Kinetic studies of endosulfan photochemical degradations by ultraviolet light irradiation in aqueous medium

Abstract

Kinetic studies of endosulfan photochemical degradation in controlled aqueous systems were carried out by ultraviolet light irradiation at lambda = 254 nm. The photolysis of (alpha + beta: 2 + 1) endosulfan, alpha-endosulfan and beta-endosulfan were first-order kinetics. The observed rate constants obtained from linear least-squares analysis of the data were 1 x 10(-4) s(-1); 1 x 10(-4) s(-1); and 2 x 10(-5) s(-1), respectively, and the calculated quantum yields (phi) were 1, 1 and 1.6, respectively. Preliminary differential pulse polarographic (DPP) analysis allowed to observe the possible endosulfan photochemical degradation pathway. This degradation route involves the formation of the endosulfan diol, its transformation to endosulfan ether and finally the ether's complete degradation by observing the potential shifts.

Elimination of pesticide residues from virgin olive oil by ultraviolet light: Preliminary results

“…Preliminary differential pulse polarographic (DPP) analysis indicated the possible endosulfan photochemical degradation pathway. This degradation route involves the formation of the endosulfan diol, its transformation to endosulfan ether and finally the ether's complete degradation by observing the potential shifts [32].…”

Effect of fulvic acid on the photochemical degradation of methylparathion

“…[11] Photolysis of methylparathion in the presence of fulvic acid was done with a reactor described in an earlier study. [18] Irradiation was done with a multiband ultraviolet lamp (Mineralight UVGL-58) at λ = 366 nm.…”

Enzymatic Bioremediation of Endosulfan in Soil Using Ligninolytic Extract of Spent Mushroom Compost of Pleurotus Ostreatus

“…Despite the ban, indiscriminate use of OCPs for farm activities is still in practice (Yadav et al, 2017 pesticides are located in overpopulated tropic and sub tropic areas (Wang et al, 2016; Buah-Kwofie and Humphries, 2017) but due to atmospheric circulation, they could be transported to areas where there was no history of their usage and production (Hageman et al, 2015). Endosulfan, an important OCP, was also banned but its residues are still a bio concern in the ecosystem (Hu et al, 2014;Lal et al, 2010;Barcelo-Quintal et al, 2008;Wang et al, 2016) and because of their widespread nature they are considered nowadays a "global pollutant" and a challenge for land management agencies. The conventional methods for remediation of contaminated soil are costly and not ecofriendly (Ojuederie and Babalola, 2017), an alternative effective approach for detoxification of Endosulfan in the soil is an environmental responsibility.…”