Oxidation of Microcystin-LR by Ferrate(VI): Kinetics, Degradation Pathways, and Toxicity Assessments

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F14%3A33152049" target="_blank" >RIV/61989592:15310/14:33152049 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985939:_____/14:00437711

Výsledek na webu

<a href="http://pubs.acs.org/doi/pdf/10.1021/es5030355" target="_blank" >http://pubs.acs.org/doi/pdf/10.1021/es5030355</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/es5030355" target="_blank" >10.1021/es5030355</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Oxidation of Microcystin-LR by Ferrate(VI): Kinetics, Degradation Pathways, and Toxicity Assessments

Popis výsledku v původním jazyce

The presence of the potent cyanotoxin, microcystin-LR (MC-LR), in drinking water sources poses a serious risk to public health. The kinetics of the reactivity of ferrate(VI) (FeVIO42?, Fe(VI)) with MC-LR and model compounds (sorbic acid, sorbic alcohol,and glycine anhydride) are reported over a range of solution pH. The degradation of MC-LR followed second-order kinetics with the bimolecular rate constant (kMCLR+Fe(VI)) decreasing from 1.3 +- 0.1 x 102 M?1 s?1 at pH 7.5 to 8.1 +- 0.08 M?1 s?1 at pH 10.0. The specific rate constants for the individual ferrate species were determined and compared with a number of common chemical oxidants employed for water treatment. Detailed product studies using liquid chromatography?mass spectrometry/mass spectrometry (LC?MS/MS) indicated the oxidized products (OPs) were primarily the result of hydroxylation of the aromatic ring, double bond of the methyldehydroalanine (Mdha) amino acid residue, and diene functionality. Products studies also indicate

Název v anglickém jazyce

Oxidation of Microcystin-LR by Ferrate(VI): Kinetics, Degradation Pathways, and Toxicity Assessments

Popis výsledku anglicky

The presence of the potent cyanotoxin, microcystin-LR (MC-LR), in drinking water sources poses a serious risk to public health. The kinetics of the reactivity of ferrate(VI) (FeVIO42?, Fe(VI)) with MC-LR and model compounds (sorbic acid, sorbic alcohol,and glycine anhydride) are reported over a range of solution pH. The degradation of MC-LR followed second-order kinetics with the bimolecular rate constant (kMCLR+Fe(VI)) decreasing from 1.3 +- 0.1 x 102 M?1 s?1 at pH 7.5 to 8.1 +- 0.08 M?1 s?1 at pH 10.0. The specific rate constants for the individual ferrate species were determined and compared with a number of common chemical oxidants employed for water treatment. Detailed product studies using liquid chromatography?mass spectrometry/mass spectrometry (LC?MS/MS) indicated the oxidized products (OPs) were primarily the result of hydroxylation of the aromatic ring, double bond of the methyldehydroalanine (Mdha) amino acid residue, and diene functionality. Products studies also indicate

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CC - Organická chemie

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2014

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Environmental Science & Technology

ISSN

0013-936X

e-ISSN

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Svazek periodika

48

Číslo periodika v rámci svazku

20

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

12164-12172

Kód UT WoS článku

000343640900051

EID výsledku v databázi Scopus

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