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• W1970338045 abstract "The adsorption of heavy metal cations Pb(II), Cr(III), Cu(II), Cd(II) and Ni(II) from aqueous solution by a mine tailing which mainly contains muscovite was investigated. The property of the mineral was investigated by using SEM, FT-IR, XRD and BET analysis. pHpzc was measured by an titration technique to give a value of 5.4 ± 0.1. Kinetics experiments indicated that the processes can be simulated by pseudo-second-order model. Total adsorption amounts of the heavy metal increased, while the adsorption density decreased when the solid-to-liquid ratio (S/L) increased. Grain size did not affect the adsorption capacity significantly. The resulting isotherms can be described by Frendlich relationship. And the maximum adsorption capacity (molar basis) followed the order of Cr(III) > Pb(II) > Cu(II) > Ni(II) > Cd(II). Thermodynamic analysis showed that the adsorption processed were endothermic and may be chemical in nature with positive ΔH0. The positive ΔS0 suggested that dissociative processed were involved. Small positive ΔG0 suggested that the adsorption processes required a small amount of energy. Adsorption processes were slightly affected by electrolyte ion concentration but strongly dependent on pH value. The most possible mechanism of the adsorption processes involve the inner-sphere-complexions by the aluminol or silanol groups on the surface of the mineral." @default.
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• W1970338045 date "2009-09-01" @default.
• W1970338045 modified "2023-10-01" @default.
• W1970338045 title "Adsorption of Pb(II), Cr(III), Cu(II), Cd(II) and Ni(II) onto a vanadium mine tailing from aqueous solution" @default.
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• W1970338045 doi "https://doi.org/10.1016/j.jhazmat.2009.04.020" @default.
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