| 天然沸石对氨氮的吸附特性研究 |
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| 引用本文： | 邹娟,郭雪松,李琳,刘俊新.天然沸石对氨氮的吸附特性研究[J].山西大学学报(自然科学版),2011,34(3):485-491. |
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| 作者姓名： | 邹娟 郭雪松 李琳 刘俊新 |
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| 作者单位： | 中国科学院生态环境研究中心,北京,100085 |
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| 基金项目： | 国家科技重大专项“水污染控制与治理”资助(编号2008ZX07101-006-03) |
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| 摘 要： | 从天然沸石对氨氮的吸附动力学、吸附平衡、pH对吸附的影响及其作为垂直流人工湿地(Vertical flowconstructed wetland,VFCW)的填料处理生活污水的效果进行了研究.结果表明,该沸石对氨氮的吸附行为符合Langmuir和Freundlich吸附等温式,最大吸附量为8.10 mg/g;与颗粒内扩散模型相比,假二级反应模型能更好地描述沸石对氨氮的吸附全过程;沸石吸附氨氮的最佳pH为4.0~8.0.VFCW对氮的去除率(R,%)前3个月在90%以上,随后的7个月逐渐降低;当进水氨氮累计量与VFCW内沸石可吸附的最大氨氮量的比例(r)≤150%时,R与r呈线性关系.
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| 关 键 词： | 污水处理 氨氮去除 沸石 吸附 垂直流人工湿地 |
Characteristics of Ammonium Adsorption on Natural Zeolite |
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| ZOU Juan,GUO Xue-song,LI Lin,LIU Jun-xin.Characteristics of Ammonium Adsorption on Natural Zeolite[J].Journal of Shanxi University (Natural Science Edition),2011,34(3):485-491. |
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| Authors: | ZOU Juan GUO Xue-song LI Lin LIU Jun-xin |
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| Institution: | ZOU Juan,GUO Xue-song,LI Lin,LIU Jun-xin(Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China) |
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| Abstract: | Adsorption kinetics,adsorption equilibrium isotherms and the effect of pH on the removal of ammonium using natural zeolite were investigated.The results showed that the adsorption plots fit to Langmuir and Freundlich models very well,with the maximum ammonium adsorption capacity of 8.10 mg/g.Compared with the intra-particle diffusion kinetic model,the pseudo-second-order model reflected more reasonable for ammonium ion uptake on zeolite.The optimum adsorption capacity of ammonium was obtained at pH in the r... |
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| Keywords: | wastewater treatment ammonium removal zeolite adsorption vertical flow constructed wetland |
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