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垃圾渗滤液中DOM组分的光催化处理研究

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摘要 为防止光催化处理过程中渗滤液的二次污染,有必要深入探讨垃圾渗滤液中DOM不同组分的光催化转化机制。研究了UV-TiO2光催化氧化降解垃圾渗滤液过程中溶解性有机物(DOM)不同组分的含量变化。结果表明:在适宜条件下,UV-TiO2光催化氧化降解垃圾渗滤液的色度、COD和DOC的去除率分别可达97%、75%和60%;处理过程中,BOD5/CODCr持续升高,由垃圾原液的0.092提高到72h光催化处理液的近0.4,说明光催化氧化处理大大改善了渗滤液的可生化性。渗滤液中DOM组分比例依次为:HOA〉HON〉HIA〉HIN〉HOB〉HIB;在72h处理液中依次为HIA〉HOA〉HIB〉HIN〉HON〉HOB;除HIA外,DOM其他组分在处理过程中含量均明显下降,但各组分下降到20mg/L左右时,趋于稳定;HIA组分含量变化很小,说明HIA难以光催化降解,是制约光催化氧化效率提高的主要因素。
作者 贾陈忠 刘松
出处 《长江大学学报(自科版)(上旬)》 CAS 2012年第10期19-21,25,共4页 JOURNAL OF YANGTZE UNIVERSITY (NATURAL SCIENCE EDITION) SCI & ENG
基金 [基金项目]生物地质与环境地质教育部重点实验室开放项目(BGEGF200820) 长江大学博士科研启动基金项目.
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