Abundance and Fluorescent Components of Dissolved Organic Matter Affected by Land Use in a Drinking Water Source

被引：1

作者：

Gao J. ^{[1
]}

Pu X. ^{[1
]}

Zhang Y.-H. ^{[1
]}

Cheng H.-G. ^{[2
]}

Zhang R.-N. ^{[1
]}

Liu X.-L. ^{[1
]}

Dong X. ^{[1
]}

Xu X.-Y. ^{[1
]}

机构：

[1] College of Resource Environment and Tourism, Capital Normal University, Beijing

[2] College of Water Sciences, Beijing Normal University, Beijing

来源：

Huanjing Kexue/Environmental Science | 2022年 / 43卷 / 04期

关键词：

Chaobai River; Dissolved organic matter (DOM); Excitation emission matrix spectroscopy (EEMs); Fluorescence index; Parallel factor analysis (PARAFAC);

D O I：

10.13227/j.hjkx.202105013

中图分类号：

学科分类号：

摘要：

Regional concentrations, fluorescent components, and sources of dissolved organic matter (DOM) in a drinking water source in Chaobai River across seasons were investigated here using fluorescence excitation-emission matrices, parallel factor analysis, and fluorescence indexes. Five fluorescent-DOM components were identified, including two microbial humic-like components and one autochthonous tyrosine-like, one reduced quinone-like, and one terrestrial humic-like component. DOM was mainly derived from microorganisms. The farmland-dominated region showed the highest DOM concentration and significantly lower maximum fluorescence intensities (Fmax) of almost all fluorescent components than those in the forest-dominated region. The region dominated by urban lands exhibited obviously lower DOM concentrations than those in the farmland-dominated region and lower Fmax values of fluorescent components than those in the forest-dominated region. No interaction was found between land use and season when considering their effects on DOM. Season had a significant influence on the humification degree of DOM. This study shows that agricultural land use had a greater impact on DOM than that of forests and urban areas, and the increased riverine DOM resulting from farmland was mainly non-fluorescent parts. © 2022, Science Press. All right reserved.

引用

页码：1950 / 1957

页数：7

共 38 条

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