Optimisation of the removal of arsenate from water using nanochitosan

Anand Sreeram, Pejman Hadi, Chi Wai Hui, Tareq Al Ansari, Gordon McKay*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

In this study, the removal of arsenate from water using a nanochitosan adsorbent is investigated, and an optimised two-stage batch adsorber system is designed. Nanochitosan is a widely researched biosorbent that is derived from seafood shell waste. An equilibrium study was first conducted with a contact time to reach equilibrium of 3 d. These results were used to minimise the mass of chitosan required in a two-stage batch adsorption process using an optimised design procedure. Subsequently, the adsorption kinetics were modelled, and a contact time study was conducted to acquire the time required using a pseudo-second-order model. The mass and contact time required in an optimised batch absorber system was found to be around 1–3 kg, depending on initial arsenate concentration, and close to 100 min, respectively.

Original languageEnglish
Pages (from-to)235-243
Number of pages9
JournalDesalination and Water Treatment
Volume70
DOIs
Publication statusPublished - Apr 2017

Keywords

  • Arsenate removal
  • Batch adsorption optimisation
  • Nanochitosan

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