Cadmium Removal by Adsorption on Biochars Derived from Wood Industry and Craft Beer Production Wastes
Simón, Daiana (Universidad Nacional de Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales)
Palet i Ballús, Cristina (Universitat Autònoma de Barcelona. Departament de Química)
Cristóbal, Adrián (Universidad Nacional de Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales)

Date:	2024
Abstract:	Cadmium pollution is a serious environmental issue that has an impact on both the ecosystem and human health. As a result, its removal from water is essential. Agro-industrial wastes are suggested as a sustainable adsorbent option, as they are among the most readily available renewable sources worldwide. Biochar is a carbonized biomass that has been shown to be a viable and novel adsorbent. This article compares the results of cadmium adsorption on biochars derived from wood industry and craft beer production wastes. Biochars were characterized before and after adsorption. Batch adsorption results of 0. 18 mmol/L Cd(II) concentration solutions indicated adsorption percentages (A%) of 99. 7% and 92. 2% for sawdust biochar and barley biochar, respectively. For this cadmium concentration, the sawdust biochar presented an adsorption capacity (q) of 0. 0172 mmol/L, while the barley biochar presented a value of 0. 0159 mmol/L. The influence of initial Cd(II) concentration on single and multimetal solutions was studied, and a decrease in Cd(II) adsorption on sawdust biochar was observed in the presence of Ni(II) and Zn(II). The Freundlich isotherm model was found to be the best fit to the data for Cd(II) adsorption isotherms on both biochars. According to the results of this article, sawdust biochar has the best performance as an adsorbent and can be safely disposed of in building bricks at the end of its useful life.
Grants:	Ministerio de Economía y Competitividad AGL2015-70393-R European Commission 645024
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Barley waste-derived biochar ; Sawdust waste-derived biochar; ; Cadmium adsorption ; Multimetal solution ; Circular economy ; Spent adsorbents
Published in:	Water, Vol. 16, Issue 13 (July 2024) , art. 1905, ISSN 2073-4441

DOI: 10.3390/w16131905

17 p, 2.3 MB

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