University of Oulu

J F Cruz et al 2019 J. Phys.: Conf. Ser. 1173 012007. doi: 10.1088/1742-6596/1173/1/012007

Production and characterization of activated carbon based on coffee husk residue for phosphate removal in aqueous solutions

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Author: Cruz, J. F.1; Valdiviezo, G.2; Carrión, L.3;
Organizations: 1Departament of Chemistry, Universidad Nacional de Piura, Campus Universitario s/n, Urb. Miraflores, Piura, Peru
2Master Programin Environmental Engineering and Industrial Safety, Universidad Nacional de Piura, Campus Universitario s/n, Urb. Miraflores, Piura, Peru
3Environmental and Chemical Engineering, University of Oulu, P.O.Box 4300, FI-90014 University of Oulu, Finland
4Department of Forestry Engineering and Environmental Management, Universidad Nacional de Tumbes, Av. Universitaria s/n, Campus Universitario – Pampa Grande, Tumbes, Peru
5Faculty of Sciences, Universidad Nacional de Ingeniería, Av. Túpac Amaru 210, Lima 25, Peru
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 1.2 MB)
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Language: English
Published: IOP Publishing, 2019
Publish Date: 2019-10-18


ZnCl²-activated carbon was prepared using coffee husk for phosphate adsorption in aqueous solutions. Textural, morphological and structural analyses were carried out to characterize the produced materials. XRD detected the presence of ZnO in the activated carbon structure, and the measured nitrogen isotherm showed a micro-macroporous structure with 989 m²/g of specific surface area for this material. Phosphate equilibrium and kinetic experiments were conducted. Equilibrium data fit best to the Dubinin-Radushkevich model (r² ≥0.96), with maximum adsorption capacities of 59.38–63.87 mg P/g in the pH range between 5 and 9. Intraparticle diffusion was the rate-limiting mechanism of the adsorption.

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Series: Journal of physics. Conference series
ISSN: 1742-6588
ISSN-E: 1742-6596
ISSN-L: 1742-6588
Volume: 1173
Article number: 012007
DOI: 10.1088/1742-6596/1173/1/012007
Host publication: Peruvian Workshop on Solar Energy 10–11 May 2018, Lima, Peru
Type of Publication: A4 Article in conference proceedings
Field of Science: 114 Physical sciences
218 Environmental engineering
Funding: The Academy of Finland is acknowledged for the research funding for the AdMatU project (DNo: 269631) from the development funds. The National University of Tumbes (CANON Project –R.N°0169-2017/UNT-R) and the Peruvian National Council for Science and Technology (CONCYTEC) (Contract N° 024-2016-FONDECYT) are gratefully acknowledged for their support.
Copyright information: Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Published under licence by IOP Publishing Ltd.