCNsTEQ为0.005—0.187 pgTEQ·L^(-1).污染来源分析结果表明,官厅水库及上游河流表层水样中PCNs可能主要源于钢铁冶炼过程和交通排放.In order to study the pollution status and distribution characteristic of polychlorinated naphthalenes(PCNs)in the surface water samples from Guanting reservoir and its upstream rivers,75 PCN congeners were detected and analyzed by isotope dilution-high resolution mass spectrometry in 28 surface water samples from Guanting reservoir and its upstream rivers.The results showed that 22 PCN congeners were detected,and PCN-1 was detected in all the surface water samples.Other congeners with a detection rate higher than 80%included PCN-5/7、PCN-14/24、PCN-42、PCN37/33/34、PCN-44/47、PCN-45/36、PCN-27/30、PCN-38/40.MoCNs,DiCNs,TrCNs,TeCNs and PeCNs account for 34.2%,35.9%,20.1%,9.7%and 0.1%of PCNs,respectively.ΣPCNs concentration ranges from 0.31—30 ng·L^(-1),with a median value of 7.5 ng·L^(-1).The median concentration showed a trend of West reservoir area(9.0 ng·L^(-1))>middle reservoir area(8.4 ng·L^(-1))>East Reservoir Area(6.7 ng·L^(-1))>upstream rivers(5.6 ng·L^(-1)).Compared with domestic and foreign studies,PCNs content in the surface water of Guanting reservoir and its upstream rivers is at a medium level.Toxicity Equivalent Quantity(TEQ)of PCNs ranged from 0.005—0.187 pgTEQ·L^(-1).The results showed that PCNs in these surface water samples from Guanting reservoir and its upstream rivers are mainly polluted by steel smelting process and traffic emission.

关 键 词：官厅水库 多氯萘 表层水 污染现状 分布特征. 

分 类 号：X52[环境科学与工程—环境工程]