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

  • Authors

    • N. N. Dilah
    • M. A.K.M. Hanafiah
    • K. Khalid
    • S. C. Ibrahim
    • A. S. Hamzah
    2018-12-29
    https://doi.org/10.14419/ijet.v7i4.42.25700
  • adsorption, Cocosnucifera, selectivity, hard-soft acid base, electronegativity, ionic radii

  • 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.

     

     

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    N. Dilah, N., A.K.M. Hanafiah, M., Khalid, K., C. Ibrahim, S., & S. Hamzah, A. (2018). Competitive Adsorption of Cu2+, Pb2+ and Ni2+ on Thiourea Modified Spent Grated Coconut (Cocos Nucifera). International Journal of Engineering & Technology, 7(4.42), 148-151. https://doi.org/10.14419/ijet.v7i4.42.25700