Article

Water, Air, & Soil Pollution

, Volume 223, Issue 5, pp 2463-2472

Adsorptive Removal of Pentachlorophenol by Anthracophyllum discolor in a Fixed-Bed Column Reactor

  • Olga RubilarAffiliated withScientific and Technological Bioresource Nucleus, Universidad de La Frontera Email author 
  • , Gonzalo R. TortellaAffiliated withScientific and Technological Bioresource Nucleus, Universidad de La Frontera
  • , Raphael CuevasAffiliated withScientific and Technological Bioresource Nucleus, Universidad de La Frontera
  • , Mara CeaAffiliated withScientific and Technological Bioresource Nucleus, Universidad de La Frontera
  • , Susana Rodríguez-CoutoAffiliated withCEIT, Unit of Environmental Engineering
  • , María Cristina DiezAffiliated withChemical Engineering Department, Universidad de La Frontera

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Abstract

This study investigates pentachlorophenol (PCP) adsorption by the white-rot fungus Anthracophyllum discolor in a fixed-bed column reactor. PCP adsorption at different concentrations (20, 30, and 50 mg L−1) and pH values (5.0, 5.5, and 6.0) was determined and modeled using the Thomas model. Fourier transform infrared spectroscopy (FTIR) was used to identify functional groups of biomass that may participate in the interaction of PCP. The biosorption capacity of A. discolor was pH-dependent, and the PCP adsorbed increased with the decrease in the pH solution. Acid pH values of the influent gave an increase in saturation time in all PCP concentrations. By contrast, the increase in PCP concentration caused that the binding sites were filled quickly, resulting in a decrease in saturation time. The Thomas model was found suitable for describing the entire dynamic of the column with respect to the PCP concentration and pH of the solution. FTIR results showed that amines, carboxylates, alkanes, and C–O groups might participate in the PCP adsorption on the biomass surface. It was concluded that A. discolor biomass was a good adsorbent for PCP removal from influent with mainly acidic pH.

Keywords

Biosorption Pentachlorophenol Anthracophyllum discolor Fixed-bed column Thomas model