Synthesis of an innovative calcium-alginate magnetic sorbent for removal of multiple contaminants

S. F. Lim, J. Paul Chen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

55 Scopus citations

Abstract

A new calcium-alginate magnetic sorbent has been prepared by an electrostatic extrusion technique. The sorbent has the calcium alginate as a bio-polymeric shell and iron oxides as magnetic cores. It is characterized by a multifunctional property: ease in separation via magnetic force, and effective adsorption of arsenic(V) and copper ions. It has been found that the equilibrium time of copper and arsenic(V) can be attained in less than 3 and 25 h, respectively. The maximum adsorption capacities of arsenic and copper ions are 6.75 and 60.24 mg/g, respectively, which are much higher than those of commercial adsorbents. Solution pH plays a key role in adsorption. The adsorption of arsenic increases as the pH is decreased. On the other hand, higher pH can enhance adsorption of copper ions.

Original languageEnglish
Pages (from-to)5772-5775
Number of pages4
JournalApplied Surface Science
Volume253
Issue number13 SPEC. ISS.
DOIs
StatePublished - 30 Apr 2007
Externally publishedYes

Keywords

  • Adsorption
  • Arsenic
  • Calcium-alginate magnetic particles
  • Copper

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