Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Photooxidation of herbicide amitrole in the presence of fulvic acid. / Pozdnyakov, Ivan P.; Sherin, Peter S.; Salomatova, Victoria A. и др.
в: Environmental Science and Pollution Research, Том 25, № 21, 01.07.2018, стр. 20320-20327.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Photooxidation of herbicide amitrole in the presence of fulvic acid
AU - Pozdnyakov, Ivan P.
AU - Sherin, Peter S.
AU - Salomatova, Victoria A.
AU - Parkhats, Marina V.
AU - Grivin, Vjacheslav P.
AU - Dzhagarov, Boris M.
AU - Bazhin, Nikolai M.
AU - Plyusnin, Victor F.
N1 - Publisher Copyright: © 2017, Springer-Verlag Berlin Heidelberg.
PY - 2018/7/1
Y1 - 2018/7/1
N2 - Fulvic acid (Henan ChangSheng Corporation) photoinduced degradation of non-UVA-absorbing herbicide amitrole (3-amino-1,2,4-triazole, AMT) as a way for its removal from polluted water was investigated in details. It was shown that the main primary species generated by fulvic acid under UVA radiation, triplet state and hydrated electron, are not directly involved in the herbicide degradation. AMT decays in reactions with secondary intermediates, reactive oxygen species, formed in reactions of the primary ones with dissolved oxygen. Singlet oxygen is responsible for 80% of herbicide oxidation, and •OH and O2−• radicals—for the remaining 20% of AMT. It was found that quantum yield of AMT photodegradation (ϕ365nm) decreases linearly from 2.2 × 10−3 to 1.2 × 10−3 with the increase of fulvic acid concentration from 1.1 to 30 mg L−1. On the contrary, the increase of AMT concentration from 0.8 to 25 mg L−1 leads to practically linear growth of ϕ365nm value from 1.8 × 10−4 to 4 × 10−3. Thus, the fulvic acid exhibits a good potential as UVA photooxidizer of organic pollutants sensitive to the singlet oxygen (ϕ532nm(1O2) = 0.025 at pH 6.5).
AB - Fulvic acid (Henan ChangSheng Corporation) photoinduced degradation of non-UVA-absorbing herbicide amitrole (3-amino-1,2,4-triazole, AMT) as a way for its removal from polluted water was investigated in details. It was shown that the main primary species generated by fulvic acid under UVA radiation, triplet state and hydrated electron, are not directly involved in the herbicide degradation. AMT decays in reactions with secondary intermediates, reactive oxygen species, formed in reactions of the primary ones with dissolved oxygen. Singlet oxygen is responsible for 80% of herbicide oxidation, and •OH and O2−• radicals—for the remaining 20% of AMT. It was found that quantum yield of AMT photodegradation (ϕ365nm) decreases linearly from 2.2 × 10−3 to 1.2 × 10−3 with the increase of fulvic acid concentration from 1.1 to 30 mg L−1. On the contrary, the increase of AMT concentration from 0.8 to 25 mg L−1 leads to practically linear growth of ϕ365nm value from 1.8 × 10−4 to 4 × 10−3. Thus, the fulvic acid exhibits a good potential as UVA photooxidizer of organic pollutants sensitive to the singlet oxygen (ϕ532nm(1O2) = 0.025 at pH 6.5).
KW - Amitrole
KW - Fulvic acids
KW - Herbicides
KW - Photooxidation
KW - Reactive oxygen species
KW - TRIPLET-STATES
KW - QUANTUM YIELDS
KW - HYDRATED ELECTRONS
KW - AQUEOUS-SOLUTION
KW - RATE CONSTANTS
KW - PHOTODEGRADATION
KW - SINGLET OXYGEN
KW - DISSOLVED ORGANIC-MATTER
KW - RADICALS
KW - PHOTOLYSIS
UR - http://www.scopus.com/inward/record.url?scp=85013626314&partnerID=8YFLogxK
U2 - 10.1007/s11356-017-8580-x
DO - 10.1007/s11356-017-8580-x
M3 - Article
C2 - 28233210
AN - SCOPUS:85013626314
VL - 25
SP - 20320
EP - 20327
JO - Environmental Science and Pollution Research
JF - Environmental Science and Pollution Research
SN - 0944-1344
IS - 21
ER -
ID: 9068222