【摘要】 提取和分离了填埋场和焚烧厂渗滤液中的溶解性有机质,采用官能团滴定、紫外-可见吸收光谱、红外光谱和元素分析对其进行了表征.官能团滴定实验表明,渗滤液中总酸度和羧基官能团含量分别为:HyI>FA>HA和FA>HA>HyI,填埋场中各组分含量均小于焚烧厂中的相应组分;紫外-可见吸收光谱研究表明,填埋场渗滤液中各组分的芳香化程度均远大于焚烧厂中的相应组分,腐殖质的腐殖化程度依次为:C-HA>L-HA>I-HA和L-FA>I-FA;红外光谱分析表明,相同来源垃圾渗滤液的腐殖质在官能团和分子结构组成方面较为相似,L-HA比L-FA含有更多芳环结构,L-FA中含有更多酸性基团;元素分析表明,渗滤液腐殖质中N元素含量远高于其它环境腐殖质,并发现填埋场渗滤液中腐殖质的芳香化程度大于焚烧厂.更多还原

【Abstract】 The dissolved organic matter(DOM) was isolated and purified from landfill and incineration leachate,and all the isolated fractions were characterized using acid-base titration,UV-VIS(ultraviolet-visible),FTIR spectroscopic methods and element measurement.As shown by acid-base titration, the total acidity and carboxylic groups followed HyI>FA>HA and FA>HA>HyI respectively,and all the samples from incineration leachate had more acidity and carboxylic groups than those from landfill leachate.UV-VIS analysis showed that the humification of humics in leachate followed C-HA>L-HA>I-HA and L-FA>I-FA.FTIR spectroscopic indicated that the humics from the same leachate had similar molecular structure,and L-HA had more aromatic groups than L-FA,while L-FA had more acid groups.Element measurement indicated that the content of N in leachate humic substance was higher than that from other surroundings,and the aromatic content in humic substance from landfill leachate was higher than that from incineration leachate,which was also obtained by UV-VIS analysis.更多还原