Removal of heavy metals in aqueous solution using Antarctic krill chitosan/hydroxyapatite composite

Hang Qi, Xiao Jiang, Dayong Zhou, Beiwei Zhu, Lei Qin, Chun Ma, Yihang Ong, Yoshiyuki Murata

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Discarded Antarctic krill shells can be used to prepare chitosan and adsorption materials in an attempt to save resource and protect environment. The optimal conditions of composite materials preparation were as follows: mass ratio of CS and HA was 2:1 at 40 °C, pH 10-10.5, volume ratio of chitosan and Ca(NO3)2 was 2:1 over a period of 1 day. Under these conditions, the Cr (VI) removal rate was about 75±8 %. SEM, TEM, XRD, FTIR, DT-TGA analysis indicated that CS/HA composite was made up of CS and HA and it possessed good mechanical strength and thermal stability. The ability to remove Cd (II), Cr (III) and Cu (II) in aqueous was high, and the optimal conditions were as follows: a contact time of 60 min at 35 °C and pH 6-7. The removal rates of all three heavy metals were above 90 %.

Original languageEnglish
Pages (from-to)1134-1140
Number of pages7
JournalFibers and Polymers
Volume14
Issue number7
DOIs
Publication statusPublished - Jul 1 2013

Keywords

  • Antarctic krill shells
  • Chitosan
  • Heavy metals
  • Hydroxyapatite
  • Preparation

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Polymers and Plastics

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