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湖泊科学  2014 

磷在"沉积物-自然生物膜-上覆水"三相体系中的迁移转化

DOI: 10.18307/2014.0402

Keywords: 自然生物膜,,曝气,沉积物,上覆水

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Abstract:

地表水体中沉积物表面通常会附着一层自然生物膜,对上覆水-沉积物界面化学物质的迁移转化有着重要的影响.以往研究往往会忽略这一生物层面,因而,开展磷在"沉积物-自然生物膜-上覆水"三相界面之间的迁移转化研究具有重要的实际意义.以软性填料表面形成的自然生物膜模拟沉积物表层以及悬浮颗粒物表层的自然生物膜,开展磷在沉积物-自然生物膜-上覆水之间的迁移转化过程研究.结果表明:有无曝气情况下,自然生物膜界面的存在均能够显著降低上覆水中总磷、溶解态总磷、溶解态无机磷的含量,明显抑制沉积物中可交换态磷向上覆水释放.研究证明自然生物膜在水体磷的迁移转化中起着不可忽视的作用,在研究沉积物-上覆水界面之间磷的迁移转化行为时,要充分考虑自然生物膜界面的存在.

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