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Study on Absorption of Heavy Metals by Several Trees around the Gold Area
Author(s): 
Pages: 55-58
Year: Issue:  1
Journal: Journal of Northeast Forestry University

Keyword:  Heavy metals contaminationDendroremediationArtificial ecosystemGold area;
Abstract: 为了确定修复土壤重金属污染的植物种类,以潼关县黄金生产区及附近桑树(Morus albaL.)、杠柳(Periploca sepium Bunge)、洋槐(Robinia pseudoacacia L.)、酸枣(Ziziphus jujuba var,spinosa (Bunge) Hu)、毛白杨(Populus tomentosa Carr.)、枸树(Broussonetia papyrifera(L.)Vent.)为研究对象,用火焰原子吸收光谱法测定了其根、枝、叶及根际土壤中Cu、Cd和Zn质量分数.结果表明:6种树木根际区域3种重金属均处于污染状态;洋槐对Zn的转移系数为1.40,富集系数为10.61,是Zn的超富集植物;枸树对Cu的转移系数为0.87,富集系数为0.56,是6种植物中对Cu富集能力最强的树种;6种树木对Cd的富集系数均小于1,但桑树对Cd的转移系数高达8.90,洋槐的也达1.44,且Cd主要富集在叶片中,有利于回收,二者是吸收Cd的重要植物种类.
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