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논문 기본 정보

자료유형
학술저널
저자정보
Dell'Arciprete, Maria L. (Instituto de Investigaciones FisicoquimicasTeoricas yAplicadas [INIFTA], Facultad de Ciencias Exactas, Universidad Nacional de La Plata) Santos-Juanes, Lucas (Grupo de Procesos de Oxidacion Avanzada. Departamento de Ingenieria Textil y Papelera., Universidad Politecnica de Valencia, Campus de Alcoy. Plaza Ferandiz y Carbonell) Sanz, Antonio Arques (Grupo de Procesos de Oxidacion Avanzada. Departamento de Ingenieria Textil y Papelera., Universidad Politecnica de Valencia, Campus de Alcoy. Plaza Ferandiz y Carbonell) Vicente, Rafael (Grupo de Procesos de Oxidacion Avanzada. Departamento de Ingenieria Textil y Papelera., Universidad Politecnica de Valencia, Campus de Alcoy. Plaza Ferandiz y Carbonell) Amat, Ana M. (Grupo de Procesos de Oxidacion Avanzada. Departamento de Ingenieria Textil y Papelera., Universidad Politecnica de Valencia, Campus de Alcoy. Plaza Ferandiz y Carbonell) Furlong, Jorge P. (LADECOR, Departamento de Quimica, Facultad de Ciencias Exactas, Universidad Nacional de La Plata) Martirea, Daniel O. (Instituto de Investigaciones FisicoquimicasTeoricas yAplicadas [INIFTA], Facult) Gonzalez, Monica C.
저널정보
한국광과학회 Photochemical & photobiological sciences : an international journal Photochemical & photobiological sciences : an international journal 제8권 제7호
발행연도
2009.1
수록면
1,016 - 1,023 (8page)

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The reactivity of hydroxyl radicals ($HO^{\cdot}$) towards three neonicotonoid insecticides, namely imidacloprid, thiacloprid and acetamiprid was investigated. These radicals were generated by photolysis of $H_2O_2$ solutions. Flash photolysis experiments were used to determine the rate constants of $5.5{\times}10^{10}M^{-1}s{-1}$, $6{\times}10^{10}M^{-1}s^{-1}$, and $7.5{\times}10^{10}M^{-1}s^{-1}$, for the reactions of $HO^{\cdot}$ with acetamiprid, imidacloprid, and thiacloprid, respectively. Continuous irradiation experiments in the absence and presence of $H_2O_2$ allowed the identification and toxicity evaluation of the primary photo- and oxidation products of the insecticides. In all cases, the less toxic 6-chloronicotinic acid was found to be the major product at higher degrees of oxidation. The results reported here indicate that the half life of the insecticides due to their reaction with $HO^{\cdot}$ radicals in natural aquatic reservoirs may vary between 5 h and 19 days, and therefore the hydroxyl radical-mediated oxidation may be a significant abiotic elimination route. However, elimination of the insecticide under such conditions might not improve the quality of the contaminated water, as the primary products of degradation still show considerable toxicity to Vibrio fischeri assays.

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