Qin Yan-wen, Meng Wei, Zheng Bin-hui, Zhang Lei, Su Yi-bing
River and Coastal Environment Research Center, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
Huan Jing Ke Xue. 2006 Feb;27(2):268-73.
Three sediment cores were collected in Nov. of 2003 from Dagu estuary to Qikou estuary. The grain size, TOC and heavy metal contents of core sediments were analyzed in order to study the geochemical characteristics, contamination features and the spatial and vertical distribution characters for heavy metals of tidal zones in Bohai Bay. The grain size of tidal sediments becomes finer from north to south. Ultrafine, fine and power sand are the main compositions in the sediment of Dagu and Duliujian estuary. The sediment of Qikou estuary is mainly composed by power and ultrafine sand. The vertical distribution trends of three sediment cores indicate that the grain-size becomes bigger from the bottom to the upper. The distribution of Fe, Al, Mn contents has distinct negative correlation with the grain-size of sediment, that is to say, the fine-grained sediments have higher contents of Fe, Al, Mn. Pb, Zn and Cd are the dominating contaminative elements in tidal sediments of Bohai Bay. Their contents are higher than the corresponding environmental background values, indicating of the anthropogenic enrichment.
2003年11月，从大沽河口至歧口河口采集了3个沉积物岩芯。对岩芯沉积物的粒度、总有机碳（TOC）和重金属含量进行了分析，以研究渤海湾潮间带的地球化学特征、污染特征以及重金属的空间和垂直分布特征。潮间带沉积物的粒度由北向南变细。大沽河口和独流减河口沉积物的主要成分是超细砂、细砂和粉砂。歧口河口沉积物主要由粉砂和超细砂组成。3个沉积物岩芯的垂直分布趋势表明，粒度从底部到上部逐渐变大。铁、铝、锰含量的分布与沉积物粒度呈明显负相关，即细粒沉积物中铁、铝、锰含量较高。铅、锌和镉是渤海湾潮间带沉积物中的主要污染元素。它们的含量高于相应的环境背景值，表明存在人为富集。
