Comparative study of sonocatalytic enhancement for removal of bisphenol A and 17α-ethinyl estradiol

Namguk Her, Jong Sung Park, Jaekyung Yoon, Jinsik Sohn, Sangho Lee, Yeomin Yoon

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

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.

Original languageEnglish
Pages (from-to)6638-6645
Number of pages8
JournalIndustrial and Engineering Chemistry Research
Volume50
Issue number11
DOIs
StatePublished - 1 Jun 2011

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