Qin Yan-Wen, Meng Wei, Zheng Bing-Hui, Su Yi-Bin
River and Coastal Environment Research Center, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
J Environ Sci (China). 2006;18(3):610-5.
Three sediment cores were collected in November 2003 from Dagu estuary to Qikou estuary. The main polluted heavy metals in the sediment of tidal zones for the Bohai Bay have been found by analyzing the relationship among the contents of heavy metals, the contents of geochemical elements (Fe, Al and Mn) and the size of grain. The dominating contaminative elements in tidal sediments of Bohai Bay are Pb, Zn and Cd. Their contents are higher than the corresponding upper limit of environmental background values and they have very faint correlation with the corresponding contents of geochemical elements and the size of grain, indicating the anthropogenic enrichment. Especially, the preliminary study on the pollution sources and the history of heavy metals in the Dagu estuary has been done using the dated results. The contamination by Zn and Cd also started in the middle 1950s, while the contamination by Pb appeared in the early 1940s. The pollution by Zn and Cd mainly originate from sewage discharge, while the pollution by Pb has many sources, like atmosphere deposition and industrial discharge.
2003年11月，从大沽河口至歧口河口采集了3个沉积物岩芯。通过分析重金属含量、地球化学元素（铁、铝和锰）含量与粒度之间的关系，找出了渤海湾潮间带沉积物中主要的污染重金属。渤海湾潮间带沉积物中的主要污染元素为铅、锌和镉。它们的含量高于相应环境背景值的上限，且与相应地球化学元素的含量和粒度的相关性很弱，表明存在人为富集。特别是，利用测年结果对大沽河口重金属的污染源和污染历史进行了初步研究。锌和镉的污染也始于20世纪50年代中期，而铅的污染出现在20世纪40年代初。锌和镉的污染主要源于污水排放，而铅的污染有多种来源，如大气沉降和工业排放。
