泉州湾重金属污染生态地球化学预警

水中的重金属元素易附着于表面积较大的悬浮颗粒物上而进入水底沉积物中，当外界条件改变时，又会重新释放到水体中而形成二次污染。因此，沉积物是水中重金属污染物的集蚋器，是研究湖泊、河口和港湾污染现状和污染历史的最可靠的采样介质。对接受了漂染、制革等工业废水污染源的福建省泉州湾沉积物和沉积柱进行生态地球化学调查取样，用原子荧光法（AFS）和质谱法（ICP—MS）测试了样品中的重金属元素As、Hg、Pb、Cd、Cr、Cu、Zn、Ni的含量。并进行了沉积柱^210Pb测年分析。通过数学法和增长趋势线法对海湾沉积物和沉积柱中重金属污染分别进行了生态地球化学预警，结果表明：八种重金属元素除Pb外，其它各重金属元素运用两种预警方法所得的顸警结果基本一致，As、Cr、Cu、Ni、Zn五种重金属含量有逐年增大的趋势，未采20～30年内将会对泉州湾生态环境产生巨大负面影响，在沉积过程中，Hg和Cd的含量基本上不变化或出现了负增长。但也对泉州湾生态环境造成一定的影响。

Early Warning on Eco- geochemistry of Heavy Metal Pollution in Quanzhou Bay, Fujian Province, Southeast China

Heavy metals dissolved in water were adsorbed by suspension thing and then deposited and enriched in sediment. When physical and chemical conditions changed, a part of heavy metals in sediment can release and enter into water pole. As a result, twice pollution produced. Samples of sediment and sediment core were collected from Quanzhou Bay, Fujian province, Southeast China. Concentrations of Cu, Pb, Zn, As, Cd, Cr, Ni and Hg in sediment and sediment core were determined utilizing a Atomic Fluorescence Speetrophotometer（AFS） and ICP - MS. And ^210Ph dating of sediment core was also determined. The mathematics and trendline method were using to early warning on Eco - geochemistry of heavy metals pollution in sediment and sediment core, respectively. The result shows that the two kinds of early warning time of eight kinds of heavy metals except for Pb are identical. With the time past, the concentrations of As, Cr, Cu, Ni and Zn all increase. Two or three decade years later, heavy metals pollution of As, Cr, Cu, Ni and Zn will bring large negative affect for ecology and environment of Quanzhou Bay. Though the concentrations of Hg and Cd are not changed or negative increased, they will will bring large negative affect for ecology and environment of Quanzhou Bay in two or three decade years later, too.