Fenton预处理对渗滤液中有机成份的影响研究

Effects of Fenton Pretreatment on Organic Constituents of Landfill Leachate

采用Fenton法对渗滤液进行预处理,并对处理前后的渗滤液进行了GC-MS分析。实验结果表明,Fenton处理渗滤液原液的反应条件为pH=3、m(H_(2)O_(2)):m(COD)=3:1、n(H_(2)O_(2)):n(Fe^(2+))=4:1、t=0.5 h时,COD从5262 mg/L降至1078 mg/L,BOD_(5)从680 mg/L降至345 mg/L,BOD_(5)/COD从0.129升至0.32,可生化程度明显提高;GC-MS测定结果显示,原液成分复杂,可检测出41种难降解大分子有机物,而Fenton处理后检测出9种有机物,其中具有生物毒性的邻苯二甲酸酯类99.93%被氧化分解。

Fenton method was adopted to pretreat the leachate.And untheated and treated leachates were analysed respectively through GC-MS.Experimental results indicated that the reaction condition was pH=3、m(H_(2)O_(2)):m(COD)=3:1、n(H_(2)O_(2)):n(Fe^(2+))=4:1、t=0.5 h.Under the condition,the concentration of COD decreased from 5262 to 1078 mg/L,the concentration of BOD_(5) decreased from 680 mg/L to 345 mg/L,the proportion of BOD_(5) to COD increased from 0.129 to 0.32,and the degree of biodegradability was significantly increased.GC-MS measurement results showed that the composition of raw leachate was complex,and 41 kinds of refractory and macromolecular organics could be detected.But only 9 kinds of organics were detected after Fenton treatment,and 99.93% of biotoxic phthalates were decomposed oxidatively.