An unsteady state retention model for fluid desorption from sorbents

Alireza Bazargan*, Hamed Sadeghi, Ricardo Garcia-Mayoral, Gordon McKay

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

New studies regarding the sorption of fluids by solids are published every day. In performance testing, after the sorbent has reached saturation, it is usually removed from the sorbate bath and allowed to drain. The loss of liquid from the sorbents with time is of prime importance in the real-world application of sorbents, such as in oil spill response. However, there is currently no equation used for modeling the unsteady state loss of the liquid from the dripping sorbent. Here, an analytical model has been provided for modeling the dynamic loss of liquid from the sorbent in dripping experiments. Data from more than 60 sorbent-sorbate systems has been used to validate the model. The proposed model shows excellent agreement with experimental results and is expressed as:. Ut=ULe-Kt+UeIn which Ut (kg/kg) is the uptake capacity of the sorbent at any time t (s) during dripping, UL (kg/kg) is the uptake capacity lost due to dripping, and Ue (kg/kg) is the equilibrium uptake capacity reached after prolonged dripping. K (1/s) is defined as the Kamaan coefficient and controls the curvature of the retention profile. Kamaan (IPA phonetics: kæma{turned script}n) is an Iranian (Farsi/Persian) word meaning "arc" or "curve" and hence the letter K has been designated.

Original languageEnglish
Pages (from-to)127-134
Number of pages8
JournalJournal of Colloid and Interface Science
Volume450
DOIs
Publication statusPublished - 5 Jul 2015

Keywords

  • Analytical model
  • Dynamic oil loss
  • Kamaan coefficient
  • Oil spill remediation
  • Retention curve

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