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Kinetic and Isotherm Studies of Ni 2+ and Pb 2+ Adsorption from Synthetic Wastewater Using Eucalyptus camdulensis —Derived Biochar

Author

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  • Muhammad Shafiq

    (Alamoudi Water Research Chair, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia)

  • Abdulrahman Ali Alazba

    (Alamoudi Water Research Chair, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia
    Agricultural Engineering Department, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia)

  • Muhammad Tahir Amin

    (Alamoudi Water Research Chair, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia
    Department of Environmental Sciences, Abbottabad Campus, COMSATS University, Islamabad, Abbottabad 22060, Pakistan)

Abstract

The production of biosorbents by waste biomass has attracted considerable attention due to the low cost and abundance of the raw materials. Here biochar produced from Eucalyptus camdulensis sawdust ( EU -biochar) via pyrolysis at 600 °C was used as a potential biosorbent for Ni 2+ and Pb 2+ metal ions from wastewater. Characterization experiments indicated the formation of C- and O-bearing functional groups on the EU -biochar surface, while shifts and changes in the shape of C–H bands suggested the adsorption of Ni 2+ and Pb 2+ onto EU -biochar by interacting with surface carboxylic groups. Pb 2+ was adsorbed more quickly than Ni 2+ , indicating a faster and stronger interaction of Pb 2+ with EU -biochar compared to Ni 2+ . As the initial concentrations of both metal ions increased, the percentage removal decreased, whereas increasing the EU -biochar dose improved the percentage removal but impaired the adsorption capacity for Ni 2+ and Pb 2+ . The adsorption capacity could only be improved without affecting the percentage removal of both ions by increasing the pH of the metal solutions. The sorption efficiency of EU -biochar and the removal mechanism of Ni 2+ and Pb 2+ were further explored using non-linear and linear forms of kinetic and isotherm models.

Suggested Citation

  • Muhammad Shafiq & Abdulrahman Ali Alazba & Muhammad Tahir Amin, 2021. "Kinetic and Isotherm Studies of Ni 2+ and Pb 2+ Adsorption from Synthetic Wastewater Using Eucalyptus camdulensis —Derived Biochar," Sustainability, MDPI, vol. 13(7), pages 1-16, March.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:7:p:3785-:d:526170
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    References listed on IDEAS

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    1. Ozcan Saritas & Liliana N. Proskuryakova & E. Kyzyngasheva, 2015. "Water Resources – an Analysis of Trends, Weak Siglans and Wild Cards with Implications for Russia," HSE Working papers WP BRP 35/STI/2015, National Research University Higher School of Economics.
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