单宁酸铁吸附去除水中无机氮的性能与机制研究
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Abstract
通过批量吸附实验,研究了一种新型吸附材料——单宁酸铁吸附去除水中无机氮(NH+4-N、NO-2-N和NO-3-N)的效果及其吸附机制.结果表明,单宁酸铁对NH+4-N和NO-2-N具有优先选择性,当单宁酸铁与NH+4-N和NO-2-N的质量比为200时,NH+4-N和NO-2-N去除率均大于95%.运用吸附动力学模型、Weber-Morris方程、Langmuir和Freundlich方程进行实验数据拟合的结果表明,NH+4-N和NO-2-N在单宁酸铁表面分别进行单分子层和多分子层的吸附,其吸附过程符合二级动力学模型,并且颗粒外部扩散和表面吸附起主要的作用.NH+4-N与分布于单宁酸铁外表面的...
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- last seen: 2026-05-11T07:30:27.065691+00:00
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