无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ
研究与开发

氨基功能化铝麦羟硅钠石吸附Hg2+性能研究

  • 汤钦元 ,
  • 安燕 ,
  • 孙琦 ,
  • 郭兴强 ,
  • 黎青青 ,
  • 郭炳琛
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  • 1.贵州大学化学与化工学院,贵州贵阳 550003
    2.中国科学院地球化学研究所矿床地球化学国家重点实验室
    3.贵州大学资源与环境工程学院
汤钦元(1991— ),男,硕士生,主要从事环境功能材料的研究;E-mail: tqychem@126.com

收稿日期: 2020-03-09

  网络出版日期: 2020-08-12

基金资助

贵州省科技计划项目(黔科合LH字[2017]7255号);贵州省科技计划项目(黔科合平台人才[2017]5788);贵州大学科技合作项目(H160438号);贵州大学创新基金项目

Amino-functionalized Al-magadiite for Hg2+ adsorption

  • Qinyuan Tang ,
  • Yan An ,
  • Qi Sun ,
  • Xingqiang Guo ,
  • Qingqing Li ,
  • Bingchen Guo
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  • 1. School of Chemistry and Chemical Engineering,Guizhou University,Guiyang 550003,China
    2. State Key Laboratory of Ore Deposit Geochemistry,Institute of Geochemistry,Chinese Academy of Science
    3. School of Resources and Environmental Engineering,Guizhou University

Received date: 2020-03-09

  Online published: 2020-08-12

摘要

以水热合成的铝麦羟硅钠石(简称AlMag)为基体,以氨丙基三乙氧基硅烷为功能化试剂,制备氨基功能化的新型吸附剂材料AlMag-NH2,研究氨基改性过程对材料结构的影响及其对水溶液中Hg2+的吸附效果。表征结果显示,氨基官能团成功嫁接于AlMag基体上,功能化的AlMag-NH2由初始的玫瑰花苞形貌变为片层状形貌,层间距和平均孔径增大,比表面积略微减小,pHPZC升高。优化吸附实验条件,当溶液pH=5.0、吸附时间为360 min、Hg2+初始质量浓度为10 mg/L时,AlMag-NH2的去除率达到88.82%,是相同条件下AlMag去除率的2.4倍。AlMag-NH2的Hg2+饱和吸附量为20.62 mg/g,吸附过程符合准二级动力学和Langmuir模型,该过程主要为化学吸附。

本文引用格式

汤钦元 , 安燕 , 孙琦 , 郭兴强 , 黎青青 , 郭炳琛 . 氨基功能化铝麦羟硅钠石吸附Hg2+性能研究[J]. 无机盐工业, 2020 , 52(8) : 40 -45 . DOI: 10.11962/1006-4990.2020-0105

Abstract

A novel amino-functionalized adsorbent material Al-magadiite(abbreviated as AlMag-NH2) was prepared by hydrothermal synthesis with Al-magadiite(abbreviated as AlMag) as matrix and aminopropyltriethoxysilane as functional reagent.The effect of amino-modification process on the structure of the materials and the adsorption effect of Hg2+ in aqueous solution were studied.The characteristic results showed that the amino-functional groups were successfully grafted onto AlMag matrix.The functionalized AlMag-NH2 changed from the initial rosebud morphology to lamellar morphology.The interlayer spacing and average pore diameter increased,the specific surface area decreased slightly and the pHpzc increased.The experiment conditions were optimized and obtained as follows:the solution pH=5.0,the absorption time was 360 min and the initial mass concentration of Hg2+ was 10 mg/L. Under the same optimized conditions,the removal rate of AlMag-NH2 reached 88.82% and was 2.4 times than the removal rate of AlMag.The Hg2+ saturated adsorption capacity of AlMag-NH2was 20.62 mg/g.The adsorption process was in accordance with the pseudo second order kinetics and Langmuir model,which was mainly chemical adsorption.

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