Optimal methods to determine the physical parameters for activated carbon adsorption

Yu Chun Chiang, Pen Chi Chiang, Hung Lung Chiang, E. E. Chang

Research output: Contribution to journalArticlepeer-review


The objectives of this research were to examine the physical characteristics of activated carbons made of different materials, thereby suggest a preferable approach to obtaining the optimal estimation of the parameters for the activated carbons by the statistical techniques. After the appropriate pretreatments, the apparent and true densities of activated carbon, adsorption isotherms of argon, nitrogen and mercury, and the adsorptive capacity of benzene were determined by using the recommended approaches. The results showed that the shapes of hysteresis loop indicated that the pores were probably slit-shaped or formed by plate-like particles, which could be confirmed by the SEM examination. It was noted that the apparent density used for pore volume calculation presented a higher possibility of underestimation. Through the use of the statistical techniques, such as factor analysis (FA) and correspondence analysis (CA), the principal physical parameters on adsorption phenomena could be characterized. Finally, the optimal methods for obtaining the surface area and pore volume of activated carbons were suggested.

Original languageEnglish
Pages (from-to)343-361
Number of pages19
JournalToxicological and Environmental Chemistry
Issue number3-4
Publication statusPublished - 1999


  • Activated carbon
  • Adsorption model
  • Correspondence analysis (CA)
  • Factor analysis (FA)
  • Scanning electron microscopy (SEM)

ASJC Scopus subject areas

  • General Environmental Science
  • Environmental Chemistry
  • Toxicology
  • Health, Toxicology and Mutagenesis


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