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Photochemically-Induced Fluorescence (PIF) and UV-Visible absorption determination of diuron, kinetic of photodegradation and rate of leach ability in soils.

Several physicochemical studies were undertaken and evaluated for diuron pesticide. At first time, we have studied in aqueous water the kinetic of photodegradation by UV-visible absorption method for the diuron; second order kinetic with lifetime’s values of 0.5 hours is found. This compound exhibited fluorescence emission only under UV irradiation because of their transformation into fluorescent photoproducts. The influence of various physicochemical parameters affecting the sensitivity of the PIF method, such as solvent system, pH, and UV irradiation time was investigated. PIF method was, therefore performed in optimal analytical condition. The limits of detection (LOD) are particularly low, ranging between 8.5 and 96 ng/mL according to the solvent. Finally, a study destined to investigate the rate of leach ability in soils has been conducted in agricultural soil. The obtained rate of infiltration is: 12.7 mm/min. These results show that diuron has high potential of pollution of groundwater.

Auteur(s) : Med Lemine Ould Cheikh Ould Saleck, El Hadji Tombé Bodian, Ibrahima. Sarr, Souleymane Sambou, Alphonse Mendy, Diène Diégane Thiaré, Diégane Sarr, Chei
Pages : 160-167
Année de publication : 2018
Revue : Proceedings of the Global Symposium on Soil Pollution 2018. Rome, Italy
Type : Article
Mise en ligne par : COLY Atanasse