Competitive heavy metal adsorption on pinecone shells: Mathematical modelling of fixed-bed column and surface interaction insights.

Autor: Ben Amar M; Laboratory of Material Sciences and Environment, Faculty of Science, University of Sfax, Tunisia., Mallek M; Laboratory of Material Sciences and Environment, Faculty of Science, University of Sfax, Tunisia., Valverde A; Department of Chemical Engineering, Universitat Politècnica de Catalunya, 08028 Barcelona, Spain; Visiting Fellow, Mathematical Institute, University of Oxford, Oxford OX2 6GG, UK., Monclús H; LEQUIA (Institute of the Environment), University of Girona, C/M. Aurèlia Capmany, 69, Girona 17003, Spain., Myers TG; Centre de Recerca Matemàtica, Bellaterra 08193, Spain., Salvadó V; Department of Chemistry, Faculty of Science, University of Girona, M. Aurèlia Capmany, 69, 17003 Girona, Spain., Cabrera-Codony A; LEQUIA (Institute of the Environment), University of Girona, C/M. Aurèlia Capmany, 69, Girona 17003, Spain. Electronic address: alba.cabrera@udg.edu.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2024 Mar 20; Vol. 917, pp. 170398. Date of Electronic Publication: 2024 Jan 27.
DOI: 10.1016/j.scitotenv.2024.170398
Abstrakt: Pinecone shells are assessed as a cost-effective biosorbent for the removal of metal ions Pb(II), Cu(II), Cd(II), Ni(II), and Cr(VI) in a fixed-bed column. Influent concentration, bed height, and flowrate are studied to improve efficiency. The breakthrough data is well fitted by the Sips adsorption model, suggesting a surface complexation mechanism, with maximum adsorption capacities of 11.1 mg/g for Cu(II) and 66 mg/g for Pb(II). In multimetal solutions, the uptake sequence at breakthrough and saturation is Pb(II) > Cu(II) > Cd(II). Characterization via FTIR and XRD reveals carboxyl and hydroxyl functional groups interacting with metal ions. Ca(II) does not compete with Pb(II), Cu(II), and Cd(II) adsorption, highlighting the ability of pinecone to adsorb heavy metals via surface complexation. Its application in the treatment of industrial effluents containing Cu(II), Ni(II), and Cr(VI) is explored. The study investigates bed media regeneration via eluting adsorbed metal ions with hydrochloric acid solutions. The potential of pinecone shells as an efficient biosorbent for removing toxic metal ions from industrial wastewater is emphasized. These findings enhance our understanding of the adsorption mechanism and underscore the fixed-bed column system's applicability in real-world scenarios, addressing environmental concerns related to heavy metal contamination of industrial effluents.
Competing Interests: Declaration of competing interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Hector Monclus reports financial support was provided by Ministerio de Ciencia, Innovación y Universidades. Abel Valverde reports financial support was provided by Spanish Ministry of Universities with European Union. Timothy G. Myers reports financial support was provided by Spanish Ministry of Science Technology and Innovations. Victoria Salvador reports financial support was provided by Horizon 2020 Framework Programme. Marwa Ben Amar reports financial support was provided by University of Sfax. Maryam Mallek reports financial support was provided by University of Sfax. Alba Cabrera-Codony reports financial support was provided by Spanish Ministry of Science and Innovation. If there are other authors, they declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 University of Girona. Published by Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: