长江口潮滩沉积物中PCBs及其空间分布  

Spatial distribution of PCBs in the sediments ofChangjiang Estuary tidal-flat

作　　者：陈满荣[1] 俞立中[2] 许世远[2] 封克[1] 韩晓非[2] 

机构地区：[1]扬州大学农学系,江苏扬州225009 [2]华东师范大学资源与环境学院,上海200062

出　　处：《海洋环境科学》2003年第2期20-23,共4页Marine Environmental Science

基　　金：国家自然基金资助项目(49871068)

摘　　要：应用具63Ni电子捕获检测器的气相色谱仪,分析了长江口潮滩沉积物PCBs,及其在不同微地貌单元的分布趋势:高潮滩>中潮滩>低潮滩,PCBs与TOC存在线性相关关系,并与>63μm的颗粒物体积百分含量呈显著线性相关关系,推测沉积物中PCBs以低氯同系物为主。大型排污口附近、水动力弱的高潮滩PCBs相对富集。比较国内外不同地区,本区PCBs污染并不严重,但检出率为100%,新生沙岛九段沙潮滩同样检出PCBs污染,因此应当密切关注长江口潮滩环境中PCBs污染的发展。PCBs pollutants were measured on Changjiang Estuarine tidalflat sediments by GCECD with 63Ni. The concentration tendency of the PCBs is in hightidal flat >in middletidal flat >in lowtidal flat .There are linearity between PCBs vs. TOC and >63μm particle percentage(V/V). The low chlorinated congeners are more important than the high chlorinated congeners in this area. PCBs prefer to accumulate in the sediments near sewage outlet and hightidal flat.The conclusion was attained that PCBs concentration in sediments of the Changjiang Estuary tidalflat(10.7～28.6ng/g, dry weight)is less seriously than the most of other areas in the other world areas .But the detected ratio is 100%, even the Jiuduansha shoal detected PCBs, so much attention to this area for PCBs should be paid.

关 键 词：长江口潮滩 沉积物 多氯联苯(PCBs) 空间分布 

分 类 号：X142[环境科学与工程—环境科学]