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巯基化膨润土对As3+的吸附解吸性能研究

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李媛媛, 董泳秀, 刘文华, 赵秋香. 巯基化膨润土对As3+的吸附解吸性能研究[J]. 环境保护科学, 2015, (1): 104-108. doi: 10.16803/j.cnki.issn.1004-6216.2015.01.023
引用本文: 李媛媛, 董泳秀, 刘文华, 赵秋香. 巯基化膨润土对As3+的吸附解吸性能研究[J]. 环境保护科学, 2015, (1): 104-108. doi: 10.16803/j.cnki.issn.1004-6216.2015.01.023
shu
Li Yuanyuan, Dong Yongxiu, Liu Wenhua, Zhao Qiuxiang. Adsorption and Desorption Properties of Thiol-functionalized Bentonite towards As3+[J]. Environmental Protection Science, 2015, (1): 104-108. doi: 10.16803/j.cnki.issn.1004-6216.2015.01.023
Citation: Li Yuanyuan, Dong Yongxiu, Liu Wenhua, Zhao Qiuxiang. Adsorption and Desorption Properties of Thiol-functionalized Bentonite towards As3+[J]. Environmental Protection Science, 2015, (1): 104-108. doi: 10.16803/j.cnki.issn.1004-6216.2015.01.023
shu

巯基化膨润土对As3+的吸附解吸性能研究

  • 广东省地质实验测试中心, 广东广州 510080

    • 作者简介: 李媛媛(1984-),女,硕士。研究方向:环境修复治理。E-mail:liyy84@163.com。
  • 基金项目:

    国土资源部公益性行业科研专项(201111016)基金资助

  • 中图分类号: X705

Adsorption and Desorption Properties of Thiol-functionalized Bentonite towards As3+

  • Guangdong Province Research Center for Geoanalysis, Guangzhou 510080, China

  • Fund Project:

  • 摘要: 水体及土壤砷污染已引起社会的广泛关注。本研究从7种改性膨润土中筛选出1种对As3+吸附能力较强的材料,即巯基化膨润土。其对As3+的吸附解吸研究显示,吸附在120min后达到平衡;在材料投加量达到0.1g后,As3+的吸附率基本不变;巯基化膨润土对As3+的吸附受pH、温度及离子强度影响较小,其对As3+的解吸受pH及离子强度影响也较小,且解吸率均小于1%。巯基化材料对As3+的饱和吸附量达到了1.18mg/g,比钙基膨润土提高了12倍以上;其比表面积比钙基膨润土提高了6倍以上。因此,巯基化膨润土是一种较理想的As3+吸附材料。
    Abstract: Arsenic pollution is of increasing concern due to its widespread occurrence in water and soil. In this study, thiolfunctionalized bentonite was selected from seven kinds of modified bentonite for its better adsorption ability of trivalent arsenic. From the study of adsorption and desorption properties of thiol-functionalized bentonite for As3+, the results showed that the adsorption reached in equilibrium within 120 minutes. After material dosage reached to 0.1g, the adsorption rate of As3+ kept almost unchanged. The influence of solution pH, temperature and ionic strength on As3+ adsorption was not much and the influence of solution pH and ionic strength on As3+ desorption was little, with the desorption rate below 1%. The maximum capacity of thiolfunctionalized bentonite for As3+ adsorption was 1.18 mg/g, which was more than 12 times as much as that of calcbentonite. The specific surface area of thiol-functionalized bentonite was more than 6 times as much as that of calcbentonite. Therefore, thiolfunctionalized bentonite could be taken as one ideal adsorbent for trivalent arsenic.
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  • 收稿日期:  2014-07-04
李媛媛, 董泳秀, 刘文华, 赵秋香. 巯基化膨润土对As3+的吸附解吸性能研究[J]. 环境保护科学, 2015, (1): 104-108. doi: 10.16803/j.cnki.issn.1004-6216.2015.01.023
引用本文: 李媛媛, 董泳秀, 刘文华, 赵秋香. 巯基化膨润土对As3+的吸附解吸性能研究[J]. 环境保护科学, 2015, (1): 104-108. doi: 10.16803/j.cnki.issn.1004-6216.2015.01.023
shu
Li Yuanyuan, Dong Yongxiu, Liu Wenhua, Zhao Qiuxiang. Adsorption and Desorption Properties of Thiol-functionalized Bentonite towards As3+[J]. Environmental Protection Science, 2015, (1): 104-108. doi: 10.16803/j.cnki.issn.1004-6216.2015.01.023
Citation: Li Yuanyuan, Dong Yongxiu, Liu Wenhua, Zhao Qiuxiang. Adsorption and Desorption Properties of Thiol-functionalized Bentonite towards As3+[J]. Environmental Protection Science, 2015, (1): 104-108. doi: 10.16803/j.cnki.issn.1004-6216.2015.01.023
shu

巯基化膨润土对As3+的吸附解吸性能研究

    作者简介: 李媛媛(1984-),女,硕士。研究方向:环境修复治理。E-mail:liyy84@163.com。
  • 广东省地质实验测试中心, 广东广州 510080
  • 收稿日期:  2014-07-04
基金项目:

国土资源部公益性行业科研专项(201111016)基金资助

摘要: 水体及土壤砷污染已引起社会的广泛关注。本研究从7种改性膨润土中筛选出1种对As3+吸附能力较强的材料,即巯基化膨润土。其对As3+的吸附解吸研究显示,吸附在120min后达到平衡;在材料投加量达到0.1g后,As3+的吸附率基本不变;巯基化膨润土对As3+的吸附受pH、温度及离子强度影响较小,其对As3+的解吸受pH及离子强度影响也较小,且解吸率均小于1%。巯基化材料对As3+的饱和吸附量达到了1.18mg/g,比钙基膨润土提高了12倍以上;其比表面积比钙基膨润土提高了6倍以上。因此,巯基化膨润土是一种较理想的As3+吸附材料。

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