TY - JOUR
T1 - Comparative study of sonocatalytic enhancement for removal of bisphenol A and 17α-ethinyl estradiol
AU - Her, Namguk
AU - Park, Jong Sung
AU - Yoon, Jaekyung
AU - Sohn, Jinsik
AU - Lee, Sangho
AU - Yoon, Yeomin
PY - 2011/6/1
Y1 - 2011/6/1
N2 - A series of experiments were conducted to compare the effectiveness of various catalysts in the production of H2O2 and in the degradation of endocrine disrupting compounds (EDCs), including bisphenol A (BPA) and 17α-ethinyl estradiol (EE2), in water by sonocatalysis using ultrasonication at 28 kHz with a contact time of 60 min. The catalysts included a stainless steel wire mesh (SSWM), glass beads (GB), TiO2 powder, a Ti-wire mesh (Ti-WM), and an oxidized Ti-wire mesh (TiO2-WM). The most effective catalyst combination for the production of 215.7 μM of H 2O2, was the use of SSWM with TiO2 as the cocatalyst. A significantly lower sonochemical reactivity was observed when there was no added catalyst (18.5 μM), SSWM (61.3 μM), and TiO2 alone (134.1 μM). For the given contact time and frequency, sonochemical reactivity was determined from the rate constants for H2O2 production. EDC sonodegradation occurred in the following order: SSWM + TiO2 (powder) > GB > TiO2 (powder) > SSWM + GB > TiO2-WM > Ti-WM > SSWM > no catalyst, although the catalyst type, surface area, and amount were varied. Our findings suggest that TiO2-WM can be continuously reused for the catalysis of H 2O2 production and the degradation of EDC.
AB - A series of experiments were conducted to compare the effectiveness of various catalysts in the production of H2O2 and in the degradation of endocrine disrupting compounds (EDCs), including bisphenol A (BPA) and 17α-ethinyl estradiol (EE2), in water by sonocatalysis using ultrasonication at 28 kHz with a contact time of 60 min. The catalysts included a stainless steel wire mesh (SSWM), glass beads (GB), TiO2 powder, a Ti-wire mesh (Ti-WM), and an oxidized Ti-wire mesh (TiO2-WM). The most effective catalyst combination for the production of 215.7 μM of H 2O2, was the use of SSWM with TiO2 as the cocatalyst. A significantly lower sonochemical reactivity was observed when there was no added catalyst (18.5 μM), SSWM (61.3 μM), and TiO2 alone (134.1 μM). For the given contact time and frequency, sonochemical reactivity was determined from the rate constants for H2O2 production. EDC sonodegradation occurred in the following order: SSWM + TiO2 (powder) > GB > TiO2 (powder) > SSWM + GB > TiO2-WM > Ti-WM > SSWM > no catalyst, although the catalyst type, surface area, and amount were varied. Our findings suggest that TiO2-WM can be continuously reused for the catalysis of H 2O2 production and the degradation of EDC.
UR - http://www.scopus.com/inward/record.url?scp=79960028145&partnerID=8YFLogxK
U2 - 10.1021/ie102419v
DO - 10.1021/ie102419v
M3 - Article
AN - SCOPUS:79960028145
SN - 0888-5885
VL - 50
SP - 6638
EP - 6645
JO - Industrial and Engineering Chemistry Research
JF - Industrial and Engineering Chemistry Research
IS - 11
ER -