Optical measurements of dissolved organic matter as proxies for COD_(Mn)and BOD_(5)in plateau lakes  

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

机构地区：[1]Institute for Ecological Research and Pollution Control of Plateau Lakes,School of Ecology and Environmental Sciences,Yunnan University,Kunming,650500,China [2]Institute of International River and Eco-security,Yunnan University,Kunming,650500,China [3]Zhejiang College of Security Technology,Wenzhou,325016,China [4]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 [5]Department of Earth,Ocean and Atmospheric Science,Florida State University,Tallahassee,32306,United States [6]Water Research Centre,School of Biological Science,The University of Adelaide,Adelaide,5005,Australia [7]Department of Ecoscience,Aarhus University,Aarhus,8000,Denmark [8]Sino-Danish Centre for Education and Research,Chinese Academy of Sciences,Beijing,100101,China [9]Limnology Laboratory,Department of Biological Sciences and Centre for Ecosystem Research and Implementation,Middle East Technical University,Ankara,06800,Turkey [10]Institute of Marine Sciences,Middle East Technical University,Erdemli,Mersin,33731,Turkey [11]Yunnan Key Laboratory of Pollution Process and Management of Plateau Lake-Watershed,Yunnan Research Academy of Eco-environmental Sciences,Kunming,650034,China

出　　处：《Environmental Science and Ecotechnology》2024年第3期132-138,共7页环境科学与生态技术（英文）

基　　金：the support of the Science and Technology Project of Yunnan Province(No.202103AC100001);the National Natural Science Foundation of China(Nos.42322104 and 42071131);the National Key Research and Development Programof China(No.2017YFA0605202);the Youth Innovation Promotion Association CAS(No.2021312);the Provincial Natural Science Foundation of Jiangsu(No.BK20220162);the TÜBITAK program BIDEB2232(project 118C250).

摘　　要：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(COD_(Mn))and biochemical oxygen demand(BOD_(5)),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 COD_(Mn)and BOD_(5)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 COD_(Mn)and BOD_(5)variations across the entire plateau(68 lakes,n=271,R^(2)>0.8,P<0.0001).Notably,DOM optical indices yielded superior estimates(higher R^(2))of COD_(Mn)and BOD_(5)during the rainy season compared to the dry season and demonstrated increased accuracy(R^(2)>0.9)in mesotrophic lakes compared to oligotrophic and eutrophic lakes.This study underscores the utility of MLR-based DOM indices for inferring COD_(Mn)and BOD_(5)variability in plateau lakes and highlights the potential of integrating in situ and remote sensing platforms for water pollution early warning.

关 键 词：Dissolved organic matter Chemical oxygen demand Biochemical oxygen demand Water quality Yungui plateau lakes 

分 类 号：X524[环境科学与工程—环境工程]