Distribution of Heavy Metal Speciation in Surface Sediment of Weihe River at Xianyang Section

ZHAI Yu-xiang; LU Xin-wei; HUANG Jing; ZHAI Meng; KANG Dan

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Distribution of Heavy Metal Speciation in Surface Sediment of Weihe River at Xianyang Section

- Distribution of Heavy Metal Speciation in Surface Sediment of Weihe River at Xianyang Section
- Bulletin of Soiland Water Conservation Vol. 28, Issue 3, Pages: 145-148(2009)
- 作者机构：
  
  陕西师范大学旅游与环境学院,陕西,西安,710062
- 作者简介：
- 基金信息：
- DOI：
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- Published：2009
- 稿件说明：
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ZHAI Yu-xiang, LU Xin-wei, HUANG Jing, et al. Distribution of Heavy Metal Speciation in Surface Sediment of Weihe River at Xianyang Section[J]. Bulletin of Soiland Water Conservation, 2009, 28(3): 145-148.
DOI：

ZHAI Yu-xiang, LU Xin-wei, HUANG Jing, et al. Distribution of Heavy Metal Speciation in Surface Sediment of Weihe River at Xianyang Section[J]. Bulletin of Soiland Water Conservation, 2009, 28(3): 145-148. DOI：

摘要

采用欧共体修正BCR四步连续提取法对渭河(咸阳段)的表层沉积物的重金属(Pb，Cr，Cu，Ni，Mn和Zn)形态进行了研究。结果表明，Cr，Ni和Zn主要以残渣态的形式存在，分别为97.91%，66.36%和73.68%，表现出很高的稳定性。而Pb和Mn仅在乙酸提取态含量分别达27.66%和38.49%时表现出一定的生物有效性和潜在危害性。“非稳定态“重金属的空间分布特征是沣河渭河交汇处上游位含量最高，其次为渭河3号桥下，沣河渭河交汇处下游含量最低。

Abstract

Distributions of heavy metal(Pb

and Zn)speciation in surface sediment of the Wei he River(Xianyang Section)were studied by using the modified four step sequential extraction(BCR method).Results show that Cr

and Zn mainly occurred as residual fraction

which were 97.91%

66.36%

and 73.68%

respectively.Pb and Mn indicated some bioavailability and potential ecological risks because the extraction of acid was 27.66%and 38.49%for Pb and Mn.The total"labile"f ractio natio next racted for heavy metals was highest in the upper confluence of Fenghe River and Weihe River

then higher in the third bridge of Weihe River

and the lowest in the downstream confluence of Fenghe River and Weihe River.

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