Complexes of cupric ion and tartaric acid enhanced calcium peroxide Fenton-like reaction for metronidazole degradation

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外文摘要：To surmount the obstacles of traditional Fenton method and synchronously utilize Cu2+ and polyphe-nol in water,an improved Fenton-like reaction applying calcium peroxide(CaO2)as H2O2 source and regulating by the complex of Cu2+-tartaric acid(TA,a representative of polyphenol)was constructed.A typical antibiotic,metronidazole(MTZ)could be effectively eliminated by the Cu2+/TA/CaO2 system,and the optimized parameters were as follows:0.1mmol/L Cu2+,2mmol/L TA,2mmol/L CaO2,and initial pH 5.UV spectrum confirmed the formation of Cu2+-TA complex,which promoted the Cu2+/Cu+ circulation through decreasing the Cu2+/Cu+ couple redox potential,which further enhanced the H2O2 decompo-sition and the formation of reactive species.Hydroxyl radical was dominant for MTZ degradation,fol-lowed by oxygen and superoxide radical.The degradation intermediates of MTZ were detected and their evolution way was speculated.Furthermore,the ternary process showed a wide pH tolerance(3-8)for removing MTZ and broad applicability for eliminating other dyes and antibiotics.This work provided a reference for Cu-based Fenton-like strategy for organic wastewater settlement.

外文关键词：

Cupric ionTartaric acidComplexationCalcium peroxideMetronidazole removal

作者：

Shiyu Pan、Bo Cao、Deling Yuan、Tifeng Jiao、Qingrui Zhang、Shoufeng Tang

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作者单位：

State Key Laboratory of Metastable Materials Science and Technology,Hebei Key Laboratory of Heavy Metal Deep-Remediation in Water and Resource Reuse,School of Environmental and Chemical Engineering,Yanshan University,Qinhuangdao 066004,China

基金：

National Natural Science Foundation of ChinaCentral Guidance on Local Science and Technology Development Fund of Hebei ProvinceHebei Province Foundation for Returnees

项目编号：

51908485226Z3603GC20210502

出版年：

2024

DOI：

10.1016/j.cclet.2023.109185

中国化学快报(英文版)

中国化学会

中国化学快报(英文版)

CSTPCD

影响因子：0.771

ISSN：1001-8417

年,卷(期)：2024.35(7)