天津科技大学学报2017，Vol.32Issue(2)：42-48,7.DOI:10.13364/j.issn.1672-6510.20150240
天津大沽排污河及大沽沙航道水体中CDOM光谱分析
Spectroscopic Analysis of Chromophoric Dissolved Organic Matter in the Water of Dagu Drainage River and Dagusha Channel in Tianjin
摘要
Abstract
The spatial distribution,composition,and sources of Chromophoric Dissolved Organic Matter(CDOM)in the water of Dagu Drainage River and Dagusha Channel were analyzed by using UV-Vis absorption spectra and excitation-emission matrix spectra.The results indicated that the CDOM absorption coefficient,a355,ranged from 1.73,m-1to 23.62,m-1. The abundance of CDOM was highest in the downstream of Dagu Drainage River,followed by the upstream of the river,and then the Dagusha Channel,which showed that the organic pollution loads were the largest in the downstream of Dagu Drain-age River.Protein-like peaks(T1,T2)and humic-like peaks(A,C,M) were founded in the studied area,and the protein-like components accounted a larger proportion,while a closer relationship existed between humic-like components and the ab-sorption of CDOM.The results of Emmax of peak A and C and the UV-Vis spectrum parameter,E253/203,suggests that CDOM in the water of the downstream of Dagu Drainage River exhibited a higher aromaticity.Besides,the aromatic rings contained a great deal of hydroxyl,carbonyl carboxyl,and ester groups.The humification index HIXb suggested that the sources of CDOM in the downstream of Dagu Drainage River were mainly terrestrial inputs(industrial sewage),while in the upstream of Dagu Drainage River and Dagusha Channel,CDOM was mainly caused by microbial activities.关键词
排污河/有色溶解有机物/紫外-可见吸收光谱/三维荧光光谱Key words
drainage river/CDOM/UV-Vis absorption spectra/excitation-emission matrix spectra(EEMS)分类
资源环境引用本文复制引用
王风娟,董景岗..天津大沽排污河及大沽沙航道水体中CDOM光谱分析[J].天津科技大学学报,2017,32(2):42-48,7.基金项目
天津市科技支撑计划重点资助项目(15ZCZDSF00620) （15ZCZDSF00620）
