Moringa oleifera seed husks for methylene blue dye adsorption: kinetic, equilibrium, and thermodynamic analyses

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dc.contributor.authorLopes, Carolina Almeida [UNESP]
dc.contributor.authorRoledo, Cely [UNESP]
dc.contributor.authorDos Reis, Adriano Gonçalves [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.date.accessioned2022-04-28T19:52:40Z
dc.date.available2022-04-28T19:52:40Z
dc.date.issued2022-01-20
dc.description.abstractMole·ifera se·ed hu·sks (H-M·O) w· ere u·sed as adsorbent for the removal of methylene blue (MB) dye from an aqueous solution. The ads ·orbent was char·acterized by SE·M, ED·X, X·RD, F·TIR, B·ET, and p·HPZC. To evaluate adsorption capacity, the influences of p ·H, kinetics, isotherms, and thermodynamic prop·erties were anal·yzed. Characteri·zation tech·niques indic·ated that H-MO has het·erogeneous morp·hological charac·teristics with a spe·cific sur·face a·rea of 3.24 m2 g-1, mai·nly comp·osed of ce·llulose distr·ibuted in an amor·phous stru·cture. MB adsorption was favorable at pH values higher than pHPZC of 6.6, using an adsorbent dosage of 1.0 g L-1. Equilibrium was achieved in the first 240 min, and the pseudo-second-order model was suitable for describing the kinetic data. Freu ·ndlich was the mo·st adeq·uate model for descri·bing the isoth·erm cur·ves, pred·icting a max·imum adsor·ption capa·city of 122.7 mg g-1 at 24°C, hig·her tha·n oth·er natu·ral ad·sorbents. The ads·orption proc·ess w·as spo·ntaneous and exoth·ermic, indic·ating that lo·wer temper·atures fav·or the ad· sorption and th·at it is cont·rolled by p·hysical fo·rces. The da·ta presen·ted indic·ate the M·B has t·he pot·ential to be succ· essfully trea·ted by the eco-fr·iendly and l·ow-cost ads·orbent M. oleif·era seed h·usks.en
dc.description.affiliationInstituto de Ciência e Tecnologia Departamento de Engenharia Ambiental Universidade Estadual Paulista (UNESP), Estrada Doutor Altino Bondensan, n° 500, SP
dc.description.affiliationUnespInstituto de Ciência e Tecnologia Departamento de Engenharia Ambiental Universidade Estadual Paulista (UNESP), Estrada Doutor Altino Bondensan, n° 500, SP
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipIdCNPq: PIBIC 123798/2020-5
dc.identifierhttp://dx.doi.org/10.4136/ambi-agua.2812
dc.identifier.citationRevista Ambiente e Agua, v. 17, n. 1, 2022.
dc.identifier.doi10.4136/ambi-agua.2812
dc.identifier.issn1980-993X
dc.identifier.scopus2-s2.0-85127058782
dc.identifier.urihttp://hdl.handle.net/11449/223714
dc.language.isoeng
dc.relation.ispartofRevista Ambiente e Agua
dc.sourceScopus
dc.subjectagricultural wastes
dc.subjectlow-cost adsorbent
dc.subjectphysisorption
dc.titleMoringa oleifera seed husks for methylene blue dye adsorption: kinetic, equilibrium, and thermodynamic analysesen
dc.titleCascas da semente de Moringa oleifera para adsorção do corante azul de metileno: análise cinética, de equilíbrio e termodinâmicapt
dc.typeArtigo

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