| 两种不同硅铝比的ZSM-5型分子筛去除水中Pb~(2+)的研究 |
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| 引用本文： | 万东锦,许元栋,许辉,刘永德,张迎明.两种不同硅铝比的ZSM-5型分子筛去除水中Pb~(2+)的研究[J].环境工程,2012(Z2):26-29. |
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| 作者姓名： | 万东锦 许元栋 许辉 刘永德 张迎明 |
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| 作者单位： | 河南工业大学化学化工学院 |
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| 基金项目： | 河南省重大公益性科研招标项目:污泥无害化处理及综合利用关键技术研究与示范;河南工业大学博士基金2009BS057 |
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| 摘 要： | 考察硅铝比不同的ZSM-5两种分子筛(25H和50H,25和50为硅铝比:SiO2/Al2O3)对水中Pb2+离子的吸附去除效能。两种材料均可有效吸附去除水中Pb2+离子,吸附等温线符合Langmuir吸附等温式,25H的最大吸附容量达22.22mg/g,吸附动力学符合假二阶动力学模型,吸附速率及吸附容量顺序为:25H>50H。随着投加量的增加,分子筛对Pb2+的去除率呈上升趋势。常见共存阳离子均对分子筛吸附去除Pb2+产生影响。
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| 关 键 词： | ZSM-5沸石分子筛 硅铝比 吸附 Pb2+ |
ADSORPTION OF PB2+ FROM AQUEOUS SOLUTION BY ZEOLITE MOLECULAR SIEVE OF TWO DIFFERENT SIO2/AL2O3 RATIO |
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| Wan Dongjin Xu Yuandong Xu Hui Liu Yongde Zhang Yingming.ADSORPTION OF PB2+ FROM AQUEOUS SOLUTION BY ZEOLITE MOLECULAR SIEVE OF TWO DIFFERENT SIO2/AL2O3 RATIO[J].Environmental Engineering,2012(Z2):26-29. |
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| Authors: | Wan Dongjin Xu Yuandong Xu Hui Liu Yongde Zhang Yingming |
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| Institution: | Wan Dongjin Xu Yuandong Xu Hui Liu Yongde Zhang Yingming (School of Chemistry and Chemical Engineering,Henan University of Technology,Zhengzhou 450001,China) |
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| Abstract: | Adsorption of Pb2+ from aqueous solution by ZSM-5 molecular sieve of two different SiO2/Al2O3 ratio(25H,50H,25 and 50 were SiO2/Al2O3 ratio) was investigated.The results showed that the ZSM-5 molecular sieves could adsorb Pb2+ from aqueous solution effectively.The adsorption kinetics and isotherm of Pb2+ uptake could be satisfactorily described with pseudo second-order kinetics model and the Langmuir model.The maximum adsorption capacity calculated by Langmuir model of 25H was 22.22 mg/g.The corresponding sequence of adsorption rate and capacity was: 25H>50H.With the increase of adsorbent dosage,the removal efficiency appeared ascendant trend.And common co-existing cation had influence on adsorption removal efficiency. |
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| Keywords: | ZSM-5 molecular sieve SiO2/Al2O3 ratio adsorption Pb2+ |
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