Kinetic and thermodynamic investigations on arsenic adsorption onto dolomitic sorbents

Y. Salameh, N. Al-Lagtah, M.N.M. Ahmad, S.J. Allen, G.M. Walker

Research output: Contribution to journalArticlepeer-review

53 Citations (Scopus)


Arsenic and its compounds are toxic pollutants for the environment and all living organisms. At present, there is considerable interest in studying new sorbent materials for the removal of arsenic from aqueous solutions. This work discusses the feasibility of arsenic uptake onto dolomite which is considered to be a potential inexpensive adsorbent. Thermodynamic and kinetic experiments were undertaken to assess the capacity and rate of As uptake onto dolomite. Experimental data were mathematically described using adsorption kinetic models, namely pseudo-first-order and pseudo-second-order models. The arsenic removal was found to be dependent on the dosage of dolomite, adsorbent particle size and the presence of various anions. Thermodynamic results indicate that the adsorption follows an exothermic chemisorption process. The experimental data indicate successful removal of As(V) ion from aqueous solution indicating that dolomite be used as an inexpensive treatment process. (C) 2010 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)440-446
Number of pages7
JournalChemical Engineering Journal
Issue number2
Publication statusPublished - Jun 2010

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)
  • Industrial and Manufacturing Engineering
  • Environmental Chemistry


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