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2003年10月～2005年8月期间,对太湖梅梁湾及其南部湖心区水域水体的重金属浓度进行了监测;探讨了重金属元素(Al、Ba、Ca、Co、Cu、Fe、K、Mg、Mn、Na、Ni、Pb、Si、Sr、Zn)的时空变化特征;研究了不同重金属元素在不同季节和区域的浓度变化趋势。结果表明,在整个监测时段,全湖区Al、Fe、Ba、Sr、K、Na浓度有所增加,增幅分别为193.55%、241.15%、1.91%、0.48%、21.35%、20.88%;而Zn、Co、Cu、Mn、Ni、Ca、Mg、Si浓度则有一定的降低,降幅分别为8.28%、54.55%、43.82%、47.75%、32.34%、5.51%、9.35%、70.41%;Pb的浓度基本保持恒定。除Ni、Pb外,水体中各个重金属元素的平均浓度均达到了生活饮用水标准。参照有关标准进行了水体重金属污染评价,结果表明,太湖水质较好,水体中基本上不存在有毒重金属生态污染风险。
The concentrations of heavy metals (Al, Ba, Ca, Co, Cu, Fe, K, Fe and K) in the waters of Meiliang Bay in Taihu Lake and the lake area in the south were monitored during the period from October 2003 to August 2005. Mg, Mn, Na, Ni, Pb, Si, Sr and Zn). The concentration trends of different heavy metals in different seasons and regions were studied. The results showed that the concentrations of Al, Fe, Ba, Sr, K and Na in the whole lake increased by 193.55%, 241.15%, 1.91%, 0.48%, 21.35% and 20.88% The concentrations of Co, Cu, Mn, Ni, Ca, Mg and Si decreased to 8.28%, 54.55%, 43.82%, 47.75%, 32.34%, 5.51%, 9.35% and 70.41% Maintain constant. In addition to Ni, Pb, the average concentrations of various heavy metals in the water reached the drinking water standard. The evaluation of heavy metal pollution of water bodies was carried out with reference to the relevant standards. The results showed that the water quality of Taihu Lake is good and there is basically no risk of toxic heavy metal pollution in water.