Tetracycline hydrochloride wastewater treatment by the synergetic process of iron-carbon micro-electrolysis and micro-nano-bubbles
CHEN Zhengbo1,, FU Min1,2,3,,, HU Xueli1, PAN Rui1, LU Peng1,2,3, WANG Ruiqi1,2,3 1.College of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067, China 2.Chongqing Key Laboratory of Catalysis and New Environmental Materials, Chongqing 400067, China 3.Key Laboratory of Catalysis Science & Technology of Chongqing Education Commission, Chongqing 400067, China
Abstract:Iron carbon micro-electrolysis in coordination with micro-nano-bubbles was used to treat tetracycline hydrochloride wastewater. The structures of iron carbon materials before and after reaction were characterized by XRD and FT-IR, the influences of different reaction time, iron carbon dosage, pH, and the amount of micro-nano-bubbles on the removal rate of tetracycline hydrochloride were studied, as well as the properties of first-order reaction kinetics. The results show that micro-nano-bubbles had a significant synergistic effect on iron carbon micro-electrolysis. At the reaction time of 120 min, the iron carbon dosage of 100 g·L?1, pH=3, and the MB air intake of 30 mL·min?1, the optimal degradation efficiency of tetracycline hydrochloride with the initial concentration of 20 mg·L?1 reached 80.84%, and TOC removal rate was 47.89%. The LC-MS analysis indicated that tetracycline hydrochloride decomposed to the products as m/z=194, m/z=181, and m/z=174, and finally converted into CO2 and H2O.The above research results can provide a useful reference for antibiotic wastewater treatment. Key words:micro-nano bubbles/ iron carbon micro-electrolysis/ tetracycline/ LC-MS.
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1.College of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067, China 2.Chongqing Key Laboratory of Catalysis and New Environmental Materials, Chongqing 400067, China 3.Key Laboratory of Catalysis Science & Technology of Chongqing Education Commission, Chongqing 400067, China Received Date: 2020-03-02 Accepted Date: 2020-05-03 Available Online: 2020-08-12 Keywords:micro-nano bubbles/ iron carbon micro-electrolysis/ tetracycline/ LC-MS Abstract:Iron carbon micro-electrolysis in coordination with micro-nano-bubbles was used to treat tetracycline hydrochloride wastewater. The structures of iron carbon materials before and after reaction were characterized by XRD and FT-IR, the influences of different reaction time, iron carbon dosage, pH, and the amount of micro-nano-bubbles on the removal rate of tetracycline hydrochloride were studied, as well as the properties of first-order reaction kinetics. The results show that micro-nano-bubbles had a significant synergistic effect on iron carbon micro-electrolysis. At the reaction time of 120 min, the iron carbon dosage of 100 g·L?1, pH=3, and the MB air intake of 30 mL·min?1, the optimal degradation efficiency of tetracycline hydrochloride with the initial concentration of 20 mg·L?1 reached 80.84%, and TOC removal rate was 47.89%. The LC-MS analysis indicated that tetracycline hydrochloride decomposed to the products as m/z=194, m/z=181, and m/z=174, and finally converted into CO2 and H2O.The above research results can provide a useful reference for antibiotic wastewater treatment.