Fractal approach of activated carbons from solid waste materials

K. László, A. Bóta, L. G. Nagy, G. Subklew, M. J. Schwuger

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Carbonaceous composite materials were produced from various pyrolyzed organic waste materials by steam activation. Fractal dimensions derived from SAXS and adsorption measurements were used to explain the changes in the matrix and the surface microstructure, due to the activation. The comparison of the fractal dimensions from SAXS and nitrogen adsorption data can be successfully applied to understand the development of the porous structure. In these materials, of heterogeneous matrix, no correlation was found between the B.E.T. specific surface area and the fractal dimensions derived from various methods. The adsorption of different substrates is disturbed by the chemical heterogeneity of the surface. In these cases, the applicability of aqueous solutions in the description of the surface geometry might be questioned.

Original languageEnglish
Pages (from-to)29-37
Number of pages9
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume138
Issue number1
DOIs
Publication statusPublished - Jun 30 1998

Keywords

  • Activated carbon
  • Adsorption
  • Fractal
  • Polyethyleneterephthalate
  • Recycling
  • SAXS

ASJC Scopus subject areas

  • Surfaces and Interfaces
  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

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