Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Persulfate assisted photodegradation and mineralization of herbicide MCPA: The influence of photoproducts' photolysis on the generation of sulfate radicals. / Tsay, Ivan; Snytnikova, Olga A.; Yanshole, Vadim V. и др.
в: Journal of Environmental Chemical Engineering, Том 13, № 3, 116990, 06.2025.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Persulfate assisted photodegradation and mineralization of herbicide MCPA: The influence of photoproducts' photolysis on the generation of sulfate radicals
AU - Tsay, Ivan
AU - Snytnikova, Olga A.
AU - Yanshole, Vadim V.
AU - Polyakova, Evgeniya V.
AU - Huang, Li Zhi
AU - Pozdnyakov, Ivan P.
PY - 2025/6
Y1 - 2025/6
N2 - Photodegradation and mineralization of the herbicide MCPA in aqueous solution were studied in the absence and presence of sodium persulfate. Mineralization was not observed after 120 minutes of direct photolysis at 282 nm, but was achieved after 90 minutes of irradiation in the presence of persulfate. This is the first case of complete mineralization of MCPA in a UV/PS system without any catalytic additives. The main products and detailed mechanisms of MCPA photodegradation were proposed in both cases based on the LC/MS results. It was found that the mineralization of MCPA in the presence of persulfate was predominantly due to its activation by the secondary photolysis of herbicide photodegradation products rather than by direct photolysis of persulfate itself. This new mechanism may explain the observed activation of persulfate by UV light and provide new insights into the photooxidation of persistent pollutants in sulfate radical-based AOPs. The formation of chlorates has been observed in the presence of persulfate and this may be a global problem for the oxidation of chlorine-containing compounds in sulfate radical-based AOPs.
AB - Photodegradation and mineralization of the herbicide MCPA in aqueous solution were studied in the absence and presence of sodium persulfate. Mineralization was not observed after 120 minutes of direct photolysis at 282 nm, but was achieved after 90 minutes of irradiation in the presence of persulfate. This is the first case of complete mineralization of MCPA in a UV/PS system without any catalytic additives. The main products and detailed mechanisms of MCPA photodegradation were proposed in both cases based on the LC/MS results. It was found that the mineralization of MCPA in the presence of persulfate was predominantly due to its activation by the secondary photolysis of herbicide photodegradation products rather than by direct photolysis of persulfate itself. This new mechanism may explain the observed activation of persulfate by UV light and provide new insights into the photooxidation of persistent pollutants in sulfate radical-based AOPs. The formation of chlorates has been observed in the presence of persulfate and this may be a global problem for the oxidation of chlorine-containing compounds in sulfate radical-based AOPs.
KW - AOPs
KW - MCPA
KW - Mineralization
KW - Phenoxyacetic acids
KW - Photodegradation
KW - Photolysis
KW - Sulfate radical
UR - https://www.mendeley.com/catalogue/0b0cb85d-7da6-3f36-9539-712229bfb057/
UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-105006616927&origin=inward&txGid=5b756184dfd3032954383ee775df4067
U2 - 10.1016/j.jece.2025.116990
DO - 10.1016/j.jece.2025.116990
M3 - Article
VL - 13
JO - Journal of Environmental Chemical Engineering
JF - Journal of Environmental Chemical Engineering
SN - 2213-3437
IS - 3
M1 - 116990
ER -
ID: 67459469