Conversion of Fe-rich waste sludge into nano-flake Fe-SC hybrid Fenton-like catalyst for degradation of AOII.
Permanently increasing in the amount of sludge resulted in the serious environment burden. This work reports a novel carbothermal process for converting the Fe-rich waste sludge into cleaner nano-flake Fenton-like catalyst to relieve the crisis. The transformation of Fe species at different carbothermal temperature was evaluated by XRD analysis. SEM and XPS analyses were involved to characterize the morphology and chemical bonds of the catalysts. Results shown that the resulted catalyst carbonized at 800 °C (Fe-SC-800) was composed of Fe(0) and Fe3O4, performing nano-flake-like structure. The Fe-SC-800 has the highest catalytic activity in degradation of AOII in C0 = 200 mg/L. The efficiency achieves at 98% within 30 min at neutral pH, which is ascribed to the hydroxyl radical oxidation. Moreover, no iron is leached and the Fe-SC-800 could be recycled for three times at least. Thus, the Fe rich sludge could be reutilized as a valuable source for eco-friendly catalyst production, constituting an ecological way to manage these sludge wastes and eliminate the sludge and organic pollution to environment.
School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510275, PR China; Guangdong Provincial Key Laboratory of Radioactive Contamination Control and Resources, Guangzhou University, Guangzhou, 510275, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou, 510275, PR China.
Lingjun
L
Kong
School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510275, PR China.
Yuting
Y
Zhu
School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510275, PR China.
Mingxiang
M
Liu
School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510275, PR China; Guangdong Provincial Key Laboratory of Radioactive Contamination Control and Resources, Guangzhou University, Guangzhou, 510275, PR China.
Xiangyang
X
Chang
Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou, 510275, PR China.
Ya
Y
Xiong
School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510275, PR China; Guangdong Provincial Key Laboratory of Radioactive Contamination Control and Resources, Guangzhou University, Guangzhou, 510275, PR China. Electronic address: cdy@gzhu.edu.cn.
Diyun
D
Chen
D001391:Azo Compounds / Q000737:chemistry*; D002384:Catalysis; D006861:Hydrogen Peroxide / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007501:Iron / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D009281:Naphthalenes / Q000737:chemistry*; D010084:Oxidation-Reduction; D012037:Refuse Disposal / Q000379:methods; D012722:Sewage / Q000737:chemistry*
C456587:Acid Orange II; D001391:Azo Compounds; D009281:Naphthalenes; D012722:Sewage; D006861:Hydrogen Peroxide; D007501:Iron
AOII; Cleaner catalyst; Fenton oxidation; Nano-flake-like Fe-SC; Sludge resource