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Journal of Environmental Accounting and Management 8(2) (2020) 167--178 | DOI:10.5890/JEAM.2020.06.005

Li Zhang$^{1}$,$^{2}$, Shengrui Wang$^{2}$,$^{3}$, Qingxuan Sun$^{1}$, Han Liu$^{1}$, Wenzhang Li$^{2}$

$^{1}$ 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, China

$^{2}$ State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China

$^{3}$ College of Water Sciences, Beijing Normal University, Beijing 100875, China

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Abstract

The distribution of Erhai Lake sediment pore water DON followed the pattern of middle (1.449 mg/L) > south (0.828 mg/L) > north (0.266 mg/L), with the highest concentrations being found in the least polluted areas. The sediment pore water DON mainly contained hydrophilic substances and substances derived from microbial sources. Most of these were integrated into humic acid-like substances (∼78%), which benefited for reducing sediment DON releasing risk. There were more chains in Erhai Lake sediment pore water DON, with a small number of aromatic substituents. The characteristics of DON components were suggested to be related to human activities.

Acknowledgments

This research was supported by the Beijing Major Science and Technology Projects (Z181100005318001), Beijing Natural Science Foundation (8192004), the National Natural Science Foundation of China (41503113).

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