ACTIVATED CARBONS PREPARED FROM POPLAR WOOD: CHARACTERISATION AND PHENOL ADSORPTION


Demiral H.

FRESENIUS ENVIRONMENTAL BULLETIN, vol.25, no.11, pp.4669-4679, 2016 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 25 Issue: 11
  • Publication Date: 2016
  • Journal Name: FRESENIUS ENVIRONMENTAL BULLETIN
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED)
  • Page Numbers: pp.4669-4679
  • Eskisehir Osmangazi University Affiliated: Yes

Abstract

Poplar wood was used to prepare activated carbon by chemical activation using sodium hydroxide (NaOH). The influences of the impregnation ratios and the activation temperatures were investigated. The activated carbons were characterized using N-2 adsorption, infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and elemental analysis. The highest surface area (1073 m(2)/g) and total pore volume (0.610 cm(3)/g) were obtained at a carbonization temperature of 800 degrees C with an impregnation ratio of 3/1. The resulting activated carbon was used for removal of phenol from aqueous solution. The effects of the initial pH, temperature and contact time were investigated. The adsorption isotherm studies were carried out and the obtained data were analysed by Langmuir, Freundlich and Temkin equations. The Langmuir isotherm equation showed better fit for all temperatures. Pseudo first order, pseudo second order, and intraparticle diffusion kinetic models were used in this study for describing the adsorption process. The rate of adsorption was found to conform to the pseudo-second-order kinetic model.