Bisphenol A treatment by the hot persulfate process: Oxidation products and acute toxicity


Olmez-Hanci T. , ARSLAN-ALATON I., GENC B.

JOURNAL OF HAZARDOUS MATERIALS, vol.263, pp.283-290, 2013 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 263
  • Publication Date: 2013
  • Doi Number: 10.1016/j.jhazmat.2013.01.032
  • Title of Journal : JOURNAL OF HAZARDOUS MATERIALS
  • Page Numbers: pp.283-290

Abstract

In this study, a thermally activated persulfate oxidation process was investigated to treat aqueous Bisphenol A (BPA) solution. The effect of temperature (40-50-60-70 degrees C), initial pH (pH = 3.0, 6.5, 9.0 and 11.0) and persulfate concentration (0-20 mM) on bisphenol A (BPA) and TOC removals was examined. The activation energy for hot persulfate oxidation of BPA was calculated as 184 +/- 12 kJ/mol. Acidic and neutral pH values were more favorable for BPA oxidation than basic pH values. TOC removals did not exhibit a specific pattern with varying initial pHs. Gas chromatography/mass spectrometry was employed to identify oxidation products. Several aromatic and a few aliphatic compounds could be detected including benzaldehyde, p-isopropenyl phenol, 2,3-dimethyl benzoic acid, 3-hydroxy-4-methyl-benzoic acid, ethylene glycol monoformate and succinic acid. Acute toxicity tests conducted with Vibrio fischeri indicated that the inhibitory effect of 88 mu M BPA solution originally being 58%, increased to 84% after 30 min and decreased to 22% after 90 min hot persulfate treatment that could be attributed to the formation and subsequent disappearance of oxidation products. (C) 2013 Elsevier B.V. All rights reserved.