| 改性斜发沸石吸附水中氨氮的研究 |
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| 引用本文： | 赵丹,王曙光,栾兆坤,苏永渤. 改性斜发沸石吸附水中氨氮的研究[J]. 环境化学, 2003, 22(1): 59-63 |
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| 作者姓名： | 赵丹 王曙光 栾兆坤 苏永渤 |
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| 作者单位： | 1. 中国科学院生态环境研究中心,环境水化学国家重点实验室,北京,100085
2. 东北大学理学院应用化学系,沈阳,110004 |
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| 基金项目： | 国家自然科学基金 (40 2 73 0 4 4)，环境水化学国家重点实验室资助项目 |
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| 摘 要： | 研究了改性斜发沸石对水中氨氮的吸附行为，考察了pH值，氨氮初始浓度以及竞争阳离子等对钠型沸石吸附氨氮的影响，同时进行了钠型沸石的吸附动力学研究。结果表明，采用饱和氯化钠改性制备得到的钠型沸石具有较大的饱和吸附容量，受氨氮初始浓度和溶液pH值的影响，钠型沸石吸附氨氮的行为在YNH4^ =0.5时发生偏离，竞争阳离子的存在在不同程度上抑制了钠型沸石对氨氮的吸附。钠型沸石吸附氨氮的行为在YNH4^ ＝0．5时发生偏离。竞争阳离子的存在在不同程度上抑制了钠型沸石对氨氮的吸附。钠型沸石吸附氨氮速度的控制步骤是内扩散步骤，可采用Vermeulen吸附模型加以描述。
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| 关 键 词： | 钠型沸石 改性处理 氨氮 吸附 水处理 |
STUDY ON THE AMMIONIA REMOVAL FROM WATER USING REMODELED CLINOPTILOLITE |
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| ZHAO Dan WANG Shu-guang LUAN Zhao-kun. STUDY ON THE AMMIONIA REMOVAL FROM WATER USING REMODELED CLINOPTILOLITE[J]. Environmental Chemistry, 2003, 22(1): 59-63 |
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| Authors: | ZHAO Dan WANG Shu-guang LUAN Zhao-kun |
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| Abstract: | The adsorption behavior of remodeled clinoptilolite to ammonium was studied in this paper.The effect of pH values,ammonium concentrations and competing cations were considered in the experiment.Furthermore,the kinetic characteristics of the zeolite was also investigated.The results indicated that the higher saturation adsorption capacity of clinoptilolite was achieved when the saturated sodium chloride was used to pretreat the zeolite.The adsorption behavior of the Na-pretreated zeolite deviated at Y NH 4=0.5 due to the effect of ammonium concentration and pH values.The existence of competing cations restrained the ammonium in Na-pretreated zeolite was diffusion in particle and could be described by Vermeulen model. |
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| Keywords: | Na-pretreated zeolite remodel ammonium adsorption behavior. |
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