Simulation the kinetics of fluoride removal by electrocoagulation (EC) process using aluminum electrodes

Ching Yao Hu, Shang Lien Lo, Wen Hui Kuan

Research output: Contribution to journalArticle

59 Citations (Scopus)

Abstract

A variable order kinetic (VOK) model derived from the Langmuir equation was applied to specify the kinetics of the fluoride removal reaction for electrocoagulation (EC). Synthetic solutions were employed to elucidate the effects of the initial fluoride concentration, the applied current and the initial acidity on the simulation results of the model. The proposed model successfully describes the fluoride removal reaction, except in a system in which the initial concentration of the acid is less than the initial fluoride concentration. The violent change of pH companying with the appearance of equivalence point in the titration curves should be the main reason the VOK model fails to simulate the defluoridation in the systems with an initial acidity higher than initial fluoride concentration.

Original languageEnglish
Pages (from-to)180-185
Number of pages6
JournalJournal of Hazardous Materials
Volume145
Issue number1-2
DOIs
Publication statusPublished - Jun 25 2007
Externally publishedYes

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Keywords

  • Aluminum
  • Electrocoagulation
  • Fluoride
  • Langmuir equation

ASJC Scopus subject areas

  • Chemical Health and Safety
  • Process Chemistry and Technology
  • Safety, Risk, Reliability and Quality
  • Environmental Engineering

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