Adsorption of Ni(SO4) on Malaysian rubber-wood ash

Bhaskar Sengupta, Shameem Hasan, M.A. Hashim

    Research output: Contribution to journalArticle

    28 Citations (Scopus)


    The possible use of wood ash as an adsorbent of nickel sulphate from dilute solutions and the effect of operating parameters were investigated in this study. The rate constants of adsorption were determined at different concentrations and temperatures. The applicability of the first-order reversible equation and an empirical kinetic model were tested to understand the kinetics of nickel sulphate removal at different concentrations. Pore diffusion was found as the rate-controlling step. The Langmuir and Freundlich isotherms were applied to find out the adsorption parameters. The activation energy of adsorption was -11.54 kJ mol-1. The value of the enthalpy change was ?H=-10.35 kcal mol-1.
    Original languageEnglish
    Pages (from-to)153-158
    Number of pages6
    JournalBioresource Technology
    Issue number2
    Publication statusPublished - Apr 2000

    ASJC Scopus subject areas

    • Agronomy and Crop Science
    • Food Science
    • Process Chemistry and Technology
    • Applied Microbiology and Biotechnology

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