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

作　　者：Shiyu Pan Bo Cao Deling Yuan Tifeng Jiao Qingrui Zhang Shoufeng Tang 

机构地区：[1]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

出　　处：《Chinese Chemical Letters》2024年第7期183-187,共5页中国化学快报（英文版）

基　　金：the supports from the National Natural Science Foundation of China(No.51908485);the Central Guidance on Local Science and Technology Development Fund of Hebei Province(No.226Z3603G);Hebei Province Foundation for Returnees(No.C20210502)。

摘　　要：To surmount the obstacles of traditional Fenton method and synchronously utilize Cu^(2+)and polyphenol in water,an improved Fenton-like reaction applying calcium peroxide(CaO_(2))as H_(2)O_(2)source and regulating by the complex of Cu^(2+)-tartaric acid(TA,a representative of polyphenol)was constructed.A typical antibiotic,metronidazole(MTZ)could be effectively eliminated by the Cu^(2+)/TA/CaO_(2)system,and the optimized parameters were as follows:0.1 mmol/L Cu^(2+),2 mmol/L TA,2 mmol/L CaO_(2),and initial pH5.UV spectrum confirmed the formation of Cu^(2+)-TA complex,which promoted the Cu^(2+)/Cu+circulation through decreasing the Cu^(2+)/Cu^(+) couple redox potential,which further enhanced the H_(2)O_(2)decomposition and the formation of reactive species.Hydroxyl radical was dominant for MTZ degradation,followed 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 p H 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.

关 键 词：Cupric ion Tartaric acid COMPLEXATION Calcium peroxide Metronidazole removal 

分 类 号：X703[环境科学与工程—环境工程] TQ031.7[化学工程]