Degradation of Chlorpyrifos-Ethyle by gamma radiation

H. Meguenni, M. Mahlous, S. Zoubiri


Abstarct: Chlorpyrifos-ethyle is an organophosphorus pesticide causing problems in the central and peripheral nervous system, respiratory system, and the digestive tract of human beings and animals. This study concerns the degradation of chlorpyrifos-ethyle dissolved in acetonitrile by exposition to ionizing radiation. The solution was irradiated to absorbed doses varying from 1 to 50kGy, using a 60Co gamma source. The variation of chlorpyrifos-ethyle concentration as a function of absorbed dose was followed by HPLC analyses. The results showed that the chlorpyrifos-ethyle was completely degraded at the dose of 50kGy. The identification of by-products formed during radiation degradation process of chlorpyrifos-ethyle was made using gas chromatography associated to mass spectrometry (GC-MS). Consequently, three by-products were identified namely: 2-hydroxy-3,5,6,- trichloropyridine (TCP), phosphoric acid, diethyl 3,5,6-trichloro-2-pyridinyl ester, and 2-  furancarboxaldehyde, 5-(hydroxymethyl).   

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UNEP, FAO, WHO, IAEA. Assessment of the state of pollution of the Mediterranean Sea by organophosphorus compounds. MAP Technical Reports, Series n0 58,UNEP, Athens, 1991.

Mori,M.N.; Oikawa, H.; Sampa,M.H.O.; Duarte,C.L. Degradation of chlorpyrifos by ionizing radiation. J. Radioanal. Nucl. Chem. 270(1)(2006) 99-102.

Samuel,O. ; St-Laurent,L. ;Dumas,P. ; Langlois,E.; Gingras, G. Pesticides en milieu serricole. Caractérisation de l’exposition des travailleurs et évaluation des délais de rentrée.Etude et recherche (Rapport), 2002, p. 79.

Trebse,P.;Arcon,I.Degradation of organophosphorus compound by X-ray irradiation. Radiat. Phys. Chem. 67(2003)527-530.

Chen,S.F.; Cao,G.Y.Study on the photocatalytic reduction of dichromate and photocatalytic oxidation of dichlorvos.Chem.60(2005)1308-1315.

Evgenidou,E.; Fytianos,K.; Poulios, I. Semiconductor-sensitized photodegradation of dichlorvos in water using TiO2 and ZnO as catalysts. Appl.Catal. B: Environ. 58(2005) 81-89.

Duarte,C.L.;Mori,M.N.;Kodama,Y.H.;Oikawa,H.;Sampa, M.H.O.Decontamination of pesticide packing using ionisation radiation. Radiat.Phys.Chem.76(2007)1885-1889.

Campos,S.X.;Vieira,E.M.;Cordeiro,P.J.M.; Rodrigues-Fo,E.; Murgu,M.Degradation of the herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) dimethylamine salt by gamma radiation from cobalt-60 in aqueous solution containing humic acid. Radiat. Phys.Chem. 68(2003) 781-786.

Drzewicz,P.;Nalecz-Jawecki,G.; Gryz,M.; Sawicki,J.;Wolkowicz,S.;Trojanowicz,M.Monitoring of toxicity during degradation of selected pesticides using ionizing radiation .Chem. 57(2004)135-145.

Ben Salem,I.; Errami,M.; Mezni,M.; Salghi,R.;EbensoEno,E.; Hammouti,B.; Fattouch,S.; Rabouti, F. Biological, Ionizing and Ultraviolet Radiation and Electrochemical degradation of chlorpyrifos Pesticide in Aqueous Solutions.Int.J.Electrochem.Sci. 9 (2014) 342- 351.

Laplanche,A.; Martin,G.; Tonnard,F. Ozonation schemes of organophosphorus pesticides application in drinking water treatment.Ozone.Sci.Eng.6(1984)207-219.

BavconKralj,M.Oxidation and degradation of organophosphorus compounds. University of Nova Gorica, Graduate school, Study program: Environmental Sciences, Dissertation, Slovenia, 2007,pp.90.


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