Thermal Adsorption and Catalytic Photodegradation Studies of Carbendazim Fungicide in Natural Soil and Water

Abstract

Adsorption characteristics and catalytic photodegradation of carbendazim (methyl benzimidazol-2-ylcarbamate) have been investigated in Kurdistan natural soil and different natural waters (drinking, river, lake and ground water). Physico-chemical properties of the natural soil and water were determined. The equilibrium adsorption of carbendazim onto studied soil samples described by Freundlich adsorption model. The catalytic photodegradation processes were studied in aqueous Titanium dioxide (TiO 2 ) suspensions under UV radiation. The kinetic study was done by monitoring the concentration during the degradation process, using High performance Liquid Chromatography (HPLC), coupled with UV-visible spectrophotometer. It was found that the photocatalytic degradation process in this work exhibited pseudo first-order kinetics. The rates of catalytic photodegradation of carbendazim in natural water were lower than that in distilled water.

Bio-adsorption of triadimenol pesticide from aqueous solutions using activated sludge of dairy plants

“…Relatively few works have addressed the elimination of triadimenol from water [10]. Several technological treatment methods such as catalytic photodegradation [11], Fenton-coagulation [12], flocculation [13], extraction [14] and disinfection [15] could be used for the removal of pesticides from water. However, many of these methods are costly, produce by-products, and fail to reduce the concentration of these pollutants to an acceptable level.…”

Parametric study on degradation of fungicide carbendazim in dilute aqueous solutions using nano TiO2

“…Work on synthetic and natural dye pigments as photosensitizers has also been investigated for the visible light photodegradation of the colorless solution of this fungicide [17]. Thermal adsorption and catalytic photodegradation of carbendazim in river water and soil has been studied and the effect of nitrite and nitrates ions was observed [18]. Xiao et al [19] had studied the sonolytic ozonation of carbendazim with the variation in pH with ozone dose.…”