首页|Synergistic Fe2+/UV activated peroxydisulfate as an efficient method for the degradation of thiacloprid
Synergistic Fe2+/UV activated peroxydisulfate as an efficient method for the degradation of thiacloprid
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NSTL
Elsevier
Increasing usage and emission of neonicotinoid insecticides have caused severe risks to ecological en-vironment and human health. The study aimed to explore a Fe2+/UV/ peroxydisulfate (PDS) system for effective degradation of thiacloprid (TCP). The effects of various parameters involving the degradation ef-ficiency including initial solution pH, PDS concentration, Fe2+ concentration, and UV power were in-vestigated. Under the optimized conditions (pH 3.0, PDS concentration of 1 mmol L-1, Fe2+ concentration of 0.36 mmol L-1, and UV power of 45 W), it was observed that 97.5% of TCP was degraded with a pseudo-first-order kinetics reaction constant of 5.63 x 10(-2) min(-1). The Fe2+/UV/PDS system demonstrated excellent performance on reaction stoichiometry efficiency (RSE) (31.25%, 60 min). Meanwhile, the effects of in-organic anions (Cl-, NO3- and HCO3-) and natural organic matter (humic acid) on the removal of TCP were also investigated. In addition, the free radical scavenging experiments indicated that SO4 center dot- was dominant in the Fe2+/UV/PDS system. The intermediates were identified and their toxicity was notably lower than that of TCP. Therefore, the Fe2+/UV/PDS system is efficient and ecologically safe for TCP removal from wastewater.(C) 2022 Institution of Chemical Engineers. Published by Elsevier Ltd. All rights reserved.
NSTL
Elsevier
