Removal of Cr(VI) from aqueous solutions by the culm of bamboo grass treated with concentrated sulfuric acid |
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| Authors: | M Koroki S Saito H Hashimoto T Yamada Masakazu Aoyama |
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| Institution: | (1) Department of Applied and Environment Chemistry, Kitami Institute of Technology, 165 Koen-cho, Kitami 090-8507, Japan;(2) Graduate School of Science and Engineering, Saitama University, Saitama 338-8570, Japan; |
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| Abstract: | We prepared a carbonaceous sorbent for Cr(VI) from the culm of Sasa
kurilensis by dehydration with concentrated H2SO4. The removal of Cr(VI) by the sorbent was highly solution pH dependent and mainly governed by physicochemical sorption. The
equilibrium data fit well in the Langmuir isotherm model and indicate the endothermic nature of the Cr(VI) sorption. The desorption
experiments suggest that the Cr(VI) sorption is generally irreversible, owing to strong interaction of HCrO4− with the active sites of the sorbent. |
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