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低浓度氨氮废水的离子交换法脱氮

Keywords: 氨氮废水,天然沸石,化学再生,化学沉淀法

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Abstract:

分别研究了沸石的等温吸附模型,改性沸石在交换柱中的穿透与再生,通过化学沉淀法对再生废液中氨氮的回收等。结果显示:60~80目单位重量天然斜发沸石对氨氮的饱和交换容量为4.15mg/g;30mg/L的氨氮废水经过交换柱后沸石的穿透吸附容量和平衡吸附容量分别为:4.50mg/g和4.757mg/g。化学再生后,用化学沉淀法使再生废液中氨氮由202mg/L降到16.3mg/L。

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