垃圾渗滤液处理工艺中有机污染物的三维荧光光谱_吉芳英

第3卷第10期环境工程学报Vol.3,No.102009年10月ChineseJournalofEnvironmentalEngineeringOct.2009垃圾渗滤液处理工艺中有机污染物的三维荧光光谱吉芳英1谢志刚1,2＊黄鹤1邱雪敏1(1.重庆大学三峡库区生态环境教育部重点实验室,重庆400045;2.重庆文理学院,重庆402160)摘要利用荧光发射和三维荧光光谱研究了三峡库区某垃圾堆场的渗滤液及其处理工艺出水溶解性有机质(DOM)的荧光光谱特性。堆场渗滤液的DOM含有类酪氨酸、色氨酸及紫外区类富里酸,特征荧光峰中心位于Ex/Em=275nm/305nm,为高激发波长类酪氨酸,与前人的研究结果并不一致,这可能与垃圾的堆放期有关。渗滤液和各处理工艺出水的荧光指数f450/500均大于1.9,表明腐殖质主要为微生物源。渗滤液在处理前后荧光峰特征和强度均发生明显改变,类蛋白荧光强度与DOC值变化趋势基本一致。生化处理工艺中,类蛋白荧光强度降低了66.4%～95.5%,紫外区类富里酸荧光强度只降低了28.8%,显示类蛋白质具有良好的可生化性,而类富里酸相对较难生化降解。三维荧光光谱能反映渗滤液处理过程中污染物的种类、性质和数量等变化信息,能快速地进行定性分析、定量评价。关键词荧光三维荧光光谱渗滤液溶解有机质中图分类号X132;O657.3文献标识码A文章编号1673-9108(2009)10-1783-06Threedimensionalexcitation-emissionfluorescencespectraofdissolvedorganicmatterinlandfillleachatestreatmentprocessJiFangying1XieZhigang1,2HuangHe1QiuXuemin1(1.KeyLaboratoryofThreeGorgesReservoirRegion'sEco-Environment,MinistryofEducation,ChongqingUniversity,Chongqing400045,China;2.ChongqingUniversityofArts＆Sciences,Chongqing402160,China)AbstractFluorescenceemissionandexcitationmatrix(EEM)areusedtocharacterizethedissolvedor-ganicmatter(DOM)oflandfillleachatesandeffluentsofthelandfillleachatestreatmentprocessofonecon-trolledtipinThreeGorgesReservoirRegion.Tyrosine-like,tryptophan-likeandUVfulvic-likearefoundintheDOMofthelandfillleachates.LandfillfluorescencepropertiesarecharacterizedbyintensefluorescenceatEx=275nm,andEm=305nmwhichwesuggestbehigh-excitationwavelengthtyrosine-likewhichisdifferentfromtheformerresearch.Thecauseoftheabovedifferencemaybehavingcorrelationwiththelandfillage.Fluores-cenceindexf450/500over1.9fromdifferentsamplingsitesshowsthatthehumicacidisderivedfrommicroorgan-isms.Thecentralpositionandintensityofthecharacteristicfluorescencepeaksoflandfillleachatesinthetreat-mentprocessvariedsignificantly.Thevariationtrendofprotein-likefluorescenceintensityisinaccordancewiththeDOCvalues.Inthebiochemicaltreatmentprocess,protein-likefluorescenceintensitywasreduced66.4%～95.5%,whiletheIAwasonlyreduced28.8%.Theresultsshowprotein-likewithbetterbiodegradationthanful-