干旱区生态环境知识资源中心(Arid): 干旱区绿洲土壤中重金属的形态分布及生物有效性研究

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	干旱区绿洲土壤中重金属的形态分布及生物有效性研究
其他题名	Experiments on speciation and bioavailability of selected heavy metals in arid oasis soil, northwest China
	汪霞; 南忠仁; 武文飞; 王胜利; 杨一鸣
来源期刊	生态环境学报
ISSN	1674-5906
出版年	2010
卷号	19 期号:7 页码:1663-1667
中文摘要	测定了Cd,Pb,Zn和Ni等重金属在不同处理土壤中的全量和各赋存形态,以及它们在盆栽试验油菜(Brassica cole)中的质量分数,并利用Pearson相关系数分析了该区土壤-油菜体系的生物有效性.结果表明,供试绿洲土壤原状土中, Cd,Pb,Zn和Ni均以稳定的残渣态形式存在;而在处理土壤中,重金属被钝化的量有限, Cd的存在形式主要以碳酸盐态为主, Pb,Zn和Ni则主要以铁锰氧化态为主.根据相关性分析,油菜根部和叶部的Ni质量分数均与土壤中Ni的各非残渣态分布系数有相关性,表明当土壤中Ni以非残渣态存在时,活动性Ni的质量分数较高,其被生物吸收利用的可能性也较大;油菜根部的Zn质量分数与土壤中Zn的碳酸盐结合态分布系数显著的正相关性;油菜各部位Cd和Pb的质量分数与土壤中Cd和Pb的各形态分布系数之间无显著相关关系
英文摘要	Pot experiments were conducted on cole(Brassica cole)grown in amended soils treated with the four heavy metals:cad-mium, lead, zinc, and nickel. The metal contents and speciation distribution coefficients of the four heavy metals were investigated in amended soils. Accumulation of the selected heavy metals in the tissues of cole were also measured, and the bioavailability of the selected metals in soil to cole was analyzed by employing Pearson coefficients. The results showed that the metal content of the amended soils was higher than that of the unamended soil for all the selected heavy metals. The findings suggested that cadmium, lead, zinc, and nickel were not uniformly absorbed by cole in arid oasis soils. According to the results of the Pearson coefficients,by comparing accumulations of heavy metals in the tissues of cole and the speciation distribution coefficients of the heavy metals in soil, the exchangeable fractions of cadmium, lead, zinc and nickel and the carbonate bound fractions of zinc and nickel were the most bioavailability to cole
中文关键词	干旱区绿洲土壤 ; 重金属 ; 镉 ; 铅 ; 锌 ; 镍 ; 形态分布 ; 生物有效性
英文关键词	arid oasis soil heavy metals Cd Pb Zn Ni speciation bioavailability
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:4041783
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/225476
作者单位	兰州大学资源环境学院, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	汪霞,南忠仁,武文飞,等. 干旱区绿洲土壤中重金属的形态分布及生物有效性研究[J]. 兰州大学,2010,19(7):1663-1667.
APA	汪霞,南忠仁,武文飞,王胜利,&杨一鸣.(2010).干旱区绿洲土壤中重金属的形态分布及生物有效性研究.生态环境学报,19(7),1663-1667.
MLA	汪霞,et al."干旱区绿洲土壤中重金属的形态分布及生物有效性研究".生态环境学报 19.7(2010):1663-1667.