Characterizing chromophoric dissolved organic matter in Lake Tianmuhu and its catchment basin using excitation-emission matrix fluorescence and parallel factor analysis
Publication in refereed journal


Times Cited
Web of Science125WOS source URL (as at 03/07/2020) Click here for the latest count
Altmetrics Information
.

Other information
AbstractChromophoric dissolved organic matter (CDOM) is an important optically active substance that transports nutrients, heavy metals, and other pollutants from terrestrial to aquatic systems and is used as a measure of water quality. To investigate how the source and composition of CDOM changes in both space and time, we used chemical, spectroscopic, and fluorescence analyses to characterize CDOM in Lake Tianmuhu (a drinking water source) and its catchment in China. Parallel factor analysis (PARAFAC) identified three individual fluorophore moieties that were attributed to humic-like and protein-like materials in 224 water samples collected between December 2008 and September 2009. The upstream rivers contained significantly higher concentrations of CDOM than did the lake water (a(350) of 4.27 +/- 2.51 and 2.32 +/- 0.59 m(-1), respectively), indicating that the rivers carried a substantial load of organic matter to the lake. Of the three main rivers that flow into Lake Tianmuhu, the Pingqiao River brought in the most CDOM from the catchment to the lake. CDOM absorption and the microbial and terrestrial humic-like components, but not the protein-like component, were significantly higher in the wet season than in other seasons, indicating that the frequency of rainfall and runoff could significantly impact the quantity and quality of CDOM collected from the catchment. The different relationships between the maximum fluorescence intensities of the three PARAFAC components, CDOM absorption, and chemical oxygen demand (COD) concentration in riverine and lake water indicated the difference in the composition of CDOM between Lake Tianmuhu and the rivers that feed it. This study demonstrates the utility of combining excitation-emission matrix fluorescence and PARAFAC to study CDOM dynamics in inland waters. (C) 2011 Elsevier Ltd. All rights reserved.
All Author(s) ListZhang YL, Yin Y, Feng LQ, Zhu GW, Shi ZQ, Liu XH, Zhang YZ
Journal nameWater Research
Year2011
Month10
Day15
Volume Number45
Issue Number16
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Pages5110 - 5122
ISSN0043-1354
LanguagesEnglish-United Kingdom
KeywordsChemical oxygen demand; Chromophoric dissolved organic matter; Fluorescence; Lake Tianmuhu; Parallel factor analysis
Web of Science Subject CategoriesEngineering; Engineering, Environmental; ENGINEERING, ENVIRONMENTAL; Environmental Sciences; ENVIRONMENTAL SCIENCES; Environmental Sciences & Ecology; Water Resources; WATER RESOURCES

Last updated on 2020-04-07 at 02:01