DOI: 10.1016/j.watres.2018.05.009
Scopus记录号: 2-s2.0-85048015233
论文题名: Transformation of microcystin-LR and olefinic compounds by ferrate(VI): Oxidative cleavage of olefinic double bonds as the primary reaction pathway
作者: Islam A. ; Jeon D. ; Ra J. ; Shin J. ; Kim T.-Y. ; Lee Y.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 141 起始页码: 268
结束页码: 278
语种: 英语
英文关键词: Algal toxin
; Cinnamic acid
; Ferrate(VI)
; Microcystin-LR
; Olefin
; Sorbic acid
Scopus关键词: Liquid chromatography
; Mass spectrometry
; Olefins
; Potable water
; Quality management
; Rate constants
; Sorbic acid
; Surface waters
; Toxic materials
; Water conservation
; Water quality
; Algal toxins
; Cinnamic acids
; Detection and identifications
; Ferrate
; Liquid chromatography - mass spectrometries
; Microcystin-LR
; Second-order rate constants
; Transformation products
; Water treatment
; aldehyde
; alkene derivative
; carbon
; carboxylic acid
; cinnamic acid
; drinking water
; ferrate
; guanidine
; iron derivative
; microcystin LR
; phenyl group
; phosphoprotein phosphatase 2A
; sorbic acid
; unclassified drug
; alkene
; ferrate ion
; iron
; microcystin
; Article
; binding assay
; chemical bond
; chemical reaction kinetics
; drug transformation
; enzyme binding
; liquid chromatography-mass spectrometry
; oxidation
; pH
; priority journal
; reaction analysis
; waste component removal
; water treatment
; chemistry
; kinetics
; liquid chromatography
; oxidation reduction reaction
; oxidative stress
; procedures
; tandem mass spectrometry
; water management
; water pollutant
; algae
; Alkenes
; Chromatography, Liquid
; Iron
; Kinetics
; Microcystins
; Oxidation-Reduction
; Oxidative Stress
; Tandem Mass Spectrometry
; Water Pollutants, Chemical
; Water Purification
英文摘要: The presence of toxic microcystins in algal-impacted surface waters is a concern for drinking water quality management. In this study, the potential of ferrate(VI) to eliminate microcystins during drinking water treatment was assessed by investigating reaction kinetics, reaction sites, transformation products, and toxicity changes for the oxidation of microcystin-LR (MC-LR) as a representative microsystin. The investigations also included several substructural model compounds of MC-LR, such as cinnamic acid and sorbic acid, to elucidate the major transformation products and pathways of MC-LR and olefinic compounds. Second-order rate constants were determined in the pH range 6–10.4 for the reaction of ferrate(VI) with MC-LR and the model compounds. The kinetic data revealed that the olefinic double bonds in the Adda and Mdha residues of MC-LR were the primary ferrate(VI) reaction sites, while the phenyl or guanidine moiety was not the reaction site. This finding was supported by detection and identification of the MC-LR transformation products of double bond cleavage, with high peak abundance in the liquid chromatography-mass spectrometry. Furthermore, the reaction of ferrate(VI) with cinnamic and sorbic acids formed the corresponding aldehydes and organic acids with near complete carbon mass balance, indicating the oxidative cleavage of the double bonds as the primary reaction pathway. A quantitative protein phosphatase 2A (PP2A) binding assay for ferrate(VI)-treated MC-LR solutions showed that the MC-LR transformation products exhibited negligible PP2A binding activity compared to that of the parent MC-LR. Oxidation experiments in a filtered river water matrix spiked with MC-LR demonstrated the efficient elimination of MC-LR during water treatment with ferrate(VI). © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112663
Appears in Collections: 气候减缓与适应
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作者单位: School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju, 61005, South Korea
Recommended Citation:
Islam A.,Jeon D.,Ra J.,et al. Transformation of microcystin-LR and olefinic compounds by ferrate(VI): Oxidative cleavage of olefinic double bonds as the primary reaction pathway[J]. Water Research,2018-01-01,141