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Environmental Science and Pollution Research

, Volume 19, Issue 8, pp 3250–3256 | Cite as

Biosorption of cadmium(II) and copper(II) ions from aqueous solution by core of Artocarpus odoratissimus

  • Linda B. L. Lim
  • Namal Priyantha
  • D. T. B. Tennakoon
  • Muhd Khairud Dahri
Research Article

Abstract

Purpose

This research is on the evaluation of biosorption capability of the core of Artocarpus odoratissimus (Tarap), grown in Brunei Darussalam, towards Cd(II) and Cu(II) ions present in synthetic solutions, and to characterize the surface of Tarap particles.

Methods

Thermogravimetric analysis and surface titrations were conducted to characterize the surface of dried Tarap core particles. Atomic absorption spectroscopic measurements were conducted to determine the extent of removal of Cd(II) and Cu(II) under different experimental conditions.

Results

Mass reductions associated with many exothermic reaction peaks were observed beyond 200°C up to 650°C indicating the combustion of organic matter in Tarap. Dried particles of core of Tarap bear a negative surface charge promoting strong interaction towards positively charged ions, such as Cu(II) and Cd(II). Biosorption of the two metal ions on Tarap, which is relatively high beyond pH = 4, occurs within a short period of exposure time. The extent of biosorption is enhanced by acid treatment of the biosorbent, and further it does not significantly depend on the presence of nonreacting ions up to an ionic strength of 2.0 M.

Conclusion

Strong attraction between each metal ion and the biosorbent is attributed to the negative surface charge on the biosorbent within a broad pH range. Acid treatment of the biosorbent improves sorption characteristics, suggesting that ion exchange plays an important role in the metal ion—biosorbent interaction process.

Keywords

Biosorption Artocarpus odoratissimus Copper Cadmium Surface titration 

Notes

Acknowledgment

The authors wish to thank the Universiti Brunei Darussalam for providing financial assistance through the research grant numbered, UBD/PNC2/2/RG/1(165).

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Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  • Linda B. L. Lim
    • 1
  • Namal Priyantha
    • 2
  • D. T. B. Tennakoon
    • 1
  • Muhd Khairud Dahri
    • 1
  1. 1.Department of Chemistry, Faculty of ScienceUniversiti Brunei DarussalamNegaraBrunei Darussalam
  2. 2.Department of ChemistryUniverisity of PeradeniyaPeradeniyaSri Lanka

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