催化臭氧氧化去除垃圾渗滤液中难降解有机物的研究  

THE CATALYTIC OZONATION OF REFRACTORY ORGANICS IN LANDFILL LEACHATE

作　　者：刘卫华[1] 季民[1] 张昕[1] 杨洁[1] 

机构地区：[1]天津大学环境科学与工程学院,天津300072

出　　处：《环境化学》2007年第1期58-61,共4页Environmental Chemistry

摘　　要：研究了Fe(Ⅱ),Mn(Ⅱ),Cu(Ⅱ)作用下,均相催化臭氧氧化去除垃圾渗滤液中高浓度的腐殖质.分析催化剂用量、溶液pH值对腐殖质催化臭氧氧化降解的影响.结果表明,与单纯臭氧氧化比较,催化臭氧氧化对UV254和色度去除率无明显改善,但可明显提高以TOC和CODCr表征的有机物去除率;当投加催化剂过量时,以TOC和CODCr表征的有机物去除率虽降低,但仍有促进作用.但Fe2+的过量投加将明显抑制UV254和色度的去除效果.在碱性条件下,催化臭氧氧化法具有更好的去除效果.三种催化剂催化效果为Cu(Ⅱ)>Mn(Ⅱ)>Fe(Ⅱ).采用Cu(Ⅱ)催化臭氧氧化处理实际渗滤液生化处理出水,对CODCr,色度和UV254都显示出较好的去除效果.Applying Fe（Ⅱ）, Mn（Ⅱ） and Cu（Ⅱ） fill leachate were studied. The effects of initial ions for catalytic ozonation of humic substance （HS） in land- pH values and catalyst dosage on HS removal efficiency were also analyzed. Results showed that hydrophobic humic substance was predominant in the effluent of landfill leachate treated by biological processes and accounted for 85 percent of dissolved organic matter. The result of this study also indicated that catalytic ozonation could be effective to remove TOC and CODcr but less effective to remove UV254and chroma compared with that achieved by ozonation alone. The best efficiency of catalysis was obtained at a moderate concentration of the catalyse and high initial pH value. The removal rate of TOC and CODCr decreased with excessive catalyst. And the removal efficiency of UV254 and chroma was restrained obviously with excessive Fe （Ⅱ）concentration. Cu （Ⅱ）among the catalysts has the best efficiency, and then Fe（Ⅱ）and Mn（Ⅱ） were better. The results suggested that catalytic ozonation with the presence of Cu（Ⅱ） ions was effective in removing CODcr, chroma and UV254 from landfill leachate.

关 键 词：垃圾渗滤液 有机物 腐殖质 催化臭氧氧化. 

分 类 号：X703[环境科学与工程—环境工程]