浑河底泥重金属污染评价及植物筛选

布点测定了浑河抚顺市区段底泥及河岸8种植物重金属(Cu、Pb、Cd、Hg)的含量,筛选出具有修复底泥重金属污染的植物。结果表明:浑河底泥整体上污染程度较轻,潜在生态风险较小,对河流污染程度顺序为:Cd>Hg>Cu>Pb。植物吸收累积综合效果:香蒲>戟叶蓼>水腊蓼>蔍草,其他几种植物吸收较弱。8种植物对4种重金属吸收累积含量均较低,均未达到超富集植物水平,其转移系数均小于1,属根部囤积型植物。

ASSESSMENT OF HEAVY METALS IN SEDIMENTS AND PLANT SCREENING ALONG HUN RIVER

This paper determined the heavy metals contents ( Cu，Pb，Cd and Hg) of sediments and eight kinds of plants of Fushun City section along Hun River，and screened the phytoremediation of sediments of heavy metals pollution． The result showed that the whole pollution degree of sediments along Hun River was less，and the potential ecological risk was low． The pollution degree was Cd ＞ Hg ＞ Cu ＞ Pb． The plant accumulation effect was bulrush ＞ polygonum thunbergii ＞ water plant polygonum ＞ scirpus triqueter，and that of the other plants were low． The accumulation of four heavy metals in eight kinds of plants was all too low to get hyperaccumulator plant level． The transfer factors were all less than one，and the plants belong to root hoarding type plants．