期刊
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
卷 29, 期 48, 页码 72556-72567出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-022-20817-7
关键词
Leachate; Harmless treatment; Persulfate activation; Mn2+; Tetracycline
资金
- Shandong Provincial Natural Science Foundation [ZR2021QB216, ZR2021QH281]
- Research Innovation Team of College of Chemistry and Environmental Science of Hebei University [hxkytd-py2104]
- Doctoral Foundation of Southwest University of Science and Technology [21zx7131]
This study established a TC removal system involving degradation and adsorption. By adding advanced oxidation agent sodium persulfate (SP) and biochar, the system achieved efficient removal of tetracycline from wastewater.
Advanced oxidation of antibiotic tetracycline (TC) is becoming an accessible and efficient technology. The removal of TC from the complex wastewater needs to be lucubrated. In this study, a TC removal system involving degradation and adsorption was established. TC degradation was accomplished by enhanced advanced oxidation via the addition of sodium persulfate (SP) and biochar into simulated wastewater containing Mn2+ and TC wastewater. The adsorption of TC and its derivatives was removed by biochar. The results indicate that the optimized reaction parameters were 3.0 g/L of biochar prepared at 600 degrees C (B600) and 400 mg/L of SP under acidic condition, and the removal percentage of TC was 87.48%, including 74.23% of degradation and 13.28% of adsorption; the anions Cl-, NO3-, and H2PO4- had negligible effects on the removal of TC in this Mn2+/B600/SP system. The system also functioned well with an aqueous solution with a high chemical oxygen demand (COD) concentration. Electron paramagnetic resonance (EPR) analysis indicated that center dot OH and SO4- free radicals were present in the Mn2+/B600/SP system. Based on the testing and analysis results, a removal mechanism and potential TC degradation pathway for this system were proposed. TC can be degraded by center dot OH and SO4- via three degradation pathways. Mn2+ can be precipitated as MnO2, and a part of the TC and its derivatives can be adsorbed on the biochar surface. The Mn2+/B600/SP system also performed satisfactorily for a complex aqueous solution with various cations and antibiotics.
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