浒苔释放有色溶解有机物的光降解研究  

Research on Photodegradation of Chromophoric Dissolved Organic Matter Released by Ulva prolifera

作　　者：孙一鑫 王嘉旋 宋可心 冯志华 张涛 SUN Yixin;WANG Jiaxuan;SONG Kexin;FENG Zhihua;ZHANG Tao(Jiangsu Key Laboratory of Marine Bio-resources and Environment,Jiangsu Ocean University,Lianyungang 222005,China;Jiangsu Key Laboratory of Marine Biotechnology,Jiangsu Ocean University,Lianyungang 222005,China;Co-innovation Center of Jiangsu Marine Bio-industry Technology,Lianyungang 222005,China)

机构地区：[1]江苏海洋大学江苏省海洋生物资源与环境重点实验室,江苏连云港222005 [2]江苏海洋大学江苏省海洋生物技术重点实验室,江苏连云港222005 [3]江苏省海洋生物产业技术协同创新中心,江苏连云港222005

出　　处：《江苏海洋大学学报（自然科学版）》2020年第2期27-32,共6页Journal of Jiangsu Ocean University:Natural Science Edition

基　　金：江苏海洋大学江苏省海洋生物技术重点实验室开放课题(HS2019005);江苏省海洋科学与技术优势学科项目;江苏省研究生科研与实践创新计划项目(SJCX20_1286)。

摘　　要：浒苔(Ulva prolifera)在爆发末期会凋亡并释放大量溶解有机物(dissolved organic matter,DOM)。细菌可以降解大部分生物活性DOM,而其中大量非生物活性的有色溶解有机物(chromophoric dissolved organic matter,CDOM)的降解则需要光照作用。通过测定有无细菌作用的浒苔浸出液在光照42 h下溶解有机碳(dissolved organic carbon,DOC)的浓度和荧光组分的三维荧光变化,来探究光降解对浒苔源CDOM的影响。研究结果表明,光照不能彻底将CDOM降解转化成CO 2,但是会将大分子质量的荧光物质转化为小分子质量的荧光物质,或使大分子的荧光物质失去荧光特性转化为无荧光的物质。经过细菌参与降解转化后的CDOM光降解效率会降低。At the end of the green tide eruption,Ulva prolifera will undergo apoptosis and release a large amount of dissolved organic matter(DOM)into the ocean.Bacteria can degrade most biologically active DOM,and the degradation of a large number of non-biologically active chromophoric dissolved organic matter(CDOM)requires illumination.In this paper,the concentration of dissolved organic carbon(DOC)and the three-dimensional fluorescence changes of the fluorescent components of the U.prolifera with or without bacteria under 42 hours of light,to explore the effect of photodegradation on the CDOM of moss sources.These research consequences indicate that irradiation cannot completely degrade CDOM into CO 2.But photodegradation will convert large-molecular-weight fluorescent substances into small-molecular-weight fluorescent substances,or cause large-molecule fluorescent substances to lose their fluorescent properties into non-fluorescent substances.

关 键 词：浒苔 有色溶解有机物 光降解 荧光分析 

分 类 号：X55[环境科学与工程—环境工程]