Ag+/S2O8 2– system for the degradation of aqueous flutriafol

• Autorzy: Yang H. , Zhou W. , Yang L. , Deng J. , Hu Q. , Wei H. , Au C. , Yi B.

Identyfikatory

DOI

10.5277/epe180204

• Języki publikacji: EN

Abstrakty

EN

The degradation of flutriafol in aqueous persulfate (S₂O₈^2–) system in the presence of selected transition metal ions was investigated. In the presence of Ag⁺ or Fe²⁺, flutriafol degradation occurs, whereas in the presence of Mn²⁺, Co²⁺, Ni²⁺, Cu²⁺, Zn²⁺ and Bi³⁺ ions, the degradation is less than 15%. The Ag+/ S₂O₈^2– aqueous system being the most effective was adopted for experimental and theoretical investigations. It was confirmed that pH of 3.0 is the most suitable, and that both · SO₄^–and ^·OH– radicals are the main active species to afford flutriafol degradation, with the former contributes more than the latter. To elucidate degradation mechanism, molecular orbital calculations were performed and reaction intermediates identified by GC/MS and HPLC/MS/MS analyses. Three degradation pathways are proposed that involve the cleavage of C–N and C–C bonds as a result of ^·SO₄^– attack, as well as the formation of hydroxylated products due to ^· OH radicals.

Słowa kluczowe

EN

chemical analysis; degradation; free radicals; metal ions; molecular orbital; transition metals

PL

analiza chemiczna; degradacja; wolne rodniki; jony metali; orbital molekularny; metale przejściowe

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Environment Protection Engineering
• Rocznik: 2018
• Tom: Vol. 44, nr 2
• Strony: 57--72
• Opis fizyczny: Bibliogr. 27 poz., tab., rys.

Twórcy

autor

Yang H.

• College of Chemistry and Chemical Engineering, Hunan Institute of Engineering, Xiangtan, 411104, China

autor

Zhou W.

• College of Chemistry and Chemical Engineering, Hunan Institute of Engineering, Xiangtan, 411104, China

autor

Yang L.

• Shenzhen Academy of Environmental Sciences, Shenzhen, 518001, China

autor

Deng J.

• College of Chemistry and Chemical Engineering, Hunan Institute of Engineering, Xiangtan, 411104, China

autor

Hu Q.

• College of Chemistry and Chemical Engineering, Hunan Institute of Engineering, Xiangtan, 411104, China

autor

Wei H.

• College of Chemistry and Chemical Engineering, Hunan Institute of Engineering, Xiangtan, 411104, China

autor

Au C.

• College of Chemistry and Chemical Engineering, Hunan Institute of Engineering, Xiangtan, 411104, China

autor

Yi B.

• College of Chemistry and Chemical Engineering, Hunan Institute of Engineering, Xiangtan, 411104, China

Bibliografia

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