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1、第39卷第5期非金屬礦Vb1.39NO.52016年9月Non.MetallicMinesSeptember,2016赤泥基非均相催化劑類FentOn催化降解金橙Ⅱ邵魯華魏光濤李仲民張琳葉劉子涵張強(qiáng)(廣西大學(xué)化學(xué)化工學(xué)院,廣西南寧530004)摘要采用糖蜜酒精廢液協(xié)同H2804對(duì)赤泥進(jìn)行酸化改性,再經(jīng)高溫焙燒處理,得到赤泥基非均相催化劑(SMA-CA/赤泥),通過XRD、EDS、N,吸附脫附技術(shù)對(duì)SMA-CA/赤泥進(jìn)行了表征,并將其用于金橙Ⅱ的類Fenton催化降解。表征結(jié)果顯示:經(jīng)酸化和焙燒,赤泥中的a-FeOOH轉(zhuǎn)變?yōu)镾MA—CA/赤泥中的a-FeO,且
2、酸化改性使得SMA—CA/赤泥堿含量顯著降低;與未添加糖蜜酒精廢液酸化改性的赤泥基非均相催化劑相比,SMA.CA/赤泥的孔徑增大,大孔分布提高。實(shí)驗(yàn)結(jié)果表明:在初始溶液pH值為3、H2O投加量50mmol/L、金橙1I質(zhì)量濃度4omg/L、反應(yīng)時(shí)間6h的條件下,金橙1I去除率達(dá)到86.79%;該催化降解過程符合一級(jí)動(dòng)力學(xué)模型。關(guān)鍵詞赤泥;糖蜜酒精廢液;酸化;焙燒;類Fenton;金橙Ⅱ中圖分類號(hào):X703.1文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):1000-8098(2016)05-0023-04CatalyticDegradationofOrangeIIinFenton-
3、likeProcessCatalyzedbyRedMud—basedHeterogeneousCatalystShaoLuhuaWeiGuangtaoLiZhongminZhangLinye’LiuZihanZhangQiang(SchoolofChemistryandChemicalEngineering,GuangxiUniversity,Nanning,Guangxi530004)AbstractRedmudwasfirstlyacidifiedbyH2SO4andmolassesalcoholwastewater,andthencalcinedtoo
4、btainaredmud—basedheterogeneouscatalyst,i.e.SMA—CA/redmud.TheSMA—CA/redmudwascharacterizedbyXRD,EDSandN2adsorption-desorption,andthenwasusedfordegradationoforangeⅡinFenton—likeprocess.Thecharacterizationresultsshowedthataftertheacidificationandcalcination.a(chǎn)—FeOOHinredmudwaschangedi
5、ntoⅡ一Fe203ofSMA—CA/redmud,andthealkalinecompoundsinSMA—CA/redmudwereeffectivelyreduced.Comparedwiththatofredmud—basedheterogeneouscatalystwhichwasacidifiedwithoutmolassesalcoholwastewater,theporediameterandthemacroporedistributionofSMA.CA/redmudallincreased.Theexperimentalresultssh
6、owedthattheremovalrateoforange/Ireached86.79%undertheconditionsofinitialconcentrationoforangeII40mgm,initialconcentrationofH2O250mmol/L,solutionpHvalue3,reactiontime6h.Thedegradationreactionaccordedwjfhthefirst—orderkineticsmode1.Keywordsredmud;molassesalcoholwastewater;acidificati
7、on;calcination;Fenton—like;orangeⅡ染料廢水主要來自紡織工業(yè)及染料制造業(yè),具以上,這一特性為拜耳法赤泥制備非均相類Fenton有色度高、水質(zhì)復(fù)雜、COD值高、難生物降解等特點(diǎn),催化劑提供了可能[1510但赤泥自身的堿性不利于類其處理一直是環(huán)保產(chǎn)業(yè)中的熱點(diǎn)話題l1-3]o高級(jí)氧化Fenton反應(yīng)的進(jìn)行,且應(yīng)用中堿性物質(zhì)浸出易對(duì)水體法是處理染料廢水可行的方法之一]。其中,芬頓環(huán)境形成堿性污染。因此,以拜耳赤泥制備類Fenton(Fenton)氧化法由于具有高效、穩(wěn)定、污染物降解相對(duì)催化劑需要進(jìn)行脫堿改性處理。目前,酸中和法仍為徹底
8、等優(yōu)勢而被廣泛應(yīng)用[7-9]o但是均相Fenton法