不同硅铝比的ZSM-5型沸石分子筛吸附水中Cu2+离子的研究

万东锦; 袁海静; 曲丹; 王洪杰; 陈静; 刘永德

环境工程学报

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万东锦, 袁海静, 曲丹, 王洪杰, 陈静, 刘永德. 不同硅铝比的ZSM-5型沸石分子筛吸附水中Cu2+离子的研究[J]. 环境工程学报, 2011, 5(12): 2681-2686.

引用本文:

万东锦, 袁海静, 曲丹, 王洪杰, 陈静, 刘永德. 不同硅铝比的ZSM-5型沸石分子筛吸附水中Cu2+离子的研究[J]. 环境工程学报, 2011, 5(12): 2681-2686.

Wan Dongjin, Yuan Haijing, Qu Dan, Wang Hongjie, Chen Jing, Liu Yongde. Study on adsorption of Cu2+ from aqueous solution by ZSM-5 molecular sieve of different SiO2/Al2O3 ratios[J]. Chinese Journal of Environmental Engineering, 2011, 5(12): 2681-2686.

Citation:

Wan Dongjin, Yuan Haijing, Qu Dan, Wang Hongjie, Chen Jing, Liu Yongde. Study on adsorption of Cu2+ from aqueous solution by ZSM-5 molecular sieve of different SiO2/Al2O3 ratios[J]. Chinese Journal of Environmental Engineering, 2011, 5(12): 2681-2686.

不同硅铝比的ZSM-5型沸石分子筛吸附水中Cu2+离子的研究

1.
河南工业大学化学化工学院，郑州 450001
2.
北京林业大学环境科学与工程学院，北京 100085
基金项目:
国家高技术研究发展计划(863)项目(2009AA062905)

北京林业大学青年科技启动基金(BLX2009018，BLX2009019)

河南工业大学博士基金(2009BS057)

高等学校博士学科点专项科研基金(20100014120004)
中图分类号: X703

Study on adsorption of Cu2+ from aqueous solution by ZSM-5 molecular sieve of different SiO2/Al2O3 ratios

1.
School of Chemistry and Chemical Engineering， Henan University of Technology， Zhengzhou 450001，China
2.
College of Environmental Science and Engineering， Beijing Forestry University， Beijing 100085， China
Fund Project:

摘要: 考察了3种不同硅铝比的ZSM-5沸石分子筛（25H、38H和50H，25、38和50为硅铝比）对水中Cu2+的吸附过程及其影响因素。结果表明，3种材料均能有效吸附去除水中Cu2+离子，动力学符合假二阶动力学模型，吸附等温线符合Langmuir吸附等温式。3种材料吸附速率及吸附容量顺序为：25H＞50H＞38H，其中，25H最大吸附容量达到12.83 mg/g。投加量由0.8 g/L增加至2.0 g/L，材料对Cu2+吸附去除率由87.0%增加至97.5%。考察水中常见阳离子对吸附的干扰作用，结果表明，干扰离子的影响顺序为：Pb2+> K+> Na+ > Mg2+；随着干扰离子浓度的增大，材料对Cu2+的去除率显著下降。硅铝比及晶粒形貌均对沸石分子筛吸附Cu2+有较大影响，小的孔径不利于Cu2+的吸附，低硅铝比有利于Cu2+在分子筛上的吸附。
- 沸石分子筛 /
- 硅铝比 /
- 吸附 /
- 铜离子
Abstract: Adsorption of Cu2+ from aqueous solution by three kinds of ZSM-5 molecular sieve (25H， 38H， 50H， 25， 38 and 50 were SiO2/Al2O3 ratio) was investigated. The results showed that the ZSM-5 molecular sieves could adsorb Cu2+ from aqueous solution effectively. The adsorption process attributes to pseudo second-order kinetics model and the equilibrium isotherm for Cu2+ uptake corresponds closely to the Langmuir model. The corresponding sequence of adsorption rate and capacity was: 25H＞50H＞38H. The maximum adsorption capacity of 25H was up to 12.83 mg/g. As the adsorbent dosage increased from 0.8 g/L to 2.0 g/L， the removal rate increased from 87.0% to 97.5% correspondingly. The common cations could affect the adsorption process， the corresponding sequence was Pb2+> K+> Na+ > Mg2+. And higher concentration of co-existing cation had greater influence on adsorption removal efficiency. The SiO2/Al2O3 ratio and morphology features both have influence on Cu2+ adsorption， small pore size disbennifits adsorption， and low SiO2/Al2O3 ratio facilitates adsorption.
- ZSM-5 molecular sieve /
- SiO2/Al2O3 ratio /
- adsorption /
- Cu2+

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万东锦, 袁海静, 曲丹, 王洪杰, 陈静, 刘永德. 不同硅铝比的ZSM-5型沸石分子筛吸附水中Cu2+离子的研究[J]. 环境工程学报, 2011, 5(12): 2681-2686.

引用本文:

万东锦, 袁海静, 曲丹, 王洪杰, 陈静, 刘永德. 不同硅铝比的ZSM-5型沸石分子筛吸附水中Cu2+离子的研究[J]. 环境工程学报, 2011, 5(12): 2681-2686.

Citation:

Wan Dongjin, Yuan Haijing, Qu Dan, Wang Hongjie, Chen Jing, Liu Yongde. Study on adsorption of Cu2+ from aqueous solution by ZSM-5 molecular sieve of different SiO2/Al2O3 ratios[J]. Chinese Journal of Environmental Engineering, 2011, 5(12): 2681-2686.

不同硅铝比的ZSM-5型沸石分子筛吸附水中Cu2+离子的研究

1. 河南工业大学化学化工学院，郑州 450001
2. 北京林业大学环境科学与工程学院，北京 100085

收稿日期: 2011-01-10

基金项目:

国家高技术研究发展计划(863)项目(2009AA062905)

北京林业大学青年科技启动基金(BLX2009018，BLX2009019)

河南工业大学博士基金(2009BS057)

高等学校博士学科点专项科研基金(20100014120004)

关键词:

沸石分子筛 /
硅铝比 /
吸附 /
铜离子

摘要: 考察了3种不同硅铝比的ZSM-5沸石分子筛（25H、38H和50H，25、38和50为硅铝比）对水中Cu2+的吸附过程及其影响因素。结果表明，3种材料均能有效吸附去除水中Cu2+离子，动力学符合假二阶动力学模型，吸附等温线符合Langmuir吸附等温式。3种材料吸附速率及吸附容量顺序为：25H＞50H＞38H，其中，25H最大吸附容量达到12.83 mg/g。投加量由0.8 g/L增加至2.0 g/L，材料对Cu2+吸附去除率由87.0%增加至97.5%。考察水中常见阳离子对吸附的干扰作用，结果表明，干扰离子的影响顺序为：Pb2+> K+> Na+ > Mg2+；随着干扰离子浓度的增大，材料对Cu2+的去除率显著下降。硅铝比及晶粒形貌均对沸石分子筛吸附Cu2+有较大影响，小的孔径不利于Cu2+的吸附，低硅铝比有利于Cu2+在分子筛上的吸附。

English Abstract

Study on adsorption of Cu2+ from aqueous solution by ZSM-5 molecular sieve of different SiO2/Al2O3 ratios

1. School of Chemistry and Chemical Engineering， Henan University of Technology， Zhengzhou 450001，China
2. College of Environmental Science and Engineering， Beijing Forestry University， Beijing 100085， China

Received Date: 2011-01-10

Fund Project:

Keywords:

Abstract: Adsorption of Cu2+ from aqueous solution by three kinds of ZSM-5 molecular sieve (25H， 38H， 50H， 25， 38 and 50 were SiO2/Al2O3 ratio) was investigated. The results showed that the ZSM-5 molecular sieves could adsorb Cu2+ from aqueous solution effectively. The adsorption process attributes to pseudo second-order kinetics model and the equilibrium isotherm for Cu2+ uptake corresponds closely to the Langmuir model. The corresponding sequence of adsorption rate and capacity was: 25H＞50H＞38H. The maximum adsorption capacity of 25H was up to 12.83 mg/g. As the adsorbent dosage increased from 0.8 g/L to 2.0 g/L， the removal rate increased from 87.0% to 97.5% correspondingly. The common cations could affect the adsorption process， the corresponding sequence was Pb2+> K+> Na+ > Mg2+. And higher concentration of co-existing cation had greater influence on adsorption removal efficiency. The SiO2/Al2O3 ratio and morphology features both have influence on Cu2+ adsorption， small pore size disbennifits adsorption， and low SiO2/Al2O3 ratio facilitates adsorption.

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不同硅铝比的ZSM-5型沸石分子筛吸附水中Cu2+离子的研究

Study on adsorption of Cu2+ from aqueous solution by ZSM-5 molecular sieve of different SiO2/Al2O3 ratios

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不同硅铝比的ZSM-5型沸石分子筛吸附水中Cu2+离子的研究

English Abstract

Study on adsorption of Cu2+ from aqueous solution by ZSM-5 molecular sieve of different SiO2/Al2O3 ratios

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