珠江上游南盘江Pb、Zn多介质行为研究

【目的】揭示珠江上游多介质典型重金属Pb、Zn的含量与分布特征,存在形态与环境风险之间的关系以及迁移规律。【方法】测定了珠江上游南盘江流域农田、非农田土壤及沉积物中Pb、Zn的含量,并采用BCR连续提取法分析了Pb、Zn的存在形态。【结果】研究区农田土壤部分样点存在Pb、Zn不同程度富集,但多数农田土壤Pb、Zn含量未超过中国土壤质量标准（GB15618-1995）的限值,沉积物中Pb、Zn含量也未超过欧盟淡水沉积物Pb、Zn标准（EC standard）限值。位于工业区（A8样点）农田和非农田土壤Pb、Zn含量显著高于其它样点。【结论】3种介质中的Pb、Zn形态分布模式是相似的,Zn的迁移性...

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Bibliographic Details
Published in西南农业学报 Vol. 30; no. 7; pp. 1619 - 1624
Main Author 杨思林 赵宁 王大伟 陆梅 杨斌
Format Journal Article
LanguageChinese
Published 西南林业大学环境科学与工程学院,云南昆明,650224%西南林业大学生命科学学院,云南昆明,650224%云南省森林灾害预警与控制重点实验室,云南昆明,650224 2017
Subjects
形态
珠江
迁移性
重金属
珠江
形态
迁移性
Mobility
Pearl River Delta
Speciation
重金属
Heavy metal
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Summary:【目的】揭示珠江上游多介质典型重金属Pb、Zn的含量与分布特征,存在形态与环境风险之间的关系以及迁移规律。【方法】测定了珠江上游南盘江流域农田、非农田土壤及沉积物中Pb、Zn的含量,并采用BCR连续提取法分析了Pb、Zn的存在形态。【结果】研究区农田土壤部分样点存在Pb、Zn不同程度富集,但多数农田土壤Pb、Zn含量未超过中国土壤质量标准（GB15618-1995）的限值,沉积物中Pb、Zn含量也未超过欧盟淡水沉积物Pb、Zn标准（EC standard）限值。位于工业区（A8样点）农田和非农田土壤Pb、Zn含量显著高于其它样点。【结论】3种介质中的Pb、Zn形态分布模式是相似的,Zn的迁移性高于Pb,沉积物Pb、Zn的迁移性高于土壤。
Bibliography:51-1213/S
Pearl River Delta; Heavy metal; Speciation ; Mobility
[ Objective ] The objective of this study is to reveal concentration and distribution of typical heavy metals （Pb and Zn）, and to un- derstand the relationship between its speciation and environmental risks as well as its transfer rules. [ Method] The concentration of Pb and Zn in agricultural, non-agricultural soils and sediment were investigated in upstream of the Pearl River, China. The sequential extraction procedure recommended by BCR method was applied to study the speeiation of Pb and Zn. [ Result] The results suggested that, Pb and Zn were accumulated somehow in several of the samples in agricultural soil, and their concentrations in all the sampling sites did not exceeded the maximum allowable concentrations of China agricultural soil standard （ GB15618-1995 ）. Total concentrations of Pb and Zn in all the sampling site for sediment also did not exceeded standard values of European commission for freshwater sediments （ EC standard）. Total P
ISSN:1001-4829
DOI:10.16213/j.cnki.scjas.2017.7.026