Mechanism study on ozonization degradation of salicylhydroxamic acid in flotation wastewater
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Graphical Abstract
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Abstract
Salicylhydroxamicacidisanovelflotationreagent,thispaperstudiedO3oxidationtreatment ofsalicylhydroxamicacidinsimulatedflotationwastewater*Meanwhile,thepossibledegradationpathway ofsalicylichydroxamicacidwasdeducedthroughultravioletspectrophotometry,infraredspectrumand highperformanceliquidchromatography*Theexperimentalresultsshowedthattheremovalefficiencyof salicylichydroxamicacidtreatedbyO3 oxidationwasobviously*Wheninitialconcentrationofsalicyl⁃ hydroxamicwas50mg/L,pHvaluewas8,ozoneconcentrationwas1*3mg/Landreactiontimewas 15min,theremovalratewasgreaterthan90%,butthemineralizationratewasjust19*99%*Through theanalysisofintermediates,thedegradationpathwayofsalicylhydroxamicacidwaspreliminarilycon⁃ cludedas:salicylhydroxamicacid→salicylicacid+hydroxylamine→catechol→maleic→smallmole⁃ culeorganicacid+carbondioxide+water*
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