Adsorption of vanadium (V) ions from the aqueous solutions on different biomass-derived biochars

• Published in: Journal of environmental management 2022-07, Vol.313, p.114958-114958, Article 114958
• Main Authors: Kończyk, Joanna, Kluziak, Karolina, Kołodyńska, Dorota
• Format: Article
• Language: English
• Subjects: Adsorption; Biochar; Vanadium; Water treatment
• ISSN: 0301-4797; 1095-8630
• DOI: 10.1016/j.jenvman.2022.114958

The paper presents the results of the studies on the vanadium (V) ions removal from the aqueous solutions in the adsorption process on biochars from different biomass types (cow manure BC1, wet distiller grains BC2, spent mushroom substrates BC3). The adsorbents were characterized by means of the SEM-EDS, FTIR, XRD and XPS techniques. The influence of adsorbent type and basic process parameters, such as pH and metal ion concentration in aqueous phase, adsorbent dose and time of contact of phases on the efficiency of V(V) was determined. Based on the obtained results, the mechanism and kinetics of the adsorption processes occurring on the biochar originating from the wet distiller grains as adsorbents with the greatest affinity for the V(V) ions were characterized, using isotherm models of Langmuir, Freundlich, Temkin and Dubinin-Radushkevich and pseudo-first-order, pseudo-second-order as well as intraparticle diffusion kinetic models. Under the constant process conditions (pH = 3.0; m = 0.5 g; c0 = 50 mg/L) the order of V(V) ions removal from aqueous solutions was as follows: BC2 > BC1 = BC3. The biochar BC2 exhibited the maximum sorption capacity of 1.61 mg V(V)/g. The experimental kinetic data show the adsorption course according to the pseudo-second order model. [Display omitted] •Application of novel biochars for V(V) adsorption from aqueous solutions.•Physicochemical characterization of three biochars derived from different biomass.•Maximum adsorptivity (1.61 mg V(V)/g) of biochar originated from wet distiller grains.•Good correlation between experimental data and pseudo-second-order model.•Complex mechanism of V(V) ions removal confirmed by isotherms analysis.