摘要：采用(yong)鈦基氧(yang)化(hua)(hua)(hua)物涂層(ceng)材料(Ti/SnO2-Sb2O5)為(wei)陽(yang)(yang)極(ji)(ji)(ji)，石墨(mo)為(wei)陰(yin)極(ji)(ji)(ji)，在(zai)含Fe2+和(he)不含Fe2+2種電(dian)(dian)(dian)解(jie)(jie)質條(tiao)件下研(yan)究了苯(ben)胺(an)的(de)電(dian)(dian)(dian)化(hua)(hua)(hua)學(xue)氧(yang)化(hua)(hua)(hua)降(jiang)(jiang)解(jie)(jie)效(xiao)(xiao)率(lv)和(he)機制。結(jie)果表(biao)明，Ti/SnO2-Sb2O5陽(yang)(yang)極(ji)(ji)(ji)氧(yang)化(hua)(hua)(hua)降(jiang)(jiang)解(jie)(jie)有機物的(de)電(dian)(dian)(dian)位(wei)約2.0V±0.1V，而石墨(mo)陰(yin)極(ji)(ji)(ji)還原O2生成H2O2的(de)優化(hua)(hua)(hua)電(dian)(dian)(dian)位(wei)為(wei)-0.65V。H2O2單(dan)獨作(zuo)用(yong)不能(neng)氧(yang)化(hua)(hua)(hua)苯(ben)胺(an)，當電(dian)(dian)(dian)解(jie)(jie)質中不存在(zai)Fe2+時，苯(ben)胺(an)的(de)降(jiang)(jiang)解(jie)(jie)主要依賴于陽(yang)(yang)極(ji)(ji)(ji)氧(yang)化(hua)(hua)(hua)作(zuo)用(yong)；而當電(dian)(dian)(dian)解(jie)(jie)質中存在(zai)Fe2+時，陰(yin)極(ji)(ji)(ji)電(dian)(dian)(dian)Fenton氧(yang)化(hua)(hua)(hua)和(he)陽(yang)(yang)極(ji)(ji)(ji)氧(yang)化(hua)(hua)(hua)(雙極(ji)(ji)(ji)電(dian)(dian)(dian)化(hua)(hua)(hua)學(xue)氧(yang)化(hua)(hua)(hua))均能(neng)有效(xiao)(xiao)降(jiang)(jiang)解(jie)(jie)水(shui)中苯(ben)胺(an)，但前者作(zuo)用(yong)更大。在(zai)陰(yin)極(ji)(ji)(ji)電(dian)(dian)(dian)位(wei)為(wei)-0.65V、初始pH值3.0、初始Fe2+濃度為(wei)0.5mmol·L-1條(tiao)件下，處(chu)理180mg·L-1苯(ben)胺(an)水(shui)溶液10h，COD的(de)去除率(lv)為(wei)77.5%，去除COD的(de)電(dian)(dian)(dian)流效(xiao)(xiao)率(lv)達到97.8%。該研(yan)究表(biao)明，以Ti/SnO2-Sb2O5為(wei)陽(yang)(yang)極(ji)(ji)(ji)，控(kong)制合(he)理的(de)陽(yang)(yang)極(ji)(ji)(ji)和(he)陰(yin)極(ji)(ji)(ji)電(dian)(dian)(dian)位(wei)，可以實現雙極(ji)(ji)(ji)電(dian)(dian)(dian)化(hua)(hua)(hua)學(xue)氧(yang)化(hua)(hua)(hua)有效(xiao)(xiao)降(jiang)(jiang)解(jie)(jie)水(shui)中有機物，并且獲得較高的(de)電(dian)(dian)(dian)流效(xiao)(xiao)率(lv)。

關(guan)鍵詞：鈦基涂層陽極，陽極氧(yang)化，電Fenton氧(yang)化，苯胺，降解

近(jin)年來采用(yong)(yong)電(dian)(dian)(dian)(dian)化(hua)(hua)學(xue)(xue)技術降(jiang)(jiang)解(jie)水(shui)中(zhong)(zhong)有機(ji)(ji)物已(yi)成(cheng)(cheng)為污水(shui)處理領域的(de)(de)(de)(de)重要研(yan)(yan)究(jiu)方向(xiang)。在(zai)眾多(duo)研(yan)(yan)究(jiu)中(zhong)(zhong)，關于電(dian)(dian)(dian)(dian)化(hua)(hua)學(xue)(xue)陽(yang)極(ji)(ji)(ji)(ji)氧(yang)化(hua)(hua)和(he)陰(yin)極(ji)(ji)(ji)(ji)電(dian)(dian)(dian)(dian)Fendon氧(yang)化(hua)(hua)降(jiang)(jiang)解(jie)有機(ji)(ji)污染物的(de)(de)(de)(de)研(yan)(yan)究(jiu)最為廣泛。陰(yin)極(ji)(ji)(ji)(ji)電(dian)(dian)(dian)(dian)Fendon氧(yang)化(hua)(hua)主要采用(yong)(yong)合適的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)極(ji)(ji)(ji)(ji)材料（如石墨。活性(xing)炭(tan)纖維和(he)氣(qi)體擴散電(dian)(dian)(dian)(dian)極(ji)(ji)(ji)(ji)等(deng)）利用(yong)(yong)O2在(zai)陰(yin)極(ji)(ji)(ji)(ji)還原生(sheng)成(cheng)(cheng)H2O2，并(bing)使之與外(wai)部(bu)投加的(de)(de)(de)(de)Fe2+，發生(sheng)Fendon反(fan)(fan)應(ying)，生(sheng)成(cheng)(cheng)具有強氧(yang)化(hua)(hua)性(xing)的(de)(de)(de)(de)·OH破(po)壞有機(ji)(ji)物；而(er)電(dian)(dian)(dian)(dian)化(hua)(hua)學(xue)(xue)陽(yang)極(ji)(ji)(ji)(ji)氧(yang)化(hua)(hua)則(ze)(ze)利用(yong)(yong)各(ge)類陽(yang)極(ji)(ji)(ji)(ji)產生(sheng)的(de)(de)(de)(de)·OH、高(gao)價(jia)態氧(yang)化(hua)(hua)物或有效氯等(deng)強氧(yang)化(hua)(hua)性(xing)物種將水(shui)中(zhong)(zhong)有機(ji)(ji)物降(jiang)(jiang)解(jie)。目前實(shi)(shi)驗室研(yan)(yan)究(jiu)結果(guo)表(biao)明(ming)上述2種電(dian)(dian)(dian)(dian)化(hua)(hua)學(xue)(xue)氧(yang)化(hua)(hua)技術均(jun)能(neng)有效降(jiang)(jiang)解(jie)水(shui)中(zhong)(zhong)有機(ji)(ji)物，然而(er)從實(shi)(shi)際應(ying)用(yong)(yong)出(chu)發，陽(yang)極(ji)(ji)(ji)(ji)氧(yang)化(hua)(hua)存在(zai)電(dian)(dian)(dian)(dian)流效率低、能(neng)耗(hao)高(gao)的(de)(de)(de)(de)缺點；電(dian)(dian)(dian)(dian)Fendon氧(yang)化(hua)(hua)同樣存在(zai)電(dian)(dian)(dian)(dian)流不(bu)能(neng)充分(fen)利用(yong)(yong)，且(qie)如果(guo)使用(yong)(yong)純氧(yang)產生(sheng)H2O2則(ze)(ze)成(cheng)(cheng)本過高(gao)的(de)(de)(de)(de)缺陷(xian)。盡管(guan)在(zai)電(dian)(dian)(dian)(dian)解(jie)系統中(zhong)(zhong)陽(yang)極(ji)(ji)(ji)(ji)反(fan)(fan)應(ying)和(he)陰(yin)極(ji)(ji)(ji)(ji)反(fan)(fan)應(ying)同時發生(sheng)，但目前研(yan)(yan)究(jiu)主要考(kao)察工作電(dian)(dian)(dian)(dian)極(ji)(ji)(ji)(ji)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)化(hua)(hua)學(xue)(xue)反(fan)(fan)應(ying)過程(cheng)，沒有充分(fen)發揮對電(dian)(dian)(dian)(dian)極(ji)(ji)(ji)(ji)降(jiang)(jiang)解(jie)有機(ji)(ji)物的(de)(de)(de)(de)作用(yong)(yong)，析氫或析氧(yang)副反(fan)(fan)應(ying)的(de)(de)(de)(de)抑制(zhi)亦不(bu)理想，因此(ci)導致電(dian)(dian)(dian)(dian)流效率不(bu)高(gao)。若能(neng)在(zai)陰(yin)極(ji)(ji)(ji)(ji)高(gao)效產生(sheng)H2O2的(de)(de)(de)(de)同時控制(zhi)合理的(de)(de)(de)(de)陽(yang)極(ji)(ji)(ji)(ji)電(dian)(dian)(dian)(dian)位，當介質(zhi)中(zhong)(zhong)存在(zai)Fe2+時則(ze)(ze)可(ke)實(shi)(shi)現陰(yin)極(ji)(ji)(ji)(ji)電(dian)(dian)(dian)(dian)Fendon和(he)陽(yang)極(ji)(ji)(ji)(ji)氧(yang)化(hua)(hua)協同降(jiang)(jiang)解(jie)有機(ji)(ji)物(即雙極(ji)(ji)(ji)(ji)電(dian)(dian)(dian)(dian)化(hua)(hua)學(xue)(xue)氧(yang)化(hua)(hua))，并(bing)大幅度提高(gao)電(dian)(dian)(dian)(dian)流效率。

本研究以石(shi)墨為陰極(ji)（工(gong)作電(dian)(dian)(dian)極(ji)）、Ti/SnO2-Sb2O5(對電(dian)(dian)(dian)極(ji))為陽(yang)極(ji)，以空氣(qi)為氧源，在恒電(dian)(dian)(dian)位模式下系統分析了苯胺降解的效率(lv)、相關(guan)規律和機制(zhi)，力圖在較(jiao)高電(dian)(dian)(dian)流效率(lv)下實現(xian)雙極(ji)電(dian)(dian)(dian)化學氧化降解有機污染物。

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