首页|Optical measurements of dissolved organic matter as proxies for CODMn and BOD5 in plateau lakes

Optical measurements of dissolved organic matter as proxies for CODMn and BOD5 in plateau lakes

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The presence of organic matter in lakes profoundly impacts drinking water supplies,yet treatment processes involving coagulants and disinfectants can yield carcinogenic disinfection by-products.Traditional assessments of organic matter,such as chemical oxygen demand(CODMn)and biochemical oxygen demand(BOD5),are often time-consuming.Alternatively,optical measurements of dissolved organic matter(DOM)offer a rapid and reliable means of obtaining organic matter composition data.Here we employed DOM optical measurements in conjunction with parallel factor analysis to scrutinize CODMn and BOD5 variability.Validation was performed using an independent dataset encompassing six lakes on the Yungui Plateau from 2014 to 2016(n=256).Leveraging multiple linear regressions(MLRs)applied to DOM absorbance at 254 nm(a254)and fluorescence components C1-C5,we successfully traced CODMn and BOD5 variations across the entire plateau(68 lakes,n=271,R2＞0.8,P＜0.0001).Notably,DOM optical indices yielded superior estimates(higher R2)of CODMn and BOD5 during the rainy season compared to the dry season and demonstrated increased accuracy(R2＞0.9)in mesotrophic lakes compared to oligotrophic and eutrophic lakes.This study underscores the utility of MLR-based DOM indices for inferring CODMn and BOD5 variability in plateau lakes and highlights the potential of inte-grating in situ and remote sensing platforms for water pollution early warning.

Dissolved organic matterChemical oxygen demandBiochemical oxygen demandWater qualityYungui plateau lakes

Xuan Yang、Yongqiang Zhou、Xiaoying Yang、Yunlin Zhang、Robert G.M.Spencer、Justin D.Brookes、Erik Jeppesen、Hucai Zhang、Qichao Zhou

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Institute for Ecological Research and Pollution Control of Plateau Lakes,School of Ecology and Environmental Sciences,Yunnan University,Kunming,650500,China

Institute of International River and Eco-security,Yunnan University,Kunming,650500,China

Zhejiang College of Security Technology,Wenzhou,325016,China

Taihu Laboratory for Lake Ecosystem Research,State Key Laboratory of Lake Science and Environment,Nanjing Institute of Geography and Limnology,Chinese Academy of Sciences,Nanjing,210008,China

Department of Earth,Ocean and Atmospheric Science,Florida State University,Tallahassee,32306,United States

Water Research Centre,School of Biological Science,The University of Adelaide,Adelaide,5005,Australia

Department of Ecoscience,Aarhus University,Aarhus,8000,Denmark

Sino-Danish Centre for Education and Research,Chinese Academy of Sciences,Beijing,100101,China

Limnology Laboratory,Department of Biological Sciences and Centre for Ecosystem Research and Implementation,Middle East Technical University,Ankara,06800,Turkey

Institute of Marine Sciences,Middle

Yunnan Key Laboratory of Pollution Process and Management of Plateau Lake-Watershed,Yunnan Research Academy of Eco-environmental Sciences,Kunming,650034,China

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Science and Technology Project of Yunnan Province国家自然科学基金国家自然科学基金国家重点研发计划Youth Innovation Promotion Association CASProvincial Natural Science Foundation of JiangsuTüBITAK programTüBITAK program

202103AC10000142322104420711312017YFA06052022021312BK20220162118C250BIDEB2232

2024

10.1016/j.ese.2023.100326

环境科学与生态技术(英文)

环境科学与生态技术(英文)

ISSN：
年,卷(期)：2024.19(3)
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