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金属矿山 ›› 2009, Vol. 39 ›› Issue (08): 149-152+178.

• 安全与环保 • 上一篇    下一篇

膨润土吸附水中Zn2+的影响因素研究

孟庆梅1,孙晨光2,刘晓东3,丁述理4   

  1. 1.山东理工大学;2.淄博永辰环境影响评价有限公司;3.淄博市环境监测站;4.河北工程学院
  • 出版日期:2009-08-17 发布日期:2011-04-26
  • 基金资助:

    河北省自然科学基金项目(编号:D2007000695),河北省科技厅博士基金项目(编号:05547009D-2)。

Factors for Removal of Zinc Cation from Aqueous solution by Bentonite

Meng Qingmei1,Sun Chenguang2,Liu Xiaodong3,Ding Shuli4   

  1. 1.Shandong University of Technology;2.Zibo Yongchen Environmental Impact Assessment Co., Ltd.;3.Zibo Environmental Monitoring Center;4.Hebei University of Engineering
  • Online:2009-08-17 Published:2011-04-26

摘要: 研究了邯郸钙基膨润土及其钠化土对Zn2+的吸附行为,考察了溶液中Zn2+的初始浓度、液固比、pH值、吸附时间、搅拌速度、温度、膨润土粒度等因素对膨润土吸附的影响。结果表明:钙基膨润土及其钠化土对Zn2+的吸附在2 h时都基本达到平衡;提高溶液的pH值、吸附温度和搅拌速度,延长吸附时间,降低膨润土的粒度、Zn2+的初始浓度和液固比,都能不同程度地提高膨润土对Zn2+的吸附率;在混合体系中,共存离子Pb2+对两种膨润土吸附Zn2+的效果都几乎没有影响,而Cr6+却会降低?街峙蛉笸炼訸n2+的吸附率。

关键词: 膨润土, Zn2+, 吸附

Abstract: The removal of zinc cations from aqueous solution by Ca-bentonite and Na-exchanged bentonite was studied.Such factors of affecting the adsorption of bentonite as the initial concentration of Zn2+, the liquid-to-solid ratio, pH value, adsorption time, stirring speed, temperature, and bentonite particle are investigated.The results showed that the removal of Zn2+ by Ca-bentonite and Na-exchanged bentonite can be equal at 2 h.The removal rate of Zn2+ by bentonite can be improved in various degree by increasing pH value, adsorption temperature, stirring speed, time extension, and decreasing bentonite particle, the initial concentration of Zn2+, and the liquid-to-solid ratio.In a complex system, Pb2+ has not influenced the removal of Zn2+ by both of bentonites, while Cr6+ can decease it.

Key words: Bentonite, Zn2+, Adsorption