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Open AccessArticle

Experimental and Numerical Study of Biochar Fixed Bed Column for the Adsorption of Arsenic from Aqueous Solutions

1
Faculty of Civil and Industrial Engineering, Department of Civil, Constructional and Environmental Engineering (DICEA), Sapienza University of Rome, Via Eudossiana 18, 00184 Rome, Italy
2
National Centre of Waste and Circular Economy, Italian Institute for Environmental Protection and Research (ISPRA), Via Vitaliano Brancati 48, 00144 Rome, Italy
3
Department Hydraulics and Environmental Engineering, Department of Civil Engineering and Architecture (DICAr), University of Pavia, Corso Strada Nuova 65, 27100 Pavia, Italy
4
Department of Electric Electronic and Computer Engineering (DIEEI), University of Catania, Viale Andrea Doria 6, 95125 Catania, Italy
5
Resource Valorization Lab, Casaccia Research Centre, Department for Sustainability, Italian National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA), Via Anguillarese 301, 00123 Rome, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Laura Bulgariu
Water 2021, 13(7), 915; https://doi.org/10.3390/w13070915
Received: 24 February 2021 / Revised: 18 March 2021 / Accepted: 24 March 2021 / Published: 27 March 2021
Two laboratory tests were carried out to verify the suitability of an Italian commercial biochar as an adsorbing material. The chosen contaminant, considered dissolved in groundwater, was As. The circular economic concept demands the use of such waste material. Its use has been studied in recent years on several contaminants. The possibility of using an efficient material at low cost could help the use of low-impact technologies like permeable reactive barriers (PRBs). A numerical model was used to derive the kinetic constant for two of the most used isotherms. The results are aligned with others derived from the literature, but they also indicate that the use of a large amount of biochar does not improve the efficiency of the removal. The particular origin of the biochar, together with its grain size, causes a decrease in contact time required for the adsorption. Furthermore, it is possible that a strong local decrease in the hydraulic conductibility does not allow for a correct dispersion of the flow, thereby limiting its efficiency. View Full-Text
Keywords: arsenic; biochar; breakthrough curve analysis; continuous-flow systems; contaminated groundwater; numerical model arsenic; biochar; breakthrough curve analysis; continuous-flow systems; contaminated groundwater; numerical model
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MDPI and ACS Style

Boni, M.R.; Marzeddu, S.; Tatti, F.; Raboni, M.; Mancini, G.; Luciano, A.; Viotti, P. Experimental and Numerical Study of Biochar Fixed Bed Column for the Adsorption of Arsenic from Aqueous Solutions. Water 2021, 13, 915. https://doi.org/10.3390/w13070915

AMA Style

Boni MR, Marzeddu S, Tatti F, Raboni M, Mancini G, Luciano A, Viotti P. Experimental and Numerical Study of Biochar Fixed Bed Column for the Adsorption of Arsenic from Aqueous Solutions. Water. 2021; 13(7):915. https://doi.org/10.3390/w13070915

Chicago/Turabian Style

Boni, Maria R.; Marzeddu, Simone; Tatti, Fabio; Raboni, Massimo; Mancini, Giuseppe; Luciano, Antonella; Viotti, Paolo. 2021. "Experimental and Numerical Study of Biochar Fixed Bed Column for the Adsorption of Arsenic from Aqueous Solutions" Water 13, no. 7: 915. https://doi.org/10.3390/w13070915

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