Potentiality of lignin from the Kraft pulping process for removal of trace nickel from wastewater: Effect of demineralisation

M. Betancur, P. R. Bonelli, J. A. Velásquez, A. L. Cukierman

    Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

    58 Citas (Scopus)

    Resumen

    An industrial raw Kraft lignin was investigated to ascertain its potential use for removal of trace Ni(II) ion from wastewater by using dilute solutions (0.34-1.7 mM) as models. The effect of demineralisation on its metal sorption ability was examined by employing acid pre-treated samples. Under fixed pre-established equilibrium conditions, the raw lignin exhibited a lower effectiveness than the demineralised one, with the latter attaining an almost complete removal of Ni(II) ions. For both lignins, sorption kinetics was properly described by a pseudo-second order rate model. Equilibrium isotherms were also determined and adequately represented by conventional two-parameter models. The higher nickel sorption capacity for the demineralised lignin compared to the raw sample was consistent with enhancements in the negative magnitude of zeta potential, sodium sorption capacity, and content of phenolic hydroxyl groups occasioned by the acid pre-treatment. Accordingly, demineralisation appears as a readily convenient strategy to improve the behaviour of industrial Kraft lignin for potential use as a biosorbent of trace nickel from polluted water.

    Idioma originalInglés
    Páginas (desde-hasta)1130-1137
    Número de páginas8
    PublicaciónBioresource Technology
    Volumen100
    N.º3
    DOI
    EstadoPublicada - feb. 2009

    Huella

    Profundice en los temas de investigación de 'Potentiality of lignin from the Kraft pulping process for removal of trace nickel from wastewater: Effect of demineralisation'. En conjunto forman una huella única.

    Citar esto