O3降解水杨羟肟酸选矿废水机理研究

Mechanism study on ozonization degradation of salicylhydroxamic acid in flotation wastewater

  • 摘要: 以新型浮选药剂水杨羟肟酸为研究对象,采用O3 氧化处理模拟选矿废水中的水杨羟肟 酸,并通过紫外光谱、红外光谱、高效液相色谱对水杨羟肟酸可能的降解途径进行分析推断。 结 果表明,O3 对水杨羟肟酸有较好去除效果。 当初始水杨羟肟酸浓度为50mg/L、pH值为8、O3 浓 度为1*3mg/L时,反应15min,水杨羟肟酸去除效率大于90 %,但矿化率仅为19*99 %;根据中 间产物检测结果推断,其降解途径为:水杨羟肟酸→水杨酸+羟胺→邻苯二酚→顺丁烯二酸→小 分子有机酸+二氧化碳+水。

     

    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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