鄂东南铁山地区土壤—植物系统中重金属元素分布及富集特征

Distribution and Accumulation of Heavy Metal Elements from Soil-Plant System in Tieshan,Southeast Hubei Province

采用原子荧光光谱法和等离子体质谱法(ICP-MS)对鄂东南铁山地区主要河流流经区土壤、植物中重金属元素质量分数及其富集特征的研究表明,研究区西港河流域下游局部地段形成Cu、Zn、Ni、Cd、As重金属元素的土壤污染,东港河流域下游局部地段形成Cd、Cu、As、Pb、Zn重金属元素的土壤污染,植物中已经形成Cd、Zn元素的超量富集。其中土壤中重金属元素的富集主要与冶炼厂废水和尾矿坝渗漏水有关,而植物中重金属元素的富集则受土壤中重金属元素质量分数和植物吸收性能的双重控制。

This paper studies the regularity of distribution and accumulation of heavy metal elements from soil-plant system in Tieshan, Southeast Hubei province. The result shows that soil in lower reaches of Donggang creek is seriously polluted by Cu, Zn, Ni, Cd, As, and that in lower reaches of Xigang creek is mainly polluted by Cd, Cu, As, Pb, Zn . The pollution matter mainly comes from the waster water of the smelting factory and the leakage of mine railings. While the excessive accumulation of Cd and Zn in plants is mainly controlled both by the content of heavy metal elements in soil and their own absorbency.