Material Performance of Nickel Ions Adsorption by Larix Sibirica Needles

Abstract

Adsorption of ions of nickel on alternative sorption material - needles of Siberian larch (Larix sibirica) is investigated at temperatures of 20, 30 and 40 0C. The maximum sorption capacities of needles of Larix sibirica in relation to ions of nickel (II) at temperatures of 20 are determined °C, 30° C, 40° C which made 0,80 mmol/g (47,2 mg/g), 0,87 mmol/g (51,3 mg/g) and 0,92 mmol/g (54,3 mg/g) respectively. Isotherms of adsorption are received and shortchanged with use of models of Langmuir, Friendlich, Temkin and Dubinin-Radushkevich. It is defined that process of adsorption of ions of Ni2+ at a temperature of 20the ° C is best of all described by Friendlich's model (R2 = 0,983), and at temperatures of 30° C and 40° C - the Langmuir model (R2 = 0,995 and 0,996 respectively). By the carried-out calculations it is defined that process of adsorption of ions of Ni2+ needles of Larix sibirica treat processes of physical adsorption as values of energy of adsorption have size less than 8 kJ/mol, and values of energy of Gibbs demonstrate spontaneous course of physical adsorption. Processing of kinetic dependences of processes of adsorption of ions of nickel (II) Larix sibirica needles at three temperatures within diffusive model defined the limiting stages of processes - the mixed diffusion.

Nickel (ii) Ion adsorption by native and treated pea pods

“…The equations of adsorption processes were derived from linearization of the adsorption isotherms in coordinates 1/А = f(1/Ce), logА = f(logCe), lnА = f((ln(Cs/Ce))2) and А = f(lnCe) within the framework of four two-parameter sorption models: Langmuir, Freundlich, Dubinin-Radushkevich and Tyomkin, respectively, with approximation coefficients R2 (Table 2). The processes of nickel (II) ions adsorption by both native and treated PPS are best described by the Freundlich model, i.e., there are active centers with a larger sorption capacity on the surface of the sorption material [20].…”

Adsorption of Zinc ions by native and modified acacia bark (Acacia auriculiformis)

“…This technology is intensively developing worldwide. Of particular interest are such components of tree biomass as foliage [7][8][9][10], needles [11,12] and bark [13,14] due to the large amount of renewable biomass, high efficiency, availability, and other advantages.…”