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不同粒径泥沙理化特性对磷吸附过程的影响

Keywords: 泥沙粒径,,吸附,理化特性

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Abstract:

以北京大兴南海子湖表层沉积物为研究对象,测试分析了0.147~0.246mm(细砂)、0.074~0.147mm(极细砂)、0.0385~0.0740mm(粉粒)和0.90)。粒径对单位质量泥沙吸附磷量具有明显影响,粉粒粘粒混合物>粉粒>细砂>极细砂。总体上,泥沙有机质(OM)、TP、Fe、Al、Ca和Mn含量随粒径的减小而增大,且粘粒对其影响较大。不同粒径泥沙(OM)、Fe、Al、Ca和Mn含量之间存在极显著正相关关系(P<0.01),且均对单位质量泥沙最大吸附量(Xm)和饱和吸附量(Cse)具有正效应,其中Al含量对该参数的影响更为显著。这说明泥沙对磷的吸附行为可能受到粒径和化学成分的共同影响。

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