Adsorbent minimisation in a two-stage batch adsorber for cadmium removal

Haya Alyasi, Hamish Mackey, Kavithaa Loganathan, Gordon McKay

Research output: Contribution to journalArticle

1 Citation (Scopus)


Cadmium is a toxic metal prevalent in a variety of industrial effluents that is toxic to both humans and animals. This study utilizes nanochitosan, a polymer derived from crustacean shells, as an adsorbent for cadmium removal. The uptake capacity has been determined at 2.01 mmol/g and modelled by Langmuir, Freundlich and Sips isotherms, with the Sips isotherm the most suitable model for the adsorbent. In order to minimise the amount of adsorbent used in a batch treatment process for the cadmium removal, a two-stage batch treatment has been proposed and optimised. A detailed evaluation is made of the consequences of utilizing a less suitable isotherm, and on the benefits of utilizing a two-stage system over a single stage. Both errors from incorrect isotherms and advantages of a two-stage system are most significant at low influent concentrations and high target removal efficiencies, relevant to environmental regulatory discharge limits.

Original languageEnglish
JournalJournal of Industrial and Engineering Chemistry
Publication statusAccepted/In press - 1 Jan 2019



  • Adsorption
  • Batch adsorber
  • Cadmium
  • Heavy metals
  • Nanochitosan
  • Process optimization

ASJC Scopus subject areas

  • Chemical Engineering(all)

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