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On the valorization of olive oil pomace: a sustainable approach for methylene blue removal from aqueous media

2024-10-30Journal article Open Access
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dc.contributor.authorsaoudi hassani, el mokhtar
dc.contributor.authorDuarte, Hugo
dc.contributor.authorBrás, João
dc.contributor.authorTaleb, Abdeslam
dc.contributor.authorTaleb, Mustapha
dc.contributor.authorRais, Zakia
dc.contributor.authorEivazi, Alireza
dc.contributor.authorNorgren, Magnus
dc.contributor.authorRomano, Anabela
dc.contributor.authorMedronho, Bruno
dc.date.accessioned2025-01-13T11:19:17Z
dc.date.available2025-01-13T11:19:17Z
dc.date.issued2024-10-30
dc.description.abstractCurrently, industrial water pollution represents a significant global challenge, with the potential to adversely impact human health and the integrity of ecosystems. The continuous increase in global consumption has resulted in an exponential rise in the use of dyes, which have become one of the major water pollutants, causing significant environmental impacts. In order to address these concerns, a number of wastewater treatment methods have been developed, with a particular focus on physicochemical approaches, such as adsorption. The objective of this study is to investigate the potential of a bio-based material derived from olive oil pomace (OOP) as an environmentally friendly bio-adsorbent for the removal of methylene blue (MB), a cationic dye commonly found in textile effluents. The biobased material was initially characterized by determining the point of zero charge (pHpzc) and using scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR). Subsequently, a comprehensive analysis was conducted, evaluating the impact of specific physicochemical parameters on MB adsorption, which included a thorough examination of the kinetic and thermodynamic aspects. The adsorption process was characterized using Langmuir, Freundlich, Brunauer-Emmett-Teller (BET), and Dubinin Radushkevich (D-R) isotherms. The results suggest that the equilibrium of adsorption is achieved within ca. 200 min, following pseudo-second-order kinetics. The optimal conditions, including adsorbent mass, temperature, bulk pH, and dye concentration, yielded a maximum adsorption capacity of ca. 93% (i.e., 428 mg g−1) for a pomace concentration of 450 mg L−1. The results suggest a monolayer adsorption process with preferential electrostatic interactions between the dye and the pomace adsorbent. This is supported by the application of Langmuir, BET, Freundlich, and D-R isotherm models. The thermodynamic analysis indicates that the adsorption process is spontaneous and exothermic. This work presents a sustainable solution for mitigating MB contamination in wastewater streams while simultaneously valorizing OOP, an agricultural by-product that presents risks to human health and the environment. In conclusion, this approach offers an innovative ecological alternative to synthetic adsorbents.eng
dc.description.sponsorshipCEECIND/01014/2018/CP1540/CT0002
dc.identifier.doi10.3390/polym16213055
dc.identifier.issn2073-4360
dc.identifier.urihttp://hdl.handle.net/10400.1/26612
dc.language.isoeng
dc.peerreviewedyes
dc.publisherMDPI
dc.relationMediterranean Institute for Agriculture, Environment and Development
dc.relationCHANGE - Global Change and Sustainability Institute
dc.relation.ispartofPolymers
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectOlive oil pomace
dc.subjectMethylene blue
dc.subjectWastewater treatment
dc.subjectAbsorption kinetics
dc.subjectBio-based adsorbent
dc.titleOn the valorization of olive oil pomace: a sustainable approach for methylene blue removal from aqueous mediaeng
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleMediterranean Institute for Agriculture, Environment and Development
oaire.awardTitleCHANGE - Global Change and Sustainability Institute
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F05183%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/LA%2FP%2F0121%2F2020/PT
oaire.citation.issue21
oaire.citation.startPage3055
oaire.citation.titlePolymer Journal
oaire.citation.volume16
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNamesaoudi hassani
person.familyNameDuarte
person.familyNameBrás
person.familyNameRomano
person.familyNameMedronho
person.givenNameel mokhtar
person.givenNameHugo
person.givenNameJoão
person.givenNameAnabela
person.givenNameBruno
person.identifier.ciencia-id8416-555E-B56F
person.identifier.ciencia-id8A18-7E9A-3B0E
person.identifier.ciencia-id6918-9AB3-8D22
person.identifier.orcid0000-0002-7879-7385
person.identifier.orcid0000-0001-6461-3541
person.identifier.orcid0000-0002-6843-6500
person.identifier.orcid0000-0002-7204-7428
person.identifier.orcid0000-0003-0972-1739
person.identifier.ridP-5927-2014
person.identifier.scopus-author-id56249997600
person.identifier.scopus-author-id9940656700
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
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