臭氧氧化对二级出水有机物(EfOM)特性机制的影响  

Effect of ozonation on characteristic transformation of effluent organic matter( EfOM)

作　　者：刘建红[1] 王利颖[1] 王保贵[1] 刘红[1] 郭瑾[1] 

机构地区：[1]北京工业大学环境与能源工程学院,北京100124

出　　处：《环境工程学报》2016年第3期1228-1234,共7页Chinese Journal of Environmental Engineering

基　　金：北京市教育委员会科技计划面上项目(KM201310005011);北京工业大学基础研究基金

摘　　要：开展了臭氧氧化对二级出水有机物(effluent organic matter,Ef OM)的去除效能研究,并进一步采用超滤分离、三维荧光光谱等方法,系统研究了不同臭氧投加量下,Ef OM的分子量分布、亲疏水特性以及荧光特性的变化规律。结果表明,臭氧化去除Ef OM的效果有限,但能够有效分解二级出水中具有强烈紫外吸收的有机物。此外,臭氧能优先氧化分解二级出水中大分子有机物,有效提高二级出水的可生化性。臭氧氧化过程中,分子质量(molecular weight,MW)>100 k Da的有机物组分被完全氧化分解,10 k Da<MW<100 k Da和1 k Da<MW<10 k D的有机物组分含量总体呈下降趋势,而MW<1k Da的有机物组分随臭氧投加时间的延长含量不断上升。臭氧化后,Ef OM中疏水组分减少,亲水组分升高;酸性组分减少。随着臭氧投量的增加,蛋白质与腐殖酸类物质的荧光吸收强度迅速下降。The removal efficiency of effluent organic matter（ Ef OM） by ozonation was investigated. Ultrafiltration separation and fluorescence excitation-emission matrix spectroscopy were used to study the effect of ozone dosage on the variation in Ef OM＇s molecular weight distribution,hydrophobicity-hydrophilicity,and fluorescence characteristics. The results revealed that ozonation had a limited effect on the removal of Ef OM,but it could effectively oxidize organic compounds with strong UV absorption. Ozonation could also decompose high molecule organic matter and improve the biodegradability of Ef OM. During ozonation,the organic matter with MW〉 100 k Da was completely decomposed,the content of organic matter with 10 k Da 〈MW〈 100 k Da and1 k Da 〈MW 10 k〈 Da also declined,and the content of organic matter with MW〈 1 k Da increased steadily as the oxidation time rose. After ozonation,the hydrophilic components in Ef OM increased,while the hydrophobic components and the acidic components decreased. The fluorescent intensities of protein-like and humic-like substances in Ef OM declined rapidly as the ozone dosage increased.

关 键 词：臭氧氧化 二级出水有机物 分子质量分布 亲疏水性 可生化性 荧光特性 

分 类 号：X703[环境科学与工程—环境工程]