Selective removal of Cr(VI) from aqueous solution by adsorption on mangosteen peel

Kai Huang, Yifan Xiu, Hongmin Zhu

研究成果: ジャーナルへの寄稿学術論文査読

25 被引用数 (Scopus)

抄録

Mangosteen peel, rich in polyphenolic compounds, was used to prepare the adsorbent exhibiting highly selective adsorption for Cr(VI) over other metal ions such as Pb2+, Fe3+, Zn2+, Cd2+, and Cr3+ at the pH values of 1∼4. The chemical modification method proposed by using calcium hydroxide is quite cost-effective and ecofriendly without using any toxic reagents or causing any secondary pollution. The adsorption isotherm results revealed that the adsorption of Cr(VI) on the gel fit well the Langmuir adsorption model, and the maximum adsorption capacity for Cr(VI) at pH levels 1, 2, 3, and 4 was evaluated to be 2.46, 2.44, 1.99, and 2.14 mol/kg, respectively. The adsorption mechanism for Cr(VI) on the saponified gel was verified to follow an esterifiaction reaction coupled with the reduction of Cr(VI) to Cr(III) in which H+ plays a role of promoter. Thus, modified mangosteen peel gel has the prominent selectivity and low cost for Cr(VI) removal.

本文言語英語
ページ(範囲)5930-5938
ページ数9
ジャーナルEnvironmental Science and Pollution Research
20
9
DOI
出版ステータス出版済み - 2013 9月

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