| 渭河(咸阳段)表层沉积物中重金属形态分布特征 |
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| 引用本文： | 翟雨翔,卢新卫,黄静,翟萌,康丹. 渭河(咸阳段)表层沉积物中重金属形态分布特征[J]. 水土保持通报, 2009, 23(3): 145-148 |
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| 作者姓名： | 翟雨翔 卢新卫 黄静 翟萌 康丹 |
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| 作者单位： | 陕西师范大学旅游与环境学院,陕西,西安,710062 |
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| 基金项目： | 教育部新世纪优秀人才支持计划项目 |
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| 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.
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| 关 键 词： | 渭河 沉积物 重金属 形态 咸阳段 |
| 收稿时间： | 2008-12-06 |
| 修稿时间： | 2008-02-06 |
Distribution of Heavy Metal Speciation in Surface Sediment of Weihe River at Xianyang Section |
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| ZHAI Yu-xiang,LU Xin-wei,HUANG Jing,ZHAI Meng and KANG Dan. Distribution of Heavy Metal Speciation in Surface Sediment of Weihe River at Xianyang Section[J]. Bulletin of Soil and Water Conservation, 2009, 23(3): 145-148 |
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| Authors: | ZHAI Yu-xiang LU Xin-wei HUANG Jing ZHAI Meng KANG Dan |
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| Affiliation: | School of Tourism and Environment Science, Shaanxi Normal University, Xi'an, Shaanxi 710062, China;School of Tourism and Environment Science, Shaanxi Normal University, Xi'an, Shaanxi 710062, China;School of Tourism and Environment Science, Shaanxi Normal University, Xi'an, Shaanxi 710062, China;School of Tourism and Environment Science, Shaanxi Normal University, Xi'an, Shaanxi 710062, China;School of Tourism and Environment Science, Shaanxi Normal University, Xi'an, Shaanxi 710062, China |
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| Abstract: | Distributions of heavy metal(Pb,Cr,Cu,Ni,Mn,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,Ni,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 risksbecause 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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| Keywords: | BCR |
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