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XU Duanping, CHE Yifu, WU Yao, WANG Yu. Sorption of mercury(Ⅱ) and arsenic(Ⅲ) on humic acid from peatsoil[J]. Chinese Journal of Environmental Engineering, 2017, 11(9): 5275-5282. doi: 10.12030/j.cjee.201609120
Citation: XU Duanping, CHE Yifu, WU Yao, WANG Yu. Sorption of mercury(Ⅱ) and arsenic(Ⅲ) on humic acid from peatsoil[J]. Chinese Journal of Environmental Engineering, 2017, 11(9): 5275-5282. doi: 10.12030/j.cjee.201609120
shu

Sorption of mercury(Ⅱ) and arsenic(Ⅲ) on humic acid from peatsoil

  • 1.

    College of Environmental Science and Engineering, Liaoning Engineering Technology University, Fuxin 123000, China

  • Received Date: 03/12/2016
    Accepted Date: 13/09/2016
    Available Online: 26/08/2017
    Fund Project:
  • Humic acid was extracted from peatsoil collected from Zhangwu county Liaoning province. Batch experiments were performed to investigate the sorption of Hg(Ⅱ) and As(Ⅲ) on the humic acid. Effect of temperature (15,25, 35, 45℃), pH (3, 5, 7, 9) and ionic strength (Ca2+, H2PO4-) on the sorption was also researched. Results indicated that sorption capacity of Hg(Ⅱ) and As(Ⅲ) on the humic acid was positively correlated with temperature, while temperature had little effect of As(Ⅲ) sorption on the humic acid.Sorption capacity of Hg(Ⅱ) on the humic acid was positively correlated with solution pH, while pH=7, sorption capacity of As(Ⅲ) on the humic acid reached the highest.Ca2+could reduce the sorption capacity of Hg(Ⅱ) on the humic acid while H2PO4- had few impact on the sorption of As(Ⅲ). Sorption isotherm of Hg(Ⅱ) and As(Ⅲ) on humic acid could be better discribed with Freundlich equation. Experimental data were better fitted with Lagrangian pseudo-second-order sorption kinetics equation. The sorption activation energy of Hg(Ⅱ) on the humic acid was 23.06 kJ·mol-1 and that of As(Ⅲ) was 2.65 kJ·mol-1. It indicated that sorption of Hg(Ⅱ) on the humic acid was controlled by chemical sorption while thjat of As(Ⅲ) on the humic acid was physical absorption mainly.
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Sorption of mercury(Ⅱ) and arsenic(Ⅲ) on humic acid from peatsoil

  • Received Date: 03/12/2016
  • Accepted Date: 13/09/2016
  • Available Online: 26/08/2017
Fund Project:

Abstract: Humic acid was extracted from peatsoil collected from Zhangwu county Liaoning province. Batch experiments were performed to investigate the sorption of Hg(Ⅱ) and As(Ⅲ) on the humic acid. Effect of temperature (15,25, 35, 45℃), pH (3, 5, 7, 9) and ionic strength (Ca2+, H2PO4-) on the sorption was also researched. Results indicated that sorption capacity of Hg(Ⅱ) and As(Ⅲ) on the humic acid was positively correlated with temperature, while temperature had little effect of As(Ⅲ) sorption on the humic acid.Sorption capacity of Hg(Ⅱ) on the humic acid was positively correlated with solution pH, while pH=7, sorption capacity of As(Ⅲ) on the humic acid reached the highest.Ca2+could reduce the sorption capacity of Hg(Ⅱ) on the humic acid while H2PO4- had few impact on the sorption of As(Ⅲ). Sorption isotherm of Hg(Ⅱ) and As(Ⅲ) on humic acid could be better discribed with Freundlich equation. Experimental data were better fitted with Lagrangian pseudo-second-order sorption kinetics equation. The sorption activation energy of Hg(Ⅱ) on the humic acid was 23.06 kJ·mol-1 and that of As(Ⅲ) was 2.65 kJ·mol-1. It indicated that sorption of Hg(Ⅱ) on the humic acid was controlled by chemical sorption while thjat of As(Ⅲ) on the humic acid was physical absorption mainly.

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