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Photochemical behavior of the fungicides carbendazim and metalaxyl in aqueous solutions using advanced oxidation processes [electronic resource].

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Ismail, Ahmed A

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Language: English Summary language: Arabic Description: p.101-110Other title:

التحطم الكيمو-ضوئى للمبيدات الفطرية (كاربندازيم زميتالاكسايل) فى البيئة المائية باستخدام عمليات الأكسدة المتقدمة [Added title page title]

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Alexandria journal of agricultural research, 2010 v. 55 (2) [electronic resource].

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In: Alexandria Journal of Agricultural Research 2010.v.55(2)Summary: To elucidate the photochemical behavior of the fungicides carbendazjm and metalaxyl in superficial waters, photolysis studies have been carried out in aqueous solutions using UV- photo catalytic system, Ferric chloride, Ferrous sulphate and zinc oxide alone or in combination with hydrogen peroxide. HPLC has been used for residues determination. Results clearly exhibited that, carbendazim and metalaxyl were almost stable in the dark while UV irradiation decreased their stabilities. T1/2 ranged between 2.26 and 8.88 hr. for carbendazim fungicide and from 0.5 to 2.57 he. for metalaxyl under the conditions of photo-Fenton reactions. The degradation rate of the two tested fungicides were greatly enhanced by Fe(III) than Fe(II).

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To elucidate the photochemical behavior of the fungicides carbendazjm and metalaxyl in superficial waters, photolysis studies have been carried out in aqueous solutions using UV- photo catalytic system, Ferric chloride, Ferrous sulphate and zinc oxide alone or in combination with hydrogen peroxide. HPLC has been used for residues determination. Results clearly exhibited that, carbendazim and metalaxyl were almost stable in the dark while UV irradiation decreased their stabilities. T1/2 ranged between 2.26 and 8.88 hr. for carbendazim fungicide and from 0.5 to 2.57 he. for metalaxyl under the conditions of photo-Fenton reactions. The degradation rate of the two tested fungicides were greatly enhanced by Fe(III) than Fe(II).

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