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Publisher: Altai State University
Journal: Khimiia rastitel'nogo syr'ia (Chemistry of plant raw material)
Languages: Russian
Types: Article
Subjects: модифицированная кора; динамическая сорбция
This paper presents the ability of a low-cost sorbent, waste wood – fir bark (Abies sibirica Ledeb.) to remove of heavy metal from aqueous solution. The method of chemical modification of fir bark has been proposed to obtain this sorbent. Dynamic sorption patterns of Cu2+ cations (as example) from water solution by modified bark of fir were studied. The dynamic exchange capacity of modified bark reached 22,50 mg/g for Cu2+ cations at the inlet Cu2+ concentration of 50 mg/dm3 and at the minimum flow rate of 5 cm3/min. The dynamic exchange capacity decreased with increasing flow rate. The model Thomas was found to be suitable for describing the breakthrough curves and was applied to determine the sorption capacity of the column for Cu2+ cations. Comparison analysis of nonlinear least square method and linear least square method for estimating the kinetic parameters was made using the experimental data of Cu2+ cations adsorption onto modified bark of Abies sibirica L. at different flow rates. The nonlinear method was found to be more appropriate.
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