| DOI: | 10.1016/j.watres.2018.05.056
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| Scopus记录号: | 2-s2.0-85048724486
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| 论文题名: | Oxidation of cyanobacterial neurotoxin beta-N-methylamino-L-alanine (BMAA) with chlorine, permanganate, ozone, hydrogen peroxide and hydroxyl radical |
| 作者: | Chen Y.-T.; Chen W.-R.; Lin T.-F.
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| 刊名: | Water Research
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| ISSN: | 431354
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| 出版年: | 2018
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| 卷: | 142 | | 起始页码: | 187
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| 结束页码: | 195
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| 语种: | 英语
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| 英文关键词: | Beta-N-methylamino-L-alanine (BMAA)
; Cyanotoxin
; Natural water
; Oxidation
; pH effect
; Reaction kinetics
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| Scopus关键词: | Amino acids
; Association reactions
; Deionized water
; Free radical reactions
; Free radicals
; Hydrogen peroxide
; Neurodegenerative diseases
; Oxidants
; Oxidation
; Ozone
; Ozone water treatment
; Ozonization
; Peroxides
; pH effects
; Potable water
; Potash
; Rate constants
; Reaction kinetics
; Alzheimer's disease
; Amyotrophic lateral sclerosis
; Cyanotoxins
; Hydroxide concentration
; L-alanine
; Natural waters
; Potassium permanganate
; Second-order reaction
; Chemicals removal (water treatment)
; beta n methylamino lalanine
; chlorine
; deionized water
; drinking water
; hydrogen peroxide
; hydroxyl radical
; neurotoxin
; ozone
; permanganate potassium
; unclassified drug
; biodegradation
; chemical compound
; concentration (composition)
; hydrogen peroxide
; hydroxyl radical
; oxidant
; oxidation
; ozonation
; ozone
; pH
; reaction kinetics
; reaction rate
; toxin
; water treatment plant
; Article
; chemical reaction kinetics
; controlled study
; cyanobacterium
; degradation
; drinking water treatment plant
; nonhuman
; oxidation
; ozonation
; pH
; priority journal
; rate constant
; water treatment
; Cyanobacteria
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| 英文摘要: | Beta-N-methylamino-L-alanine (BMAA), a new cyanobacterial neurotoxin produced by more than 20 genera of cyanobacteria, has been associated with amyotrophic lateral sclerosis/parkinsonism–dementia complex (ALS/PDC) or Alzheimer's disease. Although BMAA has been shown to be removed in drinking water treatment plants (DWTPs), studies regarding the reactions between BMAA and the commonly used oxidants in DWTPs are limited to chlorine under specific conditions. In this study, the reaction kinetics between BMAA and five oxidants commonly used in DWTPs, including chlorine, potassium permanganate, ozone, hydrogen peroxide and hydroxyl radical were investigated. The oxidation of BMAA by chlorine, ozone or OH radical followed the second order reaction rate law, and the reaction rate was in the order of OH radicals > ozone >> chlorine. The rate constants increased by 20 times from 2 × 103 M−1s−1 at pH 5.8 to 4.93 × 104 M−1s−1 at pH 7, and kept in a relatively stable level at pH 7–9.5; rate constants of OH radicals were 1.11 × 108 M−1s−1 at pH 6.5 and 5.51 × 109- 1.35 × 1010 M−1s−1 at pH > 6.5. For both permanganate and H2O2 only, the removal of BMAA was negligible. The pH dependency of chlorine and the OH radical may be attributed to the neutral form of BMAA with free lone pair electrons readily to be attacked by oxidants. However, for ozonation of BMAA, the rate constants were 1.88 × 106–3.72 × 1010 M−1s−1, with a linear dependency on pH, implying that the hydroxide concentration governs the reaction. In addition, the rate of BMAA degradation was found to be slower in natural water if compared with that in deionized water. © 2018 Elsevier Ltd |
| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/112613
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Department of Environmental Engineering and Global Water Quality Research Center, National Cheng Kung University, Tainan City, 70101, Taiwan
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| Recommended Citation: | |
Chen Y.-T.,Chen W.-R.,Lin T.-F.. Oxidation of cyanobacterial neurotoxin beta-N-methylamino-L-alanine (BMAA) with chlorine, permanganate, ozone, hydrogen peroxide and hydroxyl radical[J]. Water Research,2018-01-01,142
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