巢湖沿岸沉积物几种重金属污染现状评价

Environment Quality Assessment of Heavy Metals in sediment along ChaoHu Lack

分析了巢湖沿岸九个地区的沉积物中Cu、Pb、Mn、Zn、Cr、Cd全量,并对沉积物中各重金属的存在形态包括水可溶态、可交换态及弱酸有效态进行分析。结果表明:巢湖及其支流沿岸沉积物Zn、Mn、Cr三元素含量较高,达轻度及以上污染Cd、Pb、Cu大部分样点显示清洁,仅个别样点评价为轻度污染。几种重金属元素,含量为弱酸有效态>可交换态>水可溶态。特别是重金属Pb较高的生物有效性应引起重视,且其可交换态含量较低,Mn、Cu的弱酸有效态的含量也较高。水溶态各重金属元素含量不高,未超过环境标准。

This paper through the research of sediment from nine places along the lake of ehaohu, which study the quantity of Cu, Pb, Mn, Zn, Cr, Cd in sediment and analyze the phase of clissolvent by water , exchangeable and weak oxide effective distribute situation in it . The results show that： Zn, Mn, Cr in sediment along the chaohu lake is high, It＇ s pollution to lower and middle grade. But Cd ,Pb,Cu is clean in most area . From the analyze of phase of heavy metals can get ： weak acid effective 〉 exchangeable 〉 dissolvent by water. Particularly the phase is weak oxide effective heavy metal of Pb is higher , and the phase of exchangeable is lower. The weak acid effective of Mn,Cu is also higher. The phase of dissolvent by water of the six heavy metal element is small.