Adsorption behaviour of Fe(II) and Cr(VI) on activated carbon: Surface chemistry, isotherm, kinetic and thermodynamic studies

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• 作者：Panya Maneechakr ; ^{panya.m@rsu.ac.th} ; Surachai Karnjanakom
• 关键词：Activated carbon ; Iron ; Chromium ; Adsorption isotherm ; Kinetic model ; Thermodynamic
• 刊名：The Journal of Chemical Thermodynamics
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：106
• 期：Complete
• 页码：104-112
• 全文大小：2246 K
• 卷排序：106

文摘

Activated carbon was prepared from carbonized carbon of Combretum quadrangulare Kurz as a new feedstock. Activated carbon prepared by physical activation was presented the negative surface charge resulting in high Fe2+ adsorption ability. Fe-modified activated carbon exhibited good efficiency on Cr2O72− adsorption. Adsorptions of Fe2+ and Cr2O72− using prepared adsorbents were fitted for Langmuir isotherm and pseudo-second-order kinetic models. Adsorption processes of Fe2+ and Cr2O72− were spontaneous and endothermic nature.