Investigation of phosphate removal using sulphate-coated zeolite for ion exchange

Jae Woo Choi, Seok Won Hong, Dong Ju Kim, Sang-Hyup Lee

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Sulphate-coated zeolite (SCZ) was characterized and employed for the removal of phosphate from aqueous solutions using both batch and column tests. Batch experiments were conducted to assess the sulphate dilution ratio, reaction time for coating, surface washing and calcination temperature during the synthesis of SCZ. Langmuir isotherm and pseudo-first-order models were suitable to explain the sorption characteristics of phosphate onto the SCZ. Equilibrium tests showed that SCZ was capable of removing phosphate, with a maximum binding energy =30.2mgg1, compared to other adsorbents, such as activated alumina and ion exchange resin. The Thomas model was applied to the adsorption of phosphate to predict the breakthrough curves and the parameters of a column test. The model was found to be suitable for describing the adsorption process of the dynamic behaviour of the SCZ column. The total adsorbed quantity and equilibrium uptake of phosphate related to the effluent volumes were determined by evaluating the breakthrough curves obtained under the allowed conditions. The results of batch and column experiments, as well as the low cost of the adsorbent, suggested that SCZ could be used as an adsorbent for the efficient and cost-effective removal of phosphate from aqueous solution.

Original languageEnglish
Pages (from-to)2329-2335
Number of pages7
JournalEnvironmental Technology (United Kingdom)
Volume33
Issue number20
DOIs
Publication statusPublished - 2012 Oct 1

Fingerprint

Zeolites
Ion Exchange
zeolite
Sulfates
ion exchange
Ion exchange
Phosphates
sulfate
phosphate
Adsorbents
breakthrough curve
Adsorption
aqueous solution
Activated alumina
Ion Exchange Resins
adsorption
Costs and Cost Analysis
Aluminum Oxide
phosphate removal
Binding energy

Keywords

  • ion exchange
  • pellet
  • phosphate
  • sulphate coated
  • zeolite

ASJC Scopus subject areas

  • Environmental Chemistry
  • Waste Management and Disposal
  • Water Science and Technology

Cite this

Investigation of phosphate removal using sulphate-coated zeolite for ion exchange. / Choi, Jae Woo; Hong, Seok Won; Kim, Dong Ju; Lee, Sang-Hyup.

In: Environmental Technology (United Kingdom), Vol. 33, No. 20, 01.10.2012, p. 2329-2335.

Research output: Contribution to journalArticle

Choi, Jae Woo ; Hong, Seok Won ; Kim, Dong Ju ; Lee, Sang-Hyup. / Investigation of phosphate removal using sulphate-coated zeolite for ion exchange. In: Environmental Technology (United Kingdom). 2012 ; Vol. 33, No. 20. pp. 2329-2335.
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