DOM的光化学活性及其对污染物光解的影响  

Photoreactivity of DOM and Its Effect on the Photo-transformation of Pollutants

作　　者：刘雪石 乔显亮[1] 刘远[1] 

机构地区：[1]大连理工大学环境学院工业生态与环境工程教育部重点实验室,辽宁大连116024

出　　处：《环境科学与技术》2017年第1期85-94,共10页Environmental Science & Technology

基　　金：国家自然科学基金(21277018)

摘　　要：溶解性有机质(dissolved organic matter,DOM)是自然水环境中重要的具有光化学活性的溶解性物质,是生态系统中碳循环的重要组成。DOM可以通过光化学转化生成多种活性物种,如激发三线态DOM、单线态氧、羟基自由基等,从而显著影响环境中重金属和有机污染物的光化学转化过程。该文综述了近些年关于DOM光致产生主要活性物种的机制及其对各种污染物光转化影响的研究进展,并对今后DOM的光化学研究提出了一些建议。Dissolved organic matter（DOM） widely exists as important photoreactive soluble material in natural waters,and plays an important role in the ecological carbon cycling.A variety of reactive species,such as triplet-excited DOM,singlet oxygen,hydroxyl radicals could be generated during photo-transformation of DOM,and pose significant effect on the photolysis process of heavy metals and organic pollutants.This paper reviews the progress in the generating pathways of major reactive species photoinduced by DOM and the influence of DOM on the photo-transformation of various pollutants in recent years.Some recommendations to the future research were briefly outlined.

关 键 词：溶解性有机质 光化学转化 活性物种 污染物 

分 类 号：X132[环境科学与工程—环境科学]