Catalytic wet air oxidation of bisphenol A solution in a batch-recycle trickle-bed reactor over titanate nanotube-based catalysts

Environ Sci Pollut Res Int. 2014 Oct;21(19):11313-9. doi: 10.1007/s11356-014-3042-1. Epub 2014 May 28.

Abstract

Catalytic wet air oxidation (CWAO) is classified as an advanced oxidation process, which proved to be highly efficient for the removal of emerging organic pollutant bisphenol A (BPA) from water. In this study, BPA was successfully removed in a batch-recycle trickle-bed reactor over bare titanate nanotube-based catalysts at very short space time of 0.6 min gCAT g(-1). The as-prepared titanate nanotubes, which underwent heat treatment at 600 °C, showed high activity for the removal of aqueous BPA. Liquid-phase recycling (5- or 10-fold recycle) enabled complete BPA conversion already at 200 °C, together with high conversion of total organic carbon (TOC), i.e., 73 and 98 %, respectively. The catalyst was chemically stable in the given range of operating conditions for 189 h on stream.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Air
  • Benzhydryl Compounds / chemistry*
  • Catalysis
  • Nanotubes / chemistry*
  • Oxidation-Reduction
  • Phenols / chemistry*
  • Recycling
  • Solutions
  • Titanium / chemistry*
  • Waste Disposal, Fluid / methods
  • Water Pollutants, Chemical / chemistry*

Substances

  • Benzhydryl Compounds
  • Phenols
  • Solutions
  • Water Pollutants, Chemical
  • titanium dioxide
  • Titanium
  • bisphenol A