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

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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 %.

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Authors and Affiliations

  1. Engineering Research Center of Seafood of Ministry of Education, Special Sub-center of Shellfish of National Research and Development Center of Agriculture Product Processing Technology of Ministry of Agriculture, School of Food Science and Technology, Dalian, 116034, P. R. China

    Hang Qi, Xiao Jiang, Dayong Zhou, Beiwei Zhu, Lei Qin & Chun Ma

  2. Graduate School of Natural Science and Technology, Okayama University, Okayama, 700-8530, Japan

    Yoshiyuki Murata

  3. Post-Harvest Technology Division, Agri-food and Veterinary Authority of Singapore, Singapore, 718915, Singapore

    Yihang Ong

Authors
  1. Hang Qi
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  2. Xiao Jiang
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  3. Dayong Zhou
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  4. Beiwei Zhu
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  5. Lei Qin
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  6. Chun Ma
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  7. Yihang Ong
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  8. Yoshiyuki Murata
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Correspondence to Beiwei Zhu.

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Qi, H., Jiang, X., Zhou, D. et al. Removal of heavy metals in aqueous solution using Antarctic krill chitosan/hydroxyapatite composite. Fibers Polym 14, 1134–1140 (2013). https://doi.org/10.1007/s12221-013-1134-z

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  • DOI: https://doi.org/10.1007/s12221-013-1134-z

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