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环境化学 2015

再悬浮条件下底泥对磷固定作用的研究

李大鹏,黄勇,李伟光

Keywords: 再悬浮,底泥,磷

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Abstract:

通过室内模拟试验,研究了底泥再悬浮对磷的强化固定作用.结果表明底泥再悬浮促进了磷由上覆水向底泥的迁移,并且强化了底泥对磷的固定作用.底泥曝气与机械搅拌使内源磷释放量从618.51mg·Kg-1分别降至424.99mg·Kg-1和581.55mg·Kg-1.底泥再悬浮对易释放态磷向难释放态磷转化具有显著的促进作用,铁结合态磷小幅度下降,而钙结合态磷显著增加,其余赋存形态磷变化不显著.说明底泥再悬浮对磷的固定机理可能是易释放态磷向难释放态磷的转化.

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