DOI: 10.1016/j.watres.2018.06.069
Scopus记录号: 2-s2.0-85052838610
论文题名: Characteristics of intracellular algogenic organic matter and its reactivity with hydroxyl radicals
作者: Lee D. ; Kwon M. ; Ahn Y. ; Jung Y. ; Nam S.-N. ; Choi I.-H. ; Kang J.-W.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 144 起始页码: 13
结束页码: 25
语种: 英语
英文关键词: Advanced oxidation processes
; Algae
; Fluorescence excitation-emission matrix
; Liquid chromatography-organic carbon detection
; Parallel factor analysis
; Radical scavenger
Scopus关键词: Algae
; Amino acids
; Bacteria
; Biogeochemistry
; Biopolymers
; Chemical detection
; Factor analysis
; Fluorescence
; Liquid chromatography
; Molecular weight
; Multivariant analysis
; Organic carbon
; Oxidation
; Advanced Oxidation Processes
; Fluorescence excitation emission matrix
; Organic carbon detection
; Parallel factor analysis
; Radical scavengers
; Rate constants
; algal bloom
; chemical composition
; chemical property
; dissolved organic matter
; factor analysis
; fluorescence
; green alga
; hydroxyl radical
; liquid chromatography
; organic matter
; oxidation
; reaction rate
; scavenging (chemistry)
; algae
; Anabaena sp.
; Chlamydomonas reinhardtii
; Chlorophyta
; Microcystis aeruginosa
; Scenedesmus
英文摘要: The aim of this study was to investigate the reactivity of intracellular algogenic organic matter (IOM) with hydroxyl radicals (·OH), a key reaction species in advanced oxidation processes. IOM was extracted from two green algae, Chlamydomonas reinhardtii and Scenedesmus sp., and two blue-green algae, Anabaena sp. and Microcystis aeruginosa using a freeze–thaw method. The second-order rate constants of the extracted IOM with ·OH were determined as 7.95 × 108 MC −1 s−1 (Chlamydomonas reinhardtii), 6.71 × 108 MC −1 s−1 (Scenedesmus sp.), 4.02 × 108 MC −1 s−1 (Anabaena sp.), and 4.45 × 108 MC −1 s−1 (Microcystis aeruginosa). These rate constants were significantly higher than values reported for dissolved organic matter in various water sources. This implies that IOM formation during algal bloom season could change the ·OH water matrix demand and adversely affect the performance of advanced oxidation processes. To investigate the physical and chemical composition characteristics of IOM and their relationship to the rate constants determined for the reaction between IOM and ·OH, liquid chromatography-organic carbon detection (LC-OCD) and fluorescence excitation-emission matrix & parallel factor analysis (FEEM-PARAFAC) were used. The IOM mainly consisted of low molecular weight (LMW) matter and protein-related compounds, as evidenced LMW neutrals (38–65%), biopolymers (7–19%), and tryptophan-like compounds (74–94%). Based on the composition characteristics of IOM, it was concluded that the molecular weight and the presence of nitrogen-containing compounds are influential parameters for determining the reactivity of IOM with ·OH. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112469
Appears in Collections: 气候减缓与适应
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作者单位: Department of Environmental Engineering (YIEST), Yonsei University, 234 Maeji, Heungup, Wonju, 220-710, South Korea; Department of Civil and Environmental Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul, 06974, South Korea; Water Analysis and Research Center, Korea Water Resources Corporation, 200 Sintanjin-ro, Daedeok-gu, Daejeon, 34350, South Korea
Recommended Citation:
Lee D.,Kwon M.,Ahn Y.,et al. Characteristics of intracellular algogenic organic matter and its reactivity with hydroxyl radicals[J]. Water Research,2018-01-01,144