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地理科学  2015 

长江北支口门圆陀角附近潮滩沉积物重金属来源及污染评价

, PP. 380-386

Keywords: 潮滩,重金属来源,地累积指数,潜在生态风险系数,圆陀角

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Abstract:

基于圆陀角附近潮滩YY孔岩芯重金属(Co、Cr、Cu、Mn、Ni、V、Zn)富集系数和人为贡献率、地累积指数和潜在生态风险系数,讨论了圆陀角附近潮滩重金属来源及污染。结果表明,重金属Co、V平均含量显著高于背景值。除Cr是自然来源外,其它6种重金属受自然和人为来源的影响,且以自然来源为主。7种重金属总体无污染,仅Co、Cu、V和Zn在岩芯132cm处出现无污染至中度污染。7种重金属潜在生态危害属轻微水平。值得关注的是,1997年之后,重金属Co、Cr、Mn、V、Zn地累积指数和潜在生态风险系数均有增加的趋势。

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