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黃鐵礦燒渣催化H-2O-2氧化廢水中難降解污染物
摘要：傳統(tǒng)Fenton氧化是以Fe~(2+)離子為催化劑進(jìn)行催化H_2O_2氧化,以含鐵礦物為催化劑的非均相類(lèi)Fenton反應(yīng)最近受到重視.以酸性紅B染料、苯酚等污染物以及實(shí)際工業(yè)廢水為處理對(duì)象,研究了黃鐵礦燒渣為催化劑的非均相類(lèi)Fenton反應(yīng).考察了催化劑、H_2O_2投加量、初始pH、反應(yīng)時(shí)間、催化劑回收重復(fù)利用等因素的影響和優(yōu)化.在燒渣投加量為10 g·L~(-1),雙氧水投加量為20 ml·L-1,體系pH在1～11范圍內(nèi),反應(yīng)6 h后,酸性紅B染料、苯酚的去除率接近100%,工業(yè)廢水處理后脫色效果明顯,而且BOD_5/COD比值能大幅提高.研究表明:黃鐵礦燒渣對(duì)催化H_2O_2氧化具有很強(qiáng)的催化活性,是有效的類(lèi)Fenton反應(yīng)催化劑,而且相比于單一含鐵礦物具有更好的催化性能,反應(yīng)受pH影響很小,解決了傳統(tǒng)Fenton反應(yīng)需要調(diào)節(jié)pH的難題.催化劑易于沉淀分離,能回收重復(fù)利用.Abstract：Traditional Fenton oxidation process uses ferrous iron (Fe~(2+)) as catalyst.Fenton-like reactions using iron minerals as heterogeneous catalysts has caught attention recently.However,Fenton-like reaction using pyrite cinder as catalyst was not reported in early research.The catalytic activity of pyrite cinder for pollutants oxidation was evaluated by using Acid Red B,phenol and industrial wastewater as model organic contaminants.The effect of catalyst and H_2O_2 dosage,initial pH,reaction time,reusability of catalyst on the oxidation was investigated.When the concentration of pyrite cinder and H_2O_2 dosage were 10 g·L~(-1) and 20 ml·L-1respectively,the removal efficiencies of Acid Red B and phenol were almost 100% in a broad range of pH value from 1 to 11.Obvious decolorization of industrial wastewater was observed within 6 h,and the ratio of BOD_5/COD increased greatly.The results indicated that unlike traditional Fenton reagent,the reaction of pyrite cinder with H_2O_2 could effectively catalyze the oxidation of organic contaminants at circumneutral pH.This process avoids the initial acidification.In addition,pyrite cinder exhibited higher activity than other pure iron oxide minerals.The catalyst could be easily recovered by sedimentation or filtration for further use. 作者： 吳德禮段冬馬魯銘 Author： WU Deli DUAN Dong MA Luming 作者單位： 同濟(jì)大學(xué)環(huán)境科學(xué)與工程學(xué)院,污染控制與資源化研究國(guó)家重點(diǎn)實(shí)驗(yàn)室,上海,200092 期 刊： 化工學(xué)報(bào) ISTICEIPKU Journal： CIESC JOURNAL 年，卷(期)： 2010, 61(4) 分類(lèi)號(hào)： X703 關(guān)鍵詞： 黃鐵礦燒渣 催化H_2O_2氧化 高級(jí)氧化 類(lèi)Fenton Keywords： pyrite cinder catalytic H_2O_2 oxidation advanced oxidation Fenton-like 機(jī)標(biāo)分類(lèi)號(hào)： X70 X78 機(jī)標(biāo)關(guān)鍵詞： 黃鐵礦燒渣 催化劑回收 Fenton氧化 工業(yè)廢水處理 難降解污染物 pyrite cinder organic contaminants Fenton反應(yīng) industrial wastewater oxidation Traditional Acid Red B 投加量 catalytic activity 重復(fù)利用 含鐵礦物 非均相類(lèi) initial Fenton reagent 酸性紅 基金項(xiàng)目： 國(guó)家自然科學(xué)基金，同濟(jì)大學(xué)優(yōu)秀青年人才資助計(jì)劃，上�？莆芯炕亟ㄔO(shè)項(xiàng)目【黃鐵礦燒渣催化H-2O-2氧化廢水中難降解污染物】相關(guān)文章：
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