SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2013, Vol. 21 ›› Issue (11): 1260-1268.DOI: 10.1016/S1004-9541(13)60621-7

• 分离科学与工程 • 上一篇    下一篇

Characteristics of Amine Surfactant Modified Peanut Shell and Its Sorption Property for Cr(Ⅵ)

岳敏1,2, 张猛1, 刘斌3, 许醒1, 李小明1, 岳钦艳1, 马春元2   

  1. 1 School of Environmental Science and Engineering, Shandong University, Jinan 250100, China;
    2 Postdoctoral Research Station of Power Engineering and Engineering Thermophysics, Shandong University, Jinan 250063, China;
    3 Shandong Quality Inspection Center for Medical Devices, Jinan 250101, China
  • 收稿日期:2012-04-23 修回日期:2012-10-15 出版日期:2013-11-28 发布日期:2013-11-26
  • 通讯作者: YUE Min
  • 基金资助:

    Supported by the Independent Innovation Foundation of Shandong University (2012TS036).

Characteristics of Amine Surfactant Modified Peanut Shell and Its Sorption Property for Cr(Ⅵ)

YUE Min1,2, ZHANG Meng1, LIU Bin3, XU Xing1, LI Xiaoming1, YUE Qinyan1, MA Chunyuan2   

  1. 1 School of Environmental Science and Engineering, Shandong University, Jinan 250100, China;
    2 Postdoctoral Research Station of Power Engineering and Engineering Thermophysics, Shandong University, Jinan 250063, China;
    3 Shandong Quality Inspection Center for Medical Devices, Jinan 250101, China
  • Received:2012-04-23 Revised:2012-10-15 Online:2013-11-28 Published:2013-11-26
  • Contact: YUE Min
  • Supported by:

    Supported by the Independent Innovation Foundation of Shandong University (2012TS036).

摘要: Modified peanut shell (MPS) was prepared by amination reaction with peanut shell (PS) as the starting material. The sorption of Cr(Ⅵ) oxyanions on MPS in static and column tests were investigated. In addition, the sorption isotherm and kinetic models were applied to confirm the sorption capacity and the sorption mechanisms. BET surface area analysis showed the physicochemical characteristics of the samples. The results of zeta potential, Fourier transform infrared (FT-IR) and Raman spectra analysis illustrated that chemical adsorption and ion exchange are the potential sorption mechanism. The static sorption test showed that the maximum sorption capacity (qmax) of MPS for Cr(Ⅵ) increased with temperature, which indicated that the Cr(Ⅵ) sorption process was endothermic. The saturated sorption capacity of Cr(Ⅵ) in the column sorption test was 138.34 mg·g-1, which accounted for 93.9% of the qmax at 25 ℃. The regeneration capacity of MPS was evaluated using HCl solution as an eluent. The high regeneration efficiency (82.6%) validated the dominance of the ion exchange mechanism in the Cr(Ⅵ) sorption process with Cl- ions displacing Cr(Ⅵ) oxyanion on MPS. The Langmuir isotherm model showed a higher correlation coefficient than the other adsorption isotherm models. And in the kinetic study, a pseudo-second-order model fit the data best.

关键词: modified peanut shell, amination, Cr(Ⅵ), adsorption, mechanism

Abstract: Modified peanut shell (MPS) was prepared by amination reaction with peanut shell (PS) as the starting material. The sorption of Cr(Ⅵ) oxyanions on MPS in static and column tests were investigated. In addition, the sorption isotherm and kinetic models were applied to confirm the sorption capacity and the sorption mechanisms. BET surface area analysis showed the physicochemical characteristics of the samples. The results of zeta potential, Fourier transform infrared (FT-IR) and Raman spectra analysis illustrated that chemical adsorption and ion exchange are the potential sorption mechanism. The static sorption test showed that the maximum sorption capacity (qmax) of MPS for Cr(Ⅵ) increased with temperature, which indicated that the Cr(Ⅵ) sorption process was endothermic. The saturated sorption capacity of Cr(Ⅵ) in the column sorption test was 138.34 mg·g-1, which accounted for 93.9% of the qmax at 25 ℃. The regeneration capacity of MPS was evaluated using HCl solution as an eluent. The high regeneration efficiency (82.6%) validated the dominance of the ion exchange mechanism in the Cr(Ⅵ) sorption process with Cl- ions displacing Cr(Ⅵ) oxyanion on MPS. The Langmuir isotherm model showed a higher correlation coefficient than the other adsorption isotherm models. And in the kinetic study, a pseudo-second-order model fit the data best.

Key words: modified peanut shell, amination, Cr(Ⅵ), adsorption, mechanism