·58·化工环保ENVIRONMENTALPROTECTIONOFCHEMICALINDUSTRY2023年第43卷第1期三聚磷酸盐辅助电芬顿降解水中亚甲基蓝段任静，崔玉，杨宇航，丁鑫末，马迁，戴捷（长江大学化学与环境工程学院，湖北荆州434023）［摘要］以TiO2/Ti电极板为阳极、海绵状多孔金属泡沫镍为阴极、三聚磷酸盐（TPP）为电解质，构建了TPP-电芬顿体系，对水中亚甲基蓝（MB）进行降解。循环伏安测试结果表明，TPP具有提升电芬顿体系氧化性能的特质。在TPP与Fe2+的摩尔比为10∶3、TPP浓度为5.0mmol/L、初始pH为6、电流为200mA的优化条件下进行曝气反应，60min时MB去除率可达97.0%，360min时TOC去除率可达67.0%。而以Na2SO4为电解质的常规电芬顿体系在适宜pH下的MB去除率仅为55.0%。机理分析结果表明，·O2-是导致MB降解的主要活性氧物种，而·OH可促进MB不完全降解产物进一步矿化。［关键词］三聚磷酸盐；电芬顿；亚甲基蓝；自由基；降解机理［中图分类号］X791［文献标志码］A［文章编号］1006-1878（2023）01-0058-06［DOI］10.3969/j.issn.1006-1878.2023.01.009Degradationofmethyleneblueinwaterbytripolyphosphate-assistedelectro-FentonprocessDUANRenjing，CUIYu，YANGYuhang，DINGXinmo，MAQian，DAIJie（CollegeofChemicalandEnvironmentalEngineering，YangtzeUniversity，Jingzhou434023，China）Abstract：UsingTiO2/Tielectrodeplateasanode，spongyporousmetalnickelfoamascathodeandtripolyphosphate（TPP）aselectrolyte，TPP-electro-fentonsystemwasconstructedtodegrademethyleneblue（MB）inwater.CyclicvoltammetrytestresultsshowthatTPPhasthecharacteristicsofimprovingtheoxidationperformanceofelectro-Fentonsystem.WhentheaerationreactioniscarriedoutundertheoptimizedconditionsofmolarratioofTPPtoFe2+10∶3，TPPconcentration5.0mmol/L，initialpH6andcurrent200mA，theremovalrateofMBis97.0%at60min，andtheremovalrateofTOCis67.0%at360min.However，theremovalrateofMBinconventionalelectro-FentonsystemwithNa2SO4aselectrolyteisonlyabout55.0%attheappropriatepH.Theresultsofmechanismanalysisshowthat·O2-isthemainactiveoxygenspeciesleadingtothedegradationofMB，and·OHcanpromotefurthermineralizationoftheincompleteproductsinMBdegradation.Keywords：tripolyphosphate；electro-Fenton；methyleneblue；freeradical；d...
