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氧化镁基固化剂对铅离子的吸附作用及其影响因素

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赖胜强, 林亲铁, 项江欣, 钟松雄, 姚晓声, 陈志良. 氧化镁基固化剂对铅离子的吸附作用及其影响因素[J]. 环境工程学报, 2016, 10(7): 3859-3865. doi: 10.12030/j.cjee.201502110
引用本文: 赖胜强, 林亲铁, 项江欣, 钟松雄, 姚晓声, 陈志良. 氧化镁基固化剂对铅离子的吸附作用及其影响因素[J]. 环境工程学报, 2016, 10(7): 3859-3865. doi: 10.12030/j.cjee.201502110
shu
LAI Shengqiang, LIN Qintie, XIANG Jiangxin, ZHONG Songxiong, YAO Xiaosheng, CHEN Zhiliang. Adsorption of Pb2+ on a magnesia-based curing agent and its influencing factors[J]. Chinese Journal of Environmental Engineering, 2016, 10(7): 3859-3865. doi: 10.12030/j.cjee.201502110
Citation: LAI Shengqiang, LIN Qintie, XIANG Jiangxin, ZHONG Songxiong, YAO Xiaosheng, CHEN Zhiliang. Adsorption of Pb2+ on a magnesia-based curing agent and its influencing factors[J]. Chinese Journal of Environmental Engineering, 2016, 10(7): 3859-3865. doi: 10.12030/j.cjee.201502110
shu

氧化镁基固化剂对铅离子的吸附作用及其影响因素

  • 1.

    广东工业大学环境科学与工程学院, 广州 510006

  • 2.

    环境保护部华南环境科学研究所, 广州 510655

  • 基金项目:

    国家自然科学基金资助项目(41371317)

    广东省普通高校特色创新项目(2014KTSCX056)

    广州市产学研协同创新重大专项(201604020077)

  • 中图分类号: X53

Adsorption of Pb2+ on a magnesia-based curing agent and its influencing factors

  • 1.

    Faculty of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China

  • 2.

    South China Institute of Environmental Science, Ministry of Environmental Protection, Guangzhou 510655, China

  • Fund Project:

  • 摘要: 应用批量平衡法,以膨润土、硅藻土和氧化镁为原料,探索了组配固化剂对Pb2+的吸附性能、作用机制及影响因素,为将天然材料固化剂应用于重金属污染土壤修复提供理论参考。结果表明,组配固化剂对Pb2+的吸附行为符合二级动力学模型,等温吸附曲线符合Langmuir方程,吸附过程是自发、吸热反应,以物理吸附为主,30、40和50 ℃的最大吸附量分别为96.2、114.9和151.5 mg·g-1。吸附过程受pH值和盐度的影响,膨润土、硅藻土与氧化镁混合,能有效提高对Pb2+的吸附固化效果。
    Abstract: A magnesia-based curing agent was prepared using bentonite,diatomite,and magnesia with the help of the batch equilibrium method.Pb2+ adsorption and its influential factors on securing a matching curing agent in aqueous solution were investigated.The sorption kinetic processes followed a pseudo-second-order kinetic model,as the isothermal data more closely followed a Langmuir model than a Freundlich or Tempkin model.The maximum Pb2+ adsorption capacity to matching curing agent of 96.2,114.9,and 151.5 mg·g-1 was observed at 30,40 and 50 ℃,respectively.The apparent thermodynamic parameters(ΔG0,ΔH0,and ΔS0) indicated that the adsorption process was spontaneous,endothermic,and entropically unfavorable toward physisorption.The pH and calcium ion strength affected the adsorption,indicating that bentonite and diatomite promoted the adsorption effect of magnesia.
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  • 收稿日期:  2015-03-22
  • 刊出日期:  2016-07-06
赖胜强, 林亲铁, 项江欣, 钟松雄, 姚晓声, 陈志良. 氧化镁基固化剂对铅离子的吸附作用及其影响因素[J]. 环境工程学报, 2016, 10(7): 3859-3865. doi: 10.12030/j.cjee.201502110
引用本文: 赖胜强, 林亲铁, 项江欣, 钟松雄, 姚晓声, 陈志良. 氧化镁基固化剂对铅离子的吸附作用及其影响因素[J]. 环境工程学报, 2016, 10(7): 3859-3865. doi: 10.12030/j.cjee.201502110
shu
LAI Shengqiang, LIN Qintie, XIANG Jiangxin, ZHONG Songxiong, YAO Xiaosheng, CHEN Zhiliang. Adsorption of Pb2+ on a magnesia-based curing agent and its influencing factors[J]. Chinese Journal of Environmental Engineering, 2016, 10(7): 3859-3865. doi: 10.12030/j.cjee.201502110
Citation: LAI Shengqiang, LIN Qintie, XIANG Jiangxin, ZHONG Songxiong, YAO Xiaosheng, CHEN Zhiliang. Adsorption of Pb2+ on a magnesia-based curing agent and its influencing factors[J]. Chinese Journal of Environmental Engineering, 2016, 10(7): 3859-3865. doi: 10.12030/j.cjee.201502110
shu

氧化镁基固化剂对铅离子的吸附作用及其影响因素

  • 1. 广东工业大学环境科学与工程学院, 广州 510006
  • 2. 环境保护部华南环境科学研究所, 广州 510655
  • 收稿日期:  2015-03-22
基金项目:

国家自然科学基金资助项目(41371317)

广东省普通高校特色创新项目(2014KTSCX056)

广州市产学研协同创新重大专项(201604020077)

摘要: 应用批量平衡法,以膨润土、硅藻土和氧化镁为原料,探索了组配固化剂对Pb2+的吸附性能、作用机制及影响因素,为将天然材料固化剂应用于重金属污染土壤修复提供理论参考。结果表明,组配固化剂对Pb2+的吸附行为符合二级动力学模型,等温吸附曲线符合Langmuir方程,吸附过程是自发、吸热反应,以物理吸附为主,30、40和50 ℃的最大吸附量分别为96.2、114.9和151.5 mg·g-1。吸附过程受pH值和盐度的影响,膨润土、硅藻土与氧化镁混合,能有效提高对Pb2+的吸附固化效果。

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