Content characteristics of DOM components in overlying water of Beiyun River and its influence on water quality
ZHANG Ya-nan, ZHANG Li, SUN Qing-xuan, PENG Yong-zhen
National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124
Abstract:Based on three-dimensional fluorescence spectroscopy and ultraviolet visible spectroscopy, the composition, source and structural characteristics of dissolved organic matter (DOM) in the overlying water of Tongzhou area of Beiyun River in flood and non-flood season were compared and analyzed, and the relationship between the content of N and P in the overlying water and the composition of DOM was established, The results indicated that the DOM content in the overlying water of Tongzhou area ranged from 9.17mg/L to 27.78mg/L, showing a general trend of non-flood season > flood season, upstream > downstream. The temporal and spatial characteristics of DOM content were significantly different. The molecular weight of DOM in flood season was smaller than that in non-flood season, and the aromatic degree of DOM in flood season was lower than that in non-flood season; the value of DOM A253/A203 in flood season was higher than that in non-flood season. DOM in flood season was affected by both land-based humus and biological sources, while that in non-flood season was mainly affected by microbial activities. The concentrations of protein and humus in flood season were significantly lower than those in non-flood season. Protein components accounted for more in non-flood season, while humus components accounted for more in flood season. The maximum fluorescence intensity of C1, C3 and C4 in DOM could indirectly reflect the potential risk of eutrophication in Beiyun River.
张亚楠, 张莉, 孙清轩, 彭永臻. 北运河上覆水DOM组分含量特征及对水质的影响[J]. 中国环境科学, 2021, 41(8): 3816-3824.
ZHANG Ya-nan, ZHANG Li, SUN Qing-xuan, PENG Yong-zhen. Content characteristics of DOM components in overlying water of Beiyun River and its influence on water quality. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(8): 3816-3824.
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