G 0, ?em class="a-plus-plus">H 0, and ?em class="a-plus-plus">S 0 were calculated to reveal the nature of sorption. Original calcite and the products of adsorption were characterized using SEM, TEM/EDAX, SAED, XRD, and BET. Dissolution of calcite followed by precipitation of lead carbonate was found to be the main operating mechanism for Pb2+ adsorption by calcite." />
The removal of lead ions of the aqueous solution by calcite with cotton morphology
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  • 作者:Zexiang Liu (1)
    Qiuying Shen (1) (2)
    Qiance Zhang (1)
    Longchun Bian (3)
    Yongjun Liu (3)
    Bo Yuan (3)
    Xuejun Pan (2)
    Fengzhi Jiang (1) (3)
  • 刊名:Journal of Materials Science
  • 出版年:2014
  • 出版时间:August 2014
  • 年:2014
  • 卷:49
  • 期:15
  • 页码:5334-5344
  • 全文大小:
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  • 作者单位:Zexiang Liu (1)
    Qiuying Shen (1) (2)
    Qiance Zhang (1)
    Longchun Bian (3)
    Yongjun Liu (3)
    Bo Yuan (3)
    Xuejun Pan (2)
    Fengzhi Jiang (1) (3)

    1. School of Chemical Science and Technology, Yunnan University, Kunming, 650091, People’s Republic of China
    2. Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, 650091, People’s Republic of China
    3. Advanced Analysis and Measurement Center, Yunnan University, Kunming, 650091, People’s Republic of China
  • ISSN:1573-4803
文摘
In this paper, calcite with cotton morphology was prepared by co-precipitation method using cotton as templates. The effect of contact time, initial concentration, and solution temperature on calcite adsorption of lead ions was studied using a batch technique. The maximal adsorption capacity of calcite for Pb2+ was 3347.02?mg/g with a minimum contact time of 60?min. The pseudo-second-order kinetic model and Langmuir/Freundlich isotherms were proposed for modeling kinetic and equilibrium data, respectively. Thermodynamic parameters such as ?em class="a-plus-plus">G 0, ?em class="a-plus-plus">H 0, and ?em class="a-plus-plus">S 0 were calculated to reveal the nature of sorption. Original calcite and the products of adsorption were characterized using SEM, TEM/EDAX, SAED, XRD, and BET. Dissolution of calcite followed by precipitation of lead carbonate was found to be the main operating mechanism for Pb2+ adsorption by calcite.

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