Removal of arsenic from simulated groundwater by adsorption using iron-modified rice husk carbon

Son Van Dang; Junjiro Kawasaki; Leonila C. Abella; Joseph Auresenia; Hiroaki Habaki; Pag-asa D. Gaspillo; Hitoshi Kosuge; Hoa Thai Doan

doi:10.2965/jwet.2009.43

Original Paper

Removal of arsenic from simulated groundwater by adsorption using iron-modified rice husk carbon

Son Van Dang, Junjiro Kawasaki, Leonila C. Abella, Joseph Auresenia, Hiroaki Habaki, Pag-asa D. Gaspillo, Hitoshi Kosuge, Hoa Thai Doan

Author information

Son Van Dang
Department of Chemical Engineering, De La Salle University, Philippines
Department of Chemical Engineering, Tokyo Institute of Technology, Japan
Department of Chemical Technology, Hanoi University of Technology, Vietnam
Junjiro Kawasaki
Department of Chemical Engineering, Tokyo Institute of Technology, Japan
Leonila C. Abella
Department of Chemical Engineering, De La Salle University, Philippines
Joseph Auresenia
Department of Chemical Engineering, De La Salle University, Philippines
Hiroaki Habaki
Department of Chemical Engineering, Tokyo Institute of Technology, Japan
Pag-asa D. Gaspillo
Department of Chemical Engineering, Tokyo Institute of Technology, Japan
Hitoshi Kosuge
Department of Chemical Engineering, Tokyo Institute of Technology, Japan
Hoa Thai Doan
Department of Chemical Technology, Hanoi University of Technology, Vietnam

Keywords: Arsenate, Arsenite, Adsorption Isotherm, Adsorption Kinetics, Groundwater, Rice husk

JOURNAL FREE ACCESS

2009 Volume 7 Issue 2 Pages 43-56

DOI https://doi.org/10.2965/jwet.2009.43

Details

Abstract

This study focused on the removal of arsenic from simulated groundwater by batch adsorption using iron-modified rice husk carbon (RH-Fe). The results showed that RH-Fe was very effective in the removal of arsenic not only at low and moderate initial concentrations of arsenic (1.42 and 2.77 mg/L) but also at very high initial concentrations of arsenic (4.61 and 7.38 mg/L). The arsenic adsorption by RH-Fe was dependent on pH and varied with arsenic initial concentration and adsorbent dose. Langmuir isotherm could describe the adsorption equilibrium and the adsorption capacity was found to be 2.24mg/g. The pseudo-second order kinetic model gave the best fit with the experimental data.

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