Abstract

UPEGUI, S. A.; PENUELA, G. A.  and  BOTERO, L. R.. Inorganic nutrients effect addition over the chlorpyrifos, malathion and methyl parathion degradation. Rev. ing. univ. Medellín [online]. 2011, vol.10, n.18, pp.43-50. ISSN 1692-3324.

In order to evaluate the effect of inorganic nutrient addition (phosphorus or commercial fertilizer) over the microbial degradation capacity present in a solid matrix contaminated with chlorpyrifos, malathion and methyl parathion, microcosms assays were held under controlled conditions of light, moisture and temperature for 30 days. Results showed that even though three treatments microorganisms were able to degrade the three organophosphorus pesticides, microorganisms of phosphorus-enrichment treatment were less efficient to degrade Chlorpyrifos and Methyl Parathion than microorganisms of Fertilizer-enrichment treatment. It was not observed a direct relation between mineralization and microbial pesticides degradation capacity. The microbial activity was not affected by the presence of organophosphorus pesticides.

Keywords : biodegradation; phosphorus; fertilizer; chlorpyrifos; malathion; methyl parathion.

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