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dc.contributor.authorParadelo Núñez, Remigio
dc.contributor.authorAl-Zawahreh, Khaled
dc.contributor.authorBarral Silva, María Teresa del Carmen
dc.date.accessioned2020-11-09T07:48:50Z
dc.date.available2020-11-09T07:48:50Z
dc.date.issued2020
dc.identifier.citationParadelo, R.; Al-Zawahreh, K.; Barral, M.T. Utilization of Composts for Adsorption of Methylene Blue from Aqueous Solutions: Kinetics and Equilibrium Studies. Materials 2020, 13, 2179
dc.identifier.urihttp://hdl.handle.net/10347/23602
dc.description.abstractUtilization of composts as low-cost adsorbents is an important application in the field of environmental remediation, but these materials have not yet been extensively used for dye removal. In this work, we have studied the characteristics of adsorption of methylene blue onto two composts (a municipal solid waste compost and a pine bark compost). Kinetics and equilibrium batch experiments testing the influence of adsorbent particle size, solution pH and ionic strength were performed. Both composts have a high adsorption capacity for methylene blue, similar to other low-cost adsorbents. Kinetics of adsorption followed a pseudo-first-order model, with maximum adsorption reached after a contact time of two hours. Equilibrium adsorption followed a Langmuir model in general. Reduction of particle size only increased adsorption slightly for composted pine bark. Increase in ionic strength had no effect on adsorption by municipal solid waste compost, but increased adsorption by composted pine bark. Modification of pH between 5 and 7 did not influence adsorption in any case. Overall, the results suggest that electrostatic interaction between the cationic dye and the anionic functional groups in the composts is not the only mechanism involved in adsorption. In conclusion, the use of composts for dye removal is a likely application, in particular for those composts presenting limitations for agricultural use
dc.description.sponsorshipThis research was funded by the Spanish Ministry of Economy and Competitiveness (MINECO), through a Ramón y Cajal fellowship, grant number RYC-2016-19286
dc.language.isoeng
dc.publisherMDPI
dc.rights© 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/)
dc.rightsAtribución 4.0 Internacional
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectOrganic waste
dc.subjectWaste management
dc.subjectWaste water
dc.subjectColored compounds
dc.subjectAdsorption
dc.titleUtilization of Composts for Adsorption of Methylene Blue from Aqueous Solutions: Kinetics and Equilibrium Studies
dc.typeinfo:eu-repo/semantics/article
dc.identifier.DOI10.3390/ma13092179
dc.relation.publisherversionhttps://doi.org/10.3390/ma13092179
dc.type.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.e-issn1996-1944
dc.rights.accessrightsinfo:eu-repo/semantics/openAccess
dc.contributor.affiliationUniversidade de Santiago de Compostela. Departamento de Edafoloxía e Química Agrícola
dc.contributor.affiliationUniversidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS)
dc.description.peerreviewedSI


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© 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/)
Except where otherwise noted, this item's license is described as  © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/)





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