Effects of Organic Acid Radicals on Degradation of Orange II in UV-Fenton System with Hydroxyl-Fe-Pillared Bentonite as Catalyst
In this paper, the effects of organic acid radicals on degradation of Orange II in UV-Fenton system with hydroxyl-Fe-pillared bentonite as catalyst were studied in detail. The results showed that the rate constants of UV-Fenton reaction will decrease when the system contains sodium citrate or sodium malonate. While the rate of Orange II degradation in UV-Fenton system could increase up to 33.3% and 41.7% when EDTA and sodium oxalate were present, respectively. As the additional TOC of EDTA is higher than sodium oxalate, adding sodium oxalate is a more promising enhanced method for Orange II degradation in UV-Fenton system. The rate of Orange II degradation could increase 25%, 42% and 175% when the concentrations of additional sodium oxalate increased up to 0.1 mM, 0.2 mM and 0.4 mM, respectively.
J. X. Chen et al., "Effects of Organic Acid Radicals on Degradation of Orange II in UV-Fenton System with Hydroxyl-Fe-Pillared Bentonite as Catalyst", Advanced Materials Research, Vol. 159, pp. 172-175, 2011