Oxidation of cyanobacterial neurotoxin beta-N-methylamino-L-alanine (BMAA) with chlorine, permanganate, ozone, hydrogen peroxide and hydroxyl radical

Chen, Yi Ting; Chen, Wan Ru; Lin, Tsair Fuh

doi:10.1016/j.watres.2018.05.056

Cited by 30 publications

(20 citation statements)

References 42 publications

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“…chlorine under acidic conditions (Table 1) and is often used as a precursor for OH as well as to improve the effectiveness of AOPs, it is relatively ineffective for the degradation of cyanotoxins if employed solely. Removal of MC-LR, CYN, ANTX and BMAA by H 2 O 2 was reported to be < 10 % [37][38][39][40][41]. Even at 30 ℃ for 3.5 h, only about 3 % MC-LR was removed by H 2 O 2 [36].…”

Section: Hydrogen Peroxidementioning

confidence: 98%

“…Numerous studies showed the high effectiveness of O 3 for the degradation of MCs, NOD, CYN, ANTX and BMAA [14,19,37,[44][45][46]). On the other hand, ozonation is not recommended for STXs degradation, as the toxicity to mice of a STX extract treated with O 3 and O 3 /H 2 O 2 was reduced by < 10 % only [47].…”

Section: Ozonation and O 3 -Based Aopsmentioning

confidence: 99%

“…(1)) played a substantial role [37]. Moreover, the selectivity of O 3 toward speci c electron-rich moieties was shown to be pH-dependent, as the C=C double bonds in CYN and ATNX are primarily attacked at pH < 7-8, whereas oxidation of the amine groups dominates at higher pH [14,19,46].…”

Section: Ozonation and O 3 -Based Aopsmentioning

confidence: 99%

“…Different studies reported that MCs were degraded at higher rates compared to CYN, ANTX and BMAA because of their higher reactivity with OH. This is caused by MCs' size and higher number of functional moieties that are partly more susceptible to radical attack [37,41,65]. The importance of the structure for the reactivity with OH is further a rmed when looking at different MCs.…”

Section: Photolysis In Combination With Oxidantsmentioning

confidence: 99%

“…See formulas 10-17 in the supplementary les.UV in combination with oxidants has been studied for the removal of MCs, CYN, ANTX and BMAA. For all for toxins, UV-based treatment was substantially more effective when H 2 O 2 was added[37,39,40,54,55,60]. Increasing H 2 O 2 concentration improved cyanotoxin degradation only up to a certain oxidant concentration.…”

mentioning

confidence: 97%

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Advanced oxidation processes for the removal of cyanobacterial toxins from drinking water

Schneider

Bláha

2020

Preprint

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Drinking water production faces many different challenges with one of them being naturally produced cyanobacterial toxins. Since pollutants become more abundant and persistent today, conventional water treatment is often no longer sufficient to provide adequate removal. Amongst other emerging technologies, advanced oxidation processes (AOPs) have a great potential to appropriately tackle this issue. This review addresses the economic and health risks posed by cyanotoxins and discusses their removal from drinking water by AOPs. The current state of knowledge on AOPs and their application for cyanotoxin degradation is synthesized to provide an overview on available techniques and effects of water quality, toxin- and technique-specific parameters on their degradation efficacy. The different AOPs are compared based on their efficiency and applicability, considering economic, practical and environmental aspects and their potential to generate toxic disinfection byproducts. For future research, more relevant studies to include the degradation of less explored cyanotoxins, toxin mixtures in actual surface water, assessment of residual toxicity and scale-up are recommended. Since actual surface water most likely contains more than just cyanotoxins, a multi-barrier approach consisting of a series of different physical, biological and chemical – especially oxidative – treatment steps is inevitable to ensure safe and high quality drinking water.

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Section: Hydrogen Peroxidementioning

confidence: 98%

Section: Ozonation and O 3 -Based Aopsmentioning

confidence: 99%

Section: Ozonation and O 3 -Based Aopsmentioning

confidence: 99%

Section: Photolysis In Combination With Oxidantsmentioning

confidence: 99%

mentioning

confidence: 97%

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Advanced oxidation processes for the removal of cyanobacterial toxins from drinking water

Schneider

Bláha

2020

Preprint

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Determination of oxidation rate constant for nodularin‐r, saxitoxin, dc‐saxitoxin, and neo‐saxitoxin with conventional water treatment plant oxidants and advanced oxidation processes

Maalouf,

Adams,

Hoppe‐Jones

2024

AWWA Water Science

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The effectiveness of chemical oxidation depends on the type of cyanotoxins present in the water and varies with the water quality parameters. This study investigated four cyanotoxins to understand their reactions with conventional drinking water treatment plant oxidants and with advanced oxidation. Kinetic rate constants between saxitoxin, and two variants (dcSTX and neoSTX), and nodularin‐R with chlorine, monochloramine, permanganate, ozone, and hydroxyl radicals (UV‐H2O2) were developed under different pH and temperature conditions. Nodularin‐R kinetic rate constants were comparable to peer‐reviewed microcystin‐LR rate constants with reaction rates in the order of OH radicals > ozone >> chlorine > permanganate >> monochloramine. The speciation of saxitoxins with pH had a dominant effect on their reaction rates with the listed oxidants. Chlorine was the only oxidant effective for saxitoxins removal. The reaction rates of saxitoxins with OH radicals varied slightly with pH but were around two orders of magnitude less than microcystin‐LR's.

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BMAA Neurotoxicity

Metcalf¹,

Dunlop²,

Cox³

et al. 2021

Handbook of Neurotoxicity

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Oxidation of cyanobacterial neurotoxin beta-N-methylamino-L-alanine (BMAA) with chlorine, permanganate, ozone, hydrogen peroxide and hydroxyl radical

Cited by 30 publications

References 42 publications

Advanced oxidation processes for the removal of cyanobacterial toxins from drinking water

Advanced oxidation processes for the removal of cyanobacterial toxins from drinking water

Determination of oxidation rate constant for nodularin‐r, saxitoxin, dc‐saxitoxin, and neo‐saxitoxin with conventional water treatment plant oxidants and advanced oxidation processes

BMAA Neurotoxicity

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