Isotherm, Thermodynamic and Kinetic Studies on the Adsorption of Cu(II), Cd(II) and Ni(II) Ions from Aqueous Solution onto Coconut Shell Activated Carbon
International Journal of Science and Research (IJSR)

International Journal of Science and Research (IJSR)
www.ijsr.net | Most Trusted Research Journal Since Year 2012

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Research Paper | Chemistry | India | Volume 7 Issue 10, October 2018

Isotherm, Thermodynamic and Kinetic Studies on the Adsorption of Cu(II), Cd(II) and Ni(II) Ions from Aqueous Solution onto Coconut Shell Activated Carbon

Deepak Kumar Dawar, M. K. Bhatnagar, Prakhar Bhatnagar

This study throws light on the use of coconut shell in the removal of heavy metal ions Cu (II), Cd (II) and Ni (II) from the aqueous solution. The adsorption parameters were determined using both Langmuir and Freundlich isotherm models. The adsorption kinetics followed the pseudo-second-order model. This model gives the best-fit to experimental data for heavy metal ions. The second order kinetics give highest correlation coefficient values 0.989, 0.993, 0.995 for Cu2+, Cd2+, Ni2+respectively. Thermodynamic parameters such as change in Gibbs free energy (G0), enthalpy change (H0), and entropy change (S0) were also evaluated. The values showed that the adsorption process for Cu (II), Cd (II) and Ni (II) ions was endothermic. The negative value of G0 suggests the spontaneity of the reaction. The final result of the study suggests that the coconut shell carbon (CNS) has a good efficiency to remove Cu (II), Cd (II) and Ni (II) ions from aqueous solution and it is a cost effective adsorbent too.

Keywords: Activated carbon, Adsorption, Isotherm, Kinetic, thermodynamic, Heavy metal ions, coconut shell

Edition: Volume 7 Issue 10, October 2018

Pages: 12 - 17

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Deepak Kumar Dawar, M. K. Bhatnagar, Prakhar Bhatnagar, "Isotherm, Thermodynamic and Kinetic Studies on the Adsorption of Cu(II), Cd(II) and Ni(II) Ions from Aqueous Solution onto Coconut Shell Activated Carbon", International Journal of Science and Research (IJSR), https://www.ijsr.net/search_index_results_paperid.php?id=ART20191607, Volume 7 Issue 10, October 2018, 12 - 17

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