A model for irreversible adsorption hysteresis

David A. Vaccari, Maria Kaouris

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

A model is proposed which is capable of describing non-linear irreversible adsorption hysteresis with a single set of coefficients. The model is predicated on the assumption that two types of adsorption sites are present on the sorbent. At the first type of sites, solutes are irreversibly adsorbed in an amount related to the highest concentration at which the sorbent was exposed. Adsorption at the other sites is completely reversible and non-hysteretic. The total adsorption is the sum of the two. However, when the equilibrium concentration is decreased, only the reversible component desorbs. Experimental protocol and mathematical techniques are presented for calibrating and verifying the model. The model is capable of predicting continuous flow column behavior based upon batch isotherm data.

Original languageEnglish
Pages (from-to)797-822
Number of pages26
JournalJournal of Environmental Science and Health. Part A: Environmental Science and Engineering
Volume23
Issue number8
DOIs
StatePublished - 1 Dec 1988

Keywords

  • Adsorption
  • Batch
  • Column
  • Desorption. Hysteresis
  • Irreversible
  • Model

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