화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.31, No.2, 253-261, February, 2014
DOI10.1007/s11814-013-0207-4  Export Citation
Effect of pH, ionic strength, foreign ions, humic acid and temperature on Zn(II) sorption onto γ-Al2O3
Jiang Xiao, Lanping Zhao1, Wei Zhang, Xia Liu, and Yuantao Chen†
  • Department of Chemistry, Qinghai Normal University, Xining, Qinghai 810008, P. R. China
  • 1Education Training Center, Ningxia Electric Power Company, Yinchuan, Ningxia 750011, P. R. China
E-mail:
The sorption of Zn(II) on γ-alumina was investigated as a function of contact time, pH, ionic strength, foreign ions, solid amount, humic acid (HA) and temperature by using batch technique. The results indicated that the sorption of Zn(II) onto γ-alumina was strongly dependent on pH and ionic strength. The sorption of Zn(II) increased slowly with increasing pH at pH 2-5, then increased sharply with pH increasing from 5 to 8.5, and at last maintained a maximum value at pH>8.5. A positive effect of HA on Zn(II) sorption was found at pH<7, whereas a negative effect was observed at pH>7. The thermodynamic data (ΔG°, ΔS°, ΔH°) were calculated from the temperature-dependent sorption isotherms, and the results suggested that the sorption of Zn(II) on γ-alumina was endothermic and spontaneous. The sorption results revealed that the γ-alumina can be as a cost-effective sorbent for pre-concentration of Zn(II) from large volumes of aqueous solutions in environmental pollution cleanup.
Keywords:Zn(II);γ-Alumina;Sorption;pH;Humic Acid;Thermodynamic Data
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