Rice husk (RH) is a very effective natural adsorbent for fast removal of heavy metal cations from water solutions. Application of RH for removal of some heavy metal ions, such as Ni, Zn, Mn, Co, Cu, Pb and Cd from water solutions has been studied and different maximum adsorption capacities and a variety of optimized conditions were reported in the literature. In this work, the efficiency of RH harvested from different climatic regions was studied. For this proposal, different RH samples were collected from three different climatic regions of Iran (nominated as RH1 to RH3); their removal efficiencies of heavy metal cations of Ni2+, Cu2+ and Cd2+ were investigated and compared. The adsorption data at optimum conditions could be assessed well by both Langmuir and Freundlich models. Statistical analysis of the results of adsorption isotherms showed that different RH samples have different efficiencies in uptake of these heavy metal ions. The RH samples were characterized using Fourier transform infrared spectroscopy and Boehm titration, which indicated that amounts of functional groups differed between RHs that are grown in different climatic conditions.
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Research Article|
May 01 2012
Comparison of surface functional groups and metal uptake efficiency of rice husk harvested from different climatic zones
Amir Hossein Matin;
Amir Hossein Matin
1Department of Science, Faculty of Health, Safety and Environment, Shahid Beheshti University of Medical Sciences, P.O. Box 16858-116, Tehran, Iran
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Shokooh Sadat Khaloo;
2Department of Science, Faculty of Health, Safety and Environment, Shahid Beheshti University, M.C., P.O. Box 16858-116, Tehran, Iran
E-mail: sh_khaloo@sbmu.ac.ir
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Abbas Akbarzadeh;
Abbas Akbarzadeh
3Water Research Institute, Iranian Ministry of Energy, P.O. Box 16765-313, Tehran, Iran
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Mohammad Riahi
Mohammad Riahi
3Water Research Institute, Iranian Ministry of Energy, P.O. Box 16765-313, Tehran, Iran
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Water Sci Technol (2012) 65 (10): 1738–1744.
Article history
Received:
October 31 2011
Accepted:
January 05 2012
Citation
Amir Hossein Matin, Shokooh Sadat Khaloo, Abbas Akbarzadeh, Mohammad Riahi; Comparison of surface functional groups and metal uptake efficiency of rice husk harvested from different climatic zones. Water Sci Technol 1 May 2012; 65 (10): 1738–1744. doi: https://doi.org/10.2166/wst.2012.066
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