title: Ultrasound enhanced heterogeneous activation of peroxydisulfate by bimetallic Fe-Co/GAC catalyst for the degradation of Acid Orange 7 in water.
abstract: Bimetallic Fe-Co/GAC (granular activated carbon) was prepared and used as heterogeneous catalyst in the ultrasound enhanced heterogeneous activation of peroxydisulfate (PS, S2O(2-)8) process. The effect of initial pH, PS concentration, catalyst addition and stirring rate on the decolorization of Acid Orange 7 (AO7) was investigated. The results showed that the decolorization efficiency increased with an increase in PS concentration from 0.3 to 0.5 g/L and an increase in catalyst amount from 0.5 to 0.8 g/L. But further increase in PS concentration and catalyst addition would result in an unpronounced increase in decolorization efficiency. In the range of 300 to 900 r/min, stirring rate had little effect on AO7 decolorization. The catalyst stability was evaluated by measuring decolorization efficiency for four successive cycles.
authors: Department of Environmental Engineering, Hubei Biomass-Resource Chemistry and Environmental Biotechnology Key Laboratory, Wuhan University, Wuhan 430079, China. Electronic address: caichun415@163.com.
authors: Chun
authors: C
authors: Cai
authors: Department of Environmental Engineering, Hubei Biomass-Resource Chemistry and Environmental Biotechnology Key Laboratory, Wuhan University, Wuhan 430079, China.
authors: Liguo
authors: L
authors: Wang
authors: Department of Environmental Engineering, Hubei Biomass-Resource Chemistry and Environmental Biotechnology Key Laboratory, Wuhan University, Wuhan 430079, China.
authors: Hong
authors: H
authors: Gao
authors: Department of Environmental Engineering, Hubei Biomass-Resource Chemistry and Environmental Biotechnology Key Laboratory, Wuhan University, Wuhan 430079, China.
authors: Liwei
authors: L
authors: Hou
authors: Department of Environmental Engineering, Hubei Biomass-Resource Chemistry and Environmental Biotechnology Key Laboratory, Wuhan University, Wuhan 430079, China. Electronic address: eeng@whu.edu.cn.
authors: Hui
authors: H
authors: Zhang
mesh_terms: D001391:Azo Compounds / Q000737:chemistry* / Q000528:radiation effects; D001557:Benzenesulfonates / Q000737:chemistry* / Q000528:radiation effects; D002244:Carbon; D002384:Catalysis; D013016:Sound; D013431:Sulfates / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000528:radiation effects
chemical_list: D001391:Azo Compounds; D001557:Benzenesulfonates; D013431:Sulfates; D014874:Water Pollutants, Chemical; D002244:Carbon; C014722:2-naphthol orange
keywords: Fe-Co/GAC; heterogeneous catalysis; peroxydisulfate; sulfate radicals; ultrasound