点源污染对胶州湾海水体系中不同形态重金属富集的影响

对胶州湾水体中悬浮颗粒物、柱状沉积物和底栖生物中重金属的污染与富集状况进行了分析与评价.结果表明:大量未处理的废水污水的排放入海与陆源物质向外海的有限扩散直接导致了点污染源对水体及生物体中重金属的富集.悬浮物中重金属的富集已明显受到人为因素的影响;柱状样的人为影响因子表明河口区沉积物的污染状况较其它海区重;胶州湾底栖生物体内重金属的含量与离污染源的远近有关系,底栖生物菲律宾蛤仔对重金属Cd的富集能力大于其它金属.

Influence of point sources on heavy metal accumulation in different apartments of Jiaozhou Bay

The pollution and enrichment states of heavy metals in suspended particulate matter (SPM), sediment core and benthic organisms were analyzed and evaluated in Jiaozhou Bay. Results showed that: (1) The discharge of a large amount of untreated effluents and the insufficient diffusion of the terrestrial contamination to outer bay directly led to point source contamination, which caused the heavy metal enrichment in water and in benthic organism; (2) Anthropogenic activities significantly affected the heavy metals enrichment in SPM. The anthropogenic factors (AF) of sediment cores showed that the pollution at the estuary was more serious than that of other investigated areas; (3) The concentration of heavy metals in benthic organism had close relationship with the distance from the sampling site to the pollution sources. Venerupis Philippinarum, a benthic organism, was estimated to have higher accumulating capacity to cadmium as compared to any other tested heavy metals.