Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/73091
Registo completo
Campo DC | Valor | Idioma |
---|---|---|
dc.contributor.author | Bencheqroun, Zineb | por |
dc.contributor.author | El Mrabet, Imane | por |
dc.contributor.author | Kachabi, Mohammed | por |
dc.contributor.author | Nawdali, Mostafa | por |
dc.contributor.author | Valdes, Hector | por |
dc.contributor.author | Neves, Isabel C. | por |
dc.contributor.author | Zaitan, Hicham | por |
dc.date.accessioned | 2021-05-29T15:45:09Z | - |
dc.date.issued | 2019 | - |
dc.identifier.issn | 1944-3994 | por |
dc.identifier.uri | https://hdl.handle.net/1822/73091 | - |
dc.description.abstract | This study aims to evaluate the technical feasibility of applying a low-cost alternative natural bioadsorbent obtained from the cone of the Moroccan cypress Cupressus sempervirens to remove dyes from contaminated waters. Methylene Blue (MB) and Congo Red (CR) dyes are used to represent basic and acid compounds present in wastewater of textile industries. The cone of this medium-sized coniferous evergreen tree was obtained from the Fez area and was characterised by different physical-chemical methods, including nitrogen adsorption-desorption isotherms, Fourier transform infrared spectroscopy, scanning electron microscopy, Boehm titration method and the pH of the point of zero charge (pH(pzc)). Additionally, the influence of operating conditions such as contact time, initial dye concentration, binary mixture of dye solutions, bioadsorbent dosages and solution pH were evaluated. Experimental results reveal that the adsorption processes take place very rapidly, reaching equilibrium at 30 and 45 min for MB and CR, respectively. Maximum adsorption capacities result to be pH dependents. Hence, MB adsorption is favoured under basic pH conditions, while CR is favoured at acidic pH. A pseudo-second-order kinetic model provides the best fit of the experimental data of MB and CR adsorption onto the biomaterial. Adsorption isotherm data are well represented by Langmuir, Freundlich and Dubinin-Radushkevich models. Langmuir model gives the best fit with a maximum monolayer sorption capacity of 144 and 25.02 mg g(-1) for MB and CR, respectively. Experimental results indicate that the cone of Cupressus sempervirens could be used as a potential, low-cost bioadsorbent for the elimination of dyes from contaminated waters. | por |
dc.description.sponsorship | The authors are grateful for the financial support provided by the Moroccan Environment Ministry (Project DE-LIX). They would also like to acknowledge the University of Minho for co-financing this research as part of the Erasmus mobility of PhD student Z. Bencheqroun (Erasmus Scholarship) by the projects BioTecNorte (operation NORTE-01-0145-FEDER-000004), PTDC/AAGTEC/5269/2014 and Centre of Chemistry (UID/QUI/00686/2013 and UID/QUI/0686/2016). | por |
dc.language.iso | eng | por |
dc.publisher | Desalination Publications | por |
dc.relation | PTDC/AAGTEC/5269/2014 | por |
dc.relation | UID/QUI/00686/2013 | por |
dc.relation | UID/QUI/0686/2016 | por |
dc.rights | restrictedAccess | por |
dc.subject | Adsorption | por |
dc.subject | Low-cost natural bioadsorbent | por |
dc.subject | Textile dyes | por |
dc.title | Removal of basic and acid dyes from aqueous solutions using cone powder from Moroccan cypress Cupressus sempervirens as a natural adsorbent | por |
dc.type | article | - |
dc.peerreviewed | yes | por |
oaire.citationStartPage | 387 | por |
oaire.citationEndPage | 398 | por |
oaire.citationVolume | 166 | por |
dc.date.updated | 2021-05-27T10:01:41Z | - |
dc.identifier.doi | 10.5004/dwt.2019.24514 | por |
dc.date.embargo | 10000-01-01 | - |
dc.subject.fos | Ciências Naturais::Ciências Químicas | por |
dc.subject.wos | Science & Technology | - |
sdum.export.identifier | 10901 | - |
sdum.journal | Desalination and Water Treatment | por |
Aparece nas coleções: | CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series CDQuim - Artigos (Papers) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
---|---|---|---|---|
Desalination and Water Treatment - 2019.pdf Acesso restrito! | 1,6 MB | Adobe PDF | Ver/Abrir |