What is it about?

Activated carbon was prepared from Graphite and was further modified by nitric acid and Tetraethylenepentamine (TEPA), respectively. The obtained adsorbents were used to remove Ni(II) ions from its aqueous solution. The effects of several operating parameters such as contact time, initial Ni(II) ion concentration, temperature, pH, and adsorbent dosage were studied to obtain the optimum conditions of the batch adsorption process. The adsorption capacity increases with increase in pH until it reaches a Maximum value of 22.02 and 51.95mg/g at pH 5 and 6 for GAC and GACA, respectively. The results show that the Langmuir and D-R isotherms models describe the adsorption process better than Freundlich model. A maximum removal efficiency of Ni(II) ions was obtained at an adsorbent dose of 8mg/mL to be 73.6% and 85.3% for GAC and GACA, respectively. The overall above results show that the pseudo-second-order, Bangham, and intraparticle diffusion models describe the adsorption process better than the other studied models.

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Why is it important?

Based on our results, we can conclude that it is possible to use GAC and GACA for removing Ni(II) effectively from groundwater

Perspectives

Based on our results, we can conclude that it is possible to use GAC and GACA for removing Ni(II) effectively from groundwater

Dr Mahmoud Osman Abd El-Magied
Nuclear Materials Authority

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This page is a summary of: Removal of nickel (II) ions from aqueous solutions using modified activated carbon: A kinetic and equilibrium study, Journal of Dispersion Science and Technology, November 2017, Taylor & Francis,
DOI: 10.1080/01932691.2017.1402337.
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