Competitive Adsorption of Cu2+, Pb2+ and Ni2+ on Thiourea Modified Spent Grated Coconut (Cocos Nucifera)

  • Abstract
  • Keywords
  • References
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  • Abstract

    The behavior of thiourea spent grated Cocos nucifera (TSGC) as an adsorbent for simultaneous removal of Cu2+, Pb2+ and Ni2+ ions from aqueous solutions in ternary system was investigated. TSGC was characterized by using a CHNOS analyser, a Fourier transform infrared (FTIR) spectrometer and a scanning electron microscope coupled with energy dispersive spectrometer (SEM-EDS). Complexation was one of the main mechanisms involved as indicated by the FTIR spectra. The pseudo-second-order and Langmuir isotherm models best fit to the adsorption experimental data. The maximum adsorption capacities (mmol.g-1) of heavy metal ions by TSGC were in the order of Cu2+ (1.38) > Pb2+ (0.32) > Ni2+ (0.24). Overall, TSGC showed a higher selectivity for the Cu2+ ion.



  • Keywords

    adsorption; Cocosnucifera; selectivity; hard-soft acid base; electronegativity; ionic radii

  • References

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Article ID: 25700
DOI: 10.14419/ijet.v7i4.42.25700

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