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湖泊科学  2008 

4种填料对氨氮的吸附效果

DOI: 10.18307/2008.0613

Keywords: 填料,氨氮,吸附,解吸,影响因素

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Abstract:

氮是引发湖泊富营养化的重要元素之一,湖泊外源和内源氮的去除对湖泊富营养化的控制非常关键,其中填料对氨氮的去除是湖泊外源控制的重要途径.研究了4种填料(天然沸石、陶粒、蛭石和土壤)对氨氮的吸附行为、填料去除氨氮的主要途径以及溶液中pH值和温度对氨氮去除率的影响.结果表明沸石对氨氮的吸附效果明显,蛭石次之,土壤与陶粒效果较差.沸石去除氨氮的途径以离子交换作用为主,物理吸附作用很小;陶粒、土壤和蛭石3种填料的离子交换作用和物理吸附作用的效果相当.4种填料的吸附量在温度为15-35℃内均随温度的升高而减小,在pH值为3-9范围内随pH值升高而增大,振荡6h均达到吸附平衡.

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