Comparative studies of various iron-mediated oxidative systems for the photochemical degradation of endosulfan in aqueous solution
作者:Noor S. Shah、Xuexiang He、Javed Ali Khan、Hasan M. Khan、Dominic L. Boccelli、Dionysios D. Dionysiou
DOI:10.1016/j.jphotochem.2015.03.014
日期:2015.6
This study investigated iron-mediated oxidative processes for the photochemical degradation of endosulfan, a chlorinated insecticide and central nervous system disruptor. At UV fluence of 360 mJ/cm2, 52.4% and 32.0% removal of 2.45 μM initial endosulfan was observed by UV/Fe3+ and UV/Fe2+ processes, respectively, at an initial concentration of 17.8 μM iron. The degradation of endosulfan by UV/Fe3+
这项研究调查了铁介导的氧化过程,以光化学降解硫丹,一种氯化杀虫剂和中枢神经系统干扰物。在UV能量通量为360 mJ / cm 2时,在铁的初始浓度为17.8μM时,分别通过UV / Fe 3+和UV / Fe 2+工艺观察到了2.45μM初始硫丹的52.4%和32.0%去除。通过添加过氧化物(例如,H 2 O 2,S 2 O 8 2-或HSO 5 -),UV / Fe 3+或UV / Fe 2+对硫丹的降解作用显着增强。)。之间的UV /过氧化物/ Fe的过程中,在UV通量的99.0%的最高效率的降解360毫焦耳/厘米2通过UV / HSO观察5 - /铁2+与2.45μM[硫丹] 0,17.8μM的[Fe 2 + ] 0,并且49.0μM[HSO 5 - ] 0。通过增加[Fe 2+ ] 0和/或[过氧化物] 0或通过降低[硫丹] 0可以提高硫丹的降解速率常数,而硫丹的初始降解速率随[Fe