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湖泊科学  2003 

太湖北部沉积物金属和营养元素的垂向变化及其影响因素

DOI: 10.18307/2003.0304

Keywords: 金属,营养元素,210Pb,粒度,太湖

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Abstract:

通过对太湖北部2个柱状沉积物进行了210Pb、粒度、金属元素、有机碳、总氮、总磷及磷的形态分析,探讨了其垂向分布特征及其影响因素.粒度分析表明,沉积物呈现随深度变浅而变细的总体趋势.210Pb分析显示该区域表层沉积物扰动较为强烈,并存在侵蚀现象.Cu、Zn、Ni、Li、V、Fe、Al垂向上的变化主要与粘土含量呈正相关,其含量表明金属污染不显著.沉积物C/N比值显示有机质主要为陆源性质,磷以无机磷占绝对组分,有机磷含量向表层明显升高,反映了表层沉积物有机磷的输入较多或更好的保存条件.

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