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 tidalflat sediments by GCECD with 63Ni. The concentration tendency of the PCBs is in hightidal flat >in middletidal flat >in lowtidal 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 hightidal flat.The conclusion was attained that PCBs concentration in sediments of the Changjiang Estuary tidalflat(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.
出处
《海洋环境科学》
CAS
CSCD
北大核心
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)
关键词
长江口潮滩
沉积物
多氯联苯(PCBs)
空间分布
Changjiang Estuary
tidal-flat sediments
Polychlorinated biphenyls
spatial distribution
