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- W4303647221 abstract "BACKGROUND The spent bleaching earth (SBE) is a solid waste produced during the refining of vegetable oil, with features of high residual oil and difficult disposal. At present, pollution control by the treatment of waste is a hot issue to attract more and more attention. This study used SBE as the raw materials and developed a new type of iron-carbon composite (FexOy/[email protected]) by loading iron on spent bleaching earth carbon ([email protected]) to remove Cr(VI) in water. [email protected] was obtained by the pyrolysis of SBE. RESULTS The behavior mechanism and factor analysis of FexOy/[email protected] for Cr(VI) removal in water were investigated for the first time. At first, one-factor experiments in the preparation process were adopted to obtain FexOy/[email protected] with optimal performance. By characterization analysis of the optimal FexOy/[email protected] before and after Cr(VI) removal, it was found that the Cr(VI) removal mechanism was adsorption followed by reduction. Specifically, the adsorption kinetic and isotherm behaviors of FexOy/[email protected] for Cr(VI) belong to the pseudo-second-order kinetic model and Langmuir isotherm, respectively. Cr(VI) removal by FexOy/[email protected] is spontaneous (△G<0) and endothermic (△H>0). The presence of coexisting anions (i.e., BrO3− < SO42− < PO43−) and the increase of pH (only adsorption at pH>7) are not conductive to Cr(VI) removal by FexOy/[email protected] Fortunately, N2 atmospheres can promote Cr(VI) removal (~100%) that is significantly higher than those in air atmosphere (63.34%) and natural conditions (82.25%). CONCLUSION Overall, FexOy/[email protected] has the satisfactory Cr(VI) removal performance through physical adsorption and chemical reduction, and exhibits great potential application value in Cr(VI) elimination from water. © 2022 Society of Chemical Industry." @default.
- W4303647221 created "2022-10-08" @default.
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- W4303647221 date "2022-10-28" @default.
- W4303647221 modified "2023-10-16" @default.
- W4303647221 title "Effective removal of Cr( <scp>VI</scp> ) from aqueous solution by iron‐carbonized solid waste composite: behavior mechanism and factor analysis" @default.
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- W4303647221 doi "https://doi.org/10.1002/jctb.7251" @default.
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