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γ‐Irradiation Degradation of Methamidophos
Author(s) -
Zhao Renbang,
Bao Huaying,
Xia Lingyun
Publication year - 2009
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.200990294
Subject(s) - methamidophos , chemistry , degradation (telecommunications) , irradiation , aqueous solution , radical , nuclear chemistry , radiochemistry , environmental chemistry , pesticide , organic chemistry , telecommunications , physics , computer science , nuclear physics , agronomy , biology
The irradiation degradation of methamidophos in aqueous solutions by 60 Co‐γ rays was investigated. The effects of absorbed doses, saturated gas, and the additive of H 2 O 2 on the degradation were also studied. The results showed that the oxidative radical, such as ·OH, played an important role in the irradiation degradation of methamidophos; while the reductive radicals, e − aq and ·H, had no contribution to the degradation. The degradation rate of methamidophos increased with the increase of the irradiation dosage. At certain irradiation dosage, methamidophos could be degraded completely. The degradation rate of methamidophos in the solution saturated with oxygen was higher than those saturated with other gases, which reached 100% when the absorbed dose was 8 kGy. H 2 O 2 degraded methamidophos slowly when it was used alone, but could accelerate the degradation obviously when it was used with irradiation together.