화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.33, No.2, 638-648, February, 2016
DOI10.1007/s11814-015-0170-3  Export Citation
Sorption of Cr(VI) by MgAl-NO3 hydrotalcite in fixed-bed column:Experiments and prediction of breakthrough curves
Mohamed Khitous1, 2, †, Zineb Salem1, 3, and Djamila Halliche2
  • 1Laboratory of Process and Environmental Engineering LSGPI, Faculty of Mechanical and Process Engineering, University of Sciences and Technology, Houari Boumediene, BP 32 El-Allia, Bab Ezzouar, 16111 Algiers, Algeria
  • 2Laboratory of Natural Gas Chemistry, Institute of Chemistry, University of Sciences and Technology, Houari Boumediene, BP 32 El-Allia, Bab Ezzouar, 16111 Algiers, Algeria
  • 3, Algeria
E-mail:
This study describes the sorption of Cr(VI) by MgAl-NO3 hydrotalcite in a fixed-bed column. The sorbent was prepared via coprecipitation method and characterized by XRD, FTIR, BET surface area and pHzpc. The effects of operating parameters such as bed height, flow rate and inlet concentration were investigated in continuous mode. As a result, the exhaustion time increased with the increase of bed height, decrease of flow rate and inlet concentration. A mathematical model based on the constant pattern theory and the Freundlich isotherm was applied to predict the experimental data, and to evaluate the model parameters of the fixed-bed column. The developed model describes well the breakthrough curves at various operating conditions. The calculated volumetric mass transfer coefficient KLa depends directly on these conditions. KLa increased with increasing flow rate and inlet concentration, while remained almost constant with varying bed height.
Keywords:Fixed-bed Column;Cr(VI);Breakthrough Curve;Model;Sorption
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