再生水地下回灌去除溶解性有机物的三维荧光光谱分析  

Changes in DOM during groundwater recharging with reclaimed water using 3DEEM

作　　者：杨建[1,2] 成徐州[1] 常江[2] 甘一萍[2] 赵璇[1] 

机构地区：[1]清华大学核能与新能源技术研究院,北京100084 [2]北京城市排水集团有限责任公司,北京100022

出　　处：《清华大学学报（自然科学版）》2010年第9期1421-1424,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家"八六三"高技术项目(2007AA06Z338)

摘　　要：为了识别再生水人工地下回灌过程中所去除溶解性有机物(DOM)的类型和含量,利用"臭氧+砂滤+井灌"的再生水回灌系统,进行DOM三维荧光光谱(three-dimen-sional excitation/emission matrix,3DEEM)分析。结果表明:臭氧和砂滤使再生水中腐殖质类有机物的荧光光谱峰强度显著降低;再生水进入含水层后,48.71%的DOM被氧化去除;沿含水层继续运移,逐渐转化为还原环境,厌氧微生物为了维持其新陈代谢活性,将大分子DOM厌氧转化为小分子DOM。利用臭氧氧化作用和含水层降解作用,可有效地去除再生水中DOM。The types and amounts of removed dissolved organic matter（DOM） during artificial groundwater recharging with reclaimed water were studied using a three-dimensional excitation/emission matrix（3DEEM）of the DOM for each process effluent of an ozonation＋sand filtration＋well irrigation reclaimed water recharging system.The results show that ozonation and sand filtration greatly reduce the fluorescence intensities of the reclaimed water and that the removed DOM was mostly humus.After recharging into the aquifer,48.71% of the DOM was removed from the reclaimed water.Anaerobic conditions occured when reclaimed water flows into the aquifer.Anaerobic bacteria produced energy for metabolic processes wih large molecule DOM decomposed into small molecule DOM.Thus,ozonation and the aquifer together effectively remove DOM during reclaimed water recharging.

关 键 词：再生水 三维荧光光谱(3DEEM) 地下回灌 臭氧 砂滤 

分 类 号：X523[环境科学与工程—环境工程]