FLUORESCENT COMPONENTS, MOLECULAR PROPERTIES AND SOURCES OF DOM IN SECONDARY EFFLUENT OF MUNICIPAL SEWAGE TREATMENT PLANTS

YANG Yi; ZHAO Rui; ZHENG Zhenze; SHU Qilin; LIU Wei

doi:10.13205/j.hjgc.202412009

Volume 42 Issue 12

Dec. 2024

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YANG Yi, ZHAO Rui, ZHENG Zhenze, SHU Qilin, LIU Wei. FLUORESCENT COMPONENTS, MOLECULAR PROPERTIES AND SOURCES OF DOM IN SECONDARY EFFLUENT OF MUNICIPAL SEWAGE TREATMENT PLANTS[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(12): 66-72. doi: 10.13205/j.hjgc.202412009

Citation:

YANG Yi, ZHAO Rui, ZHENG Zhenze, SHU Qilin, LIU Wei. FLUORESCENT COMPONENTS, MOLECULAR PROPERTIES AND SOURCES OF DOM IN SECONDARY EFFLUENT OF MUNICIPAL SEWAGE TREATMENT PLANTS[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(12): 66-72. doi: 10.13205/j.hjgc.202412009

Citation:

YANG Yi, ZHAO Rui, ZHENG Zhenze, SHU Qilin, LIU Wei. FLUORESCENT COMPONENTS, MOLECULAR PROPERTIES AND SOURCES OF DOM IN SECONDARY EFFLUENT OF MUNICIPAL SEWAGE TREATMENT PLANTS[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(12): 66-72. doi: 10.13205/j.hjgc.202412009

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FLUORESCENT COMPONENTS, MOLECULAR PROPERTIES AND SOURCES OF DOM IN SECONDARY EFFLUENT OF MUNICIPAL SEWAGE TREATMENT PLANTS

doi: 10.13205/j.hjgc.202412009

YANG Yi^{1,2,3
,},
ZHAO Rui¹,
ZHENG Zhenze⁴,
SHU Qilin^1
,,
LIU Wei¹

1. School of Environmental & Municipal Engineering, Xi'an University of Architecture & Techology, Xi'an 710055, China;
2. Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China;
3. Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, China;
4. Southwest Municipal Engineering Design & Research Institute of China, Chengdu 610000, China

Received Date: 2023-10-25
Available Online: 2025-01-18

Abstract

Abstract

The fluorescence components, molecular characteristics and sources of DOM in secondary effluent of municipal sewage treatment plants were revealed by three-dimensional fluorescence spectrophotometry and ultraviolet spectrophotometry with parallel factor analysis and correlation analysis, providing a data basis for the study of DOM molecular composition and source characteristics in aquatic environment. The results showed that the DOM in secondary effluent mainly contained one type of proteinoid (tryptophan-like) and more than two kinds of humus-like. There was a significant negative correlation between the content of proteinoid (corresponding to peak T₁ and T₂) and humus-like (corresponding to peak A and C) in DOM (P＜0.01 or P＜0.05). TCOD, SCOD and DOC were negatively correlated with the values of SUVA₂₅₄ and SUVA₂₆₀ (r=-0.65 to -0.96, P＜0.01 or P＜0.05), respectively. The fluorescence index (FI), biological index (BIX), humification index (HIX) and r(T/C) values of DOM were 1.96 to 2.19, 1.02 to 1.18, 1.82 to 3.27 and 2.25 to 2.95, respectively. The FI and BIX values changed relatively less, while the HIX value changed relatively greatly. There were differences in the composition and molecular properties of DOM in secondary effluent from different municipal wastewater treatment plants. The DOM came from endogenous biological origin, and the organic matter was newly produced with a weak humification degree. The DOM was humus-like-dominated, mainly derived from feces and biodegradation products, etc.
- secondary effluent,
- dissolved organic matter,
- parallel factor analysis,
- component,
- source

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References(29)

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