Spectral Characteristics in the Degradation Process of Colored Dissolved Organic Matter from Large Filamentous Algae Sources in Saltwater Lake

被引:2
|
作者
Zou, Limin [1 ]
Li, Jianhua [1 ]
Jiang, Degang [1 ]
Wang, Yulai [1 ]
机构
[1] Tongji Univ, Key Lab Yangtze River Water Environm, Minist Educ, Coll Environm Sci & Engn, Shanghai 200092, Peoples R China
来源
PROGRESS IN ENVIRONMENTAL SCIENCE AND ENGINEERING (ICEESD2011), PTS 1-5 | 2012年 / 356-360卷
关键词
Colored dissolved organic matter; bristles algae; photodegradation; three-dimensional fluorescence; parallel factor method;
D O I
10.4028/www.scientific.net/AMR.356-360.2536
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The indoor experimental study was on a large common species of filamentous green algae in the North Lake beach of Chongming Island - bristles algae liquid produced by algae growth during the photodegradation of colored dissolved organic matter (CDOM) spectral characteristics change. Absorption coefficient a (355) in the degradation experiment was reduced 27.44%, however, in the control experiment, a (355) was only 1.61% lower. In the photodegradation process of degradation experiments and control experiments, the values of M and S were increased to the different extent and the increased value of the former was higher than the latter. By using three-dimensional fluorescence spectroscopy (EEMS), the detected peak value of protein-and humic fluorescence in control experiments was little changed, while significantly increased in the degradation experiments. By the analysis of parallel factor model (PARAFAC) combined with three-dimensional fluorescence excitation - emission matrix data (EEMS), the three-component CDOM: C 1, C2, C3, respectively were relative to humic fluorescence peaks A, C, and protein-like fluorescence B. In the degradation experiments, small changes were in the components of C 1, however the components of C2, C3 compared with those in the control group were increased by nearly 2 times. All results showed that the photodegradation process of bristles algae liquid can cause changes of the CDOM in the structure and content, easier to produce small molecules and weak aromatic CDOM.
引用
收藏
页码:2536 / 2541
页数:6
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