Oxidation of benzophenone-3 during water treatment with ferrate(VI)

Ferrate(VI) oxidation of tetrabromobisphenol A in comparison with bisphenol A

“…The reactions were initiated by adding an aliquot of Fe(VI) stock solution to the suspensions containing TBBPA under rapid mixing. At certain time intervals, 5 mL of the reaction solution was sampled for the measurement of residual Fe(VI) concentrations using a ABTS method at 415 nm (Lee et al, 2005b), and 1 mL of the reaction solution was also sampled and quenched with a thiosulfate solution (5 mM, 0.1 mL) to measure residual concentrations of TBBPA by HPLC, then the apparent second-order rate constants (k app ) of Fe(VI) reaction with TBBPA were calculated by plotting the natural logarithm of the TBBPA concentrations with the Fe(VI) exposure (Yang et al, 2011a;Yang and Ying, 2013). All kinetic experiments were carried out in duplicate and the pH variation was below 0.1 units.…”

“…The conductivity and pH values were determined using a Thermo Orin 5 star pH meter (Thermo Fisher Scientific, USA), which was calibrated using standard reagents (1314 mS cm À1 and pH 4.0, 7.0, and 10.0, Thermo China). TOC and DOC were measured using a Shimadzu TOC-V and TNM-1 analyzer (Shimadzu Scientific Instruments, Columbia, MD) (Yang et al, 2012;Yang and Ying, 2013). Alkalinity and turbidity were measured by standardized titrimetric analysis and spectrophotometric method respectively.…”

“…For example, Zhang et al (2012) have shown that humic acid and SiO 2À 3 notably reduced the bisphenol A (BPA) removal, tert-butanol slightly decreased the BPA removal, and the existence of HCO À 3 slightly enhanced the BPA removal by Fe(VI). Yang and Ying (2013) have shown that humic acid, Mn 2þ and NaCl significantly decreased the removal efficiency of sunscreen agent benzophenone-3 by Fe(VI), while Cu 2þ enhanced the removal. However, NH þ 4 , NO À 3 , Fe 3þ and Fe 2þ had no effects on benzophenone-3 removal within the tested concentrations.…”

“…(1)) was used to describe the Fe(VI) oxidation of TBBPA in the phosphate buffer solutions (Lee et al, 2005a(Lee et al, , 2009Yang et al, 2011a;Yang and Ying, 2013). The second-order rate constants (k app ) were determined under pseudo-first-order conditions with Fe(VI) concentrations in excess to TBBPA and calculated by using Eq.…”

Application of ultrasound for degradation of benzophenone-3 in aqueous solutions

“…Ozonation, peroxone oxidation, photo and fungal degradation, and oxidation with ferrate (VI) have been some of the techniques employed by different groups to remove BP3 (Gago-Ferrero et al 2012Yang and Ying 2013). However, the effectiveness of ultrasound irradiation (US) on the BP3 removal has not been explored.…”