Persulfate assisted photodegradation and mineralization of herbicide MCPA: The influence of photoproducts' photolysis on the generation of sulfate radicals

Standard

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

BibTeX

@article{383fc88fcf5e455ab4af85bf0dc427f3,

title = "Persulfate assisted photodegradation and mineralization of herbicide MCPA: The influence of photoproducts' photolysis on the generation of sulfate radicals",

abstract = "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.",

keywords = "AOPs, MCPA, Mineralization, Phenoxyacetic acids, Photodegradation, Photolysis, Sulfate radical",

author = "Ivan Tsay and Snytnikova, {Olga A.} and Yanshole, {Vadim V.} and Polyakova, {Evgeniya V.} and Huang, {Li Zhi} and Pozdnyakov, {Ivan P.}",

year = "2025",

month = jun,

doi = "10.1016/j.jece.2025.116990",

language = "English",

volume = "13",

journal = "Journal of Environmental Chemical Engineering",

issn = "2213-3437",

publisher = "Elsevier Science Publishing Company, Inc.",

number = "3",

}

RIS

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