DENG Lin, ZOU Zhiyan, ZENG Hanxuan, SHI Zhou, ZHANG Wen. Degradation of rhodamine B in aqueous solution by PMS activated with activated carbon loaded with Co-Fe ferrite[J]. Chinese Journal of Environmental Engineering, 2018, 12(5): 1372-1381. doi: 10.12030/j.cjee.201710004
Citation:
DENG Lin, ZOU Zhiyan, ZENG Hanxuan, SHI Zhou, ZHANG Wen. Degradation of rhodamine B in aqueous solution by PMS activated with activated carbon loaded with Co-Fe ferrite[J]. Chinese Journal of Environmental Engineering, 2018, 12(5): 1372-1381. doi: 10.12030/j.cjee.201710004
Abstract:
A magnetic activated carbon coating Co-Fe ferrite (CoFe2O4@AC) was synthesized through coprecipitation method and used to activate peroxymonosulfate(PMS) to generate sulfate radicals (SO4-·) for the degradation of rhodamine B (RhB). The physico-chemical properties of the composite was characterized using SEM, HR-TEM, XRD, FTIR, XPS analyses. Effects of PMS dosage, RhB concentration, initial pH and temperature on RhB degradation were discussed systematically. Experiments results showed that CoFe2O4@AC/PMS system exhibited a higher degradation efficiency for RhB than AC/PMS and CoFe2O4/PMS systems, and adapted to a wide solution pH range from 5.0 to 9.0. The degradation rate of RhB increased rapidly with increasing temperature, and the activation energy was calculated to be 67.46 kJ·mol-1. Mechanism study indicated that both the AC and Co(II) in the composite participated in activating PMS to produce ·OH and SO4-· radicals. In a word, the novel catalyst have a bright prospects in dyes treatment not only because of its efficient catalytic effect but also the characteristic of easily separated from water.
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Abstract: A magnetic activated carbon coating Co-Fe ferrite (CoFe2O4@AC) was synthesized through coprecipitation method and used to activate peroxymonosulfate(PMS) to generate sulfate radicals (SO4-·) for the degradation of rhodamine B (RhB). The physico-chemical properties of the composite was characterized using SEM, HR-TEM, XRD, FTIR, XPS analyses. Effects of PMS dosage, RhB concentration, initial pH and temperature on RhB degradation were discussed systematically. Experiments results showed that CoFe2O4@AC/PMS system exhibited a higher degradation efficiency for RhB than AC/PMS and CoFe2O4/PMS systems, and adapted to a wide solution pH range from 5.0 to 9.0. The degradation rate of RhB increased rapidly with increasing temperature, and the activation energy was calculated to be 67.46 kJ·mol-1. Mechanism study indicated that both the AC and Co(II) in the composite participated in activating PMS to produce ·OH and SO4-· radicals. In a word, the novel catalyst have a bright prospects in dyes treatment not only because of its efficient catalytic effect but also the characteristic of easily separated from water.
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