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The degradation and mineralization of acephate by ionization irradiation
Author(s) -
Yang Jing,
Gao Yanpan,
Liu Weihua,
Ge Wei,
Zhao Renbang
Publication year - 2014
Publication title -
environmental progress and sustainable energy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.495
H-Index - 66
eISSN - 1944-7450
pISSN - 1944-7442
DOI - 10.1002/ep.11983
Subject(s) - acephate , chemistry , radical , mineralization (soil science) , inorganic ions , ion , aqueous solution , inorganic chemistry , nitrogen , organic chemistry , pesticide , agronomy , biology
The degradation and mineralization of acephate in aqueous solutions by 60 Co‐γ irradiation were investigated. The acephate was dissolved in different pH buffer solutions and purged for 30 min using anticipate gas. It was found that the degradation ratio of acephate increased gradually with the absorbed dose, and the inorganic ions,SO 4 2 −,PO 4 3 −, andNH 4 + , were generated in the irradiated solutions. For the solutions without oxygen, the degradation ratio of acephate in N 2 ‐saturated solutions containing t ‐BuOH was the highest, and that in N 2 ‐saturated solutions was higher than that in N 2 O‐saturated solutions. However, the total concentration of inorganic ions in N 2 O‐saturated solutions was higher than that in the other solutions. Moreover, the concentration ofNH 4 +in N 2 ‐saturated solutions containing t ‐BuOH was larger than that ofSO 4 2 −andPO 4 3 −, whereas inN 2 ‐or N 2 O − saturated solutions, the concentrations of inorganic ions were in the order ofSO 4 2 −>PO 4 3 −>NH 4 + . In the air‐saturated and O 2 ‐saturated solutions, it was found that the concentration of inorganic ions generated was in the order ofSO 4 2 −>PO 4 3 −>NH 4 + . The degradation degree of acephate and the concentrations of inorganic ions in O 2 ‐saturated solutions were higher than those in the air‐saturated solutions. The result showed that both of the oxidative and reductive radicals could degrade the acephate, and the oxidative could improve the mineralization of acephate. It was further concluded that it was easier for the reductive radicals to attack the bonds around N than other bonds around S and P, and the SC and PS bond are easily attacked by oxidative radicals. © 2014 American Institute of Chemical Engineers Environ Prog, 34: 324–332, 2015