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Comparison of UV and UV-LED activated sodium percarbonate for the degradation of O-desmethylvenlafaxine

Journal of Environmental Sciences 2023年第4期126卷 656-667页

作者： Jing Deng Anhong Cai Xiao Ling Qian Sun Tianxin Zhu Qingsong Li Xueyan Li Weizhu Chen College of Civil Engineering Zhejiang University of TechnologyHangzhou 310023China Affilicated Zhejiang Hospital Zhejiang University School of MedicineHangzhou 310013China Water Resources and Environmental Institute Xiamen University of TechnologyXiamen 361005China School of Environmental Science and Engineering Suzhou University of Science and TechnologySuzhou 215009China Third Institute of Oceanography Ministry of Natural ResourceXiamen 361005China

As an active metabolite of venlafaxine and emerging antidepressant,Odesmethylvenlafaxine(ODVEN) was widely detected in different water bodies,which caused potential harm to human health and environmental *** this study,the comparative work on the ODVEN degradation by UV(254 nm) and UV-LED(275 nm) activated sodium percarbonate(SPC) systems was systematically *** higher removal rate of ODVEN can be achieved under UV-LED direct photolysis(14.99%) than UV direct photolysis(4.57%) due to the higher values of photolysis coefficient at the wavelength *** synergistic effects were observed in the UV/SPC(80.38%) and UV-LED/SPC(53.57%) systems and the former exhibited better performance for the elimination of *** degradation of ODVEN all followed the pseudo-first-order kinetics well in these processes,and the pseudo-first-order rate constant(kobs) increased with increasing SPC *** quenching experiments demonstrated that both ·OH and CO_(3)·-were involved in the degradation of ODVEN and the second-order rate constant of ODVEN with CO_(3)·-(1.58 × 10^(8)(mol/L)-1sec-1) was reported for the first time based on competitive kinetic *** introduction of HA,Cl-,NO_(3)-and HCO_(3)-inhibited the ODVEN degradation to varying degrees in the both *** to quantum chemical calculation,radical addition at the ortho-position of the phenolic hydroxyl group was confirmed to be the main reaction pathways for the oxidation of ODVEN by·*** addition,the oxidation of ODVEN may involve the demethylation,H-abstraction,OH^(-)addition and C-N bond ***,the UV-LED/SPC process was considered to be more cost-effective compared to the UV/SPC process,although the UV/SPC process possessed a higher removal rate of ODVEN.

关键词： Advanced oxidation processes Sodium percarbonate Quantum chemical calculation Degradation pathways electrical energy per order

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