南四湖沉积物中二噁英类化合物的分布  

CONGENER DISTRIBUTIONS OF DIOXIN-LIKE COMPOUNDS IN SEDIMENTS FROM THE NANSI LAKES,CHINA

作　　者：杨永亮[1] 史双昕[2] 潘静 李红莉[4] 李国刚[5] 高虹[4] 周成[4] 李悦[2] 石磊[2] Kevin Jones 

机构地区：[1]中国科学院广州地球化学研究所,广州510640 [2]青岛大学环境科学与工程系,青岛266071 [3]青岛市环境保护监测站,青岛266003 [4]山东省环境监测中心站,济南250013 [5]中国环境监测总站,北京100029 [6]英国兰卡斯特大学环境科学系

出　　处：《环境化学》2004年第5期549-555,共7页Environmental Chemistry

基　　金：中国科学院广州地球化学所有机地球化学国家重点实验室开放基金资助

摘　　要：用1 3C同位素内标法 ,高分辨率气相色谱 高分辨率质谱对南四湖表层沉积物中 1 7种含 2 3 7 8 氯代二苯并二英 /呋喃 (PCDD/Fs)及 1 2种共平面多氯联苯 (Co PCBs)的含量、同系物异构体的分布特征、沉积通量、毒性当量及来源进行了初步分析 ,并与山东近海 (日照、烟台、青岛 )的测定结果进行比较 .总Co PCBs含量分别为 5 4 4pg·g- 1 dw (南阳湖 )和 41 4pg·g- 1 dw (微山湖 ) .总PCDD/Fs含量分别为 1 0 6 7pg·g- 1 dw (南阳湖 )和1 47 0pg·g- 1 dw (微山湖 ) .两湖含 2 3 7 8 PCDD/Fs异构体对总毒性当量浓度的贡献基本相同 ,即以四—五氯代异构体为主 .PCDD/Fs含量次序为青岛 >日照 >南四湖 >烟台 .南四湖、日照、烟台近海沉积物中的PCDD/Fs对总TEQ (PCDD/F TEQ +PCB TEQ)的贡献为68 8%— 93 0 % .南四湖与山东近海沉积物中PCDDs/PCDFs比值和OCDD %∑百分比表明 ,山东省PCDD/Fs的来源较为一致 ,相对恒定 .除河口处外 ,大气沉降应是南四湖及山东近海PCDD/Fs的主要来源 .This work presents preliminary results on the concentrations,congener distribution characterise,sedimentation fluxes,TEQs and sources of 17 polychlorinated dibenzo-p-dioxins,dibenzofurans(PCDD/Fs)and 12 coplanar polychlorinated biphenyls (Co-PCBs)in sediments from the Nansi Lakes determined with HRGC-HRMS and comparisons with the coastal seas of Shandong Peninsular,China,(Qingdao,Rizhao and Yantai Coastal Seas).The total Co-PCBs contents are 54.4pg·g -1 dw for Nanyang lake and 41.4pg·g -1 dw for Weishan lake,respectively.The total PCDD/Fs contents are 106.7pg·g -1 dw for Nanyang Lake and 147.0pg·g -1 dw for Weishan Lake,respectively.The relative contributions of The ∑2378-substituted PCDD/Fs to the total TEQs(PCDD/Fs-TEQ+PCB-TEQ)are similar for Nanyang lake and Weishan lake,68.8% and 93.0%,respectively,dominated by tetra and penta-chlorinated congeners.The total PCDD/Fs concentrations of in sediments decrease in the order of:Qingdao>Rizhao>the Nansi lakes>Yantai.Except for the river mouth,the atmospheric precipitation is likely the main source of PCDD/Fs in theses areas as evidenced by the relatively constant,consistent PCDDs/PCDFs ratios and OCDD %∑.

关 键 词：PCDD 含量 类化合物 烟台 比值 异构体 测定结果 二噁英 毒性当量 南四湖 

分 类 号：X52[环境科学与工程—环境工程]