Publication
Adsorption of Sudan-IV contained in oily wastewater on lipophilic activated carbons: kinetic and isotherm modelling
| dc.contributor.author | Díaz de Tuesta, Jose Luis | |
| dc.contributor.author | Silva, Adrián | |
| dc.contributor.author | Faria, Joaquim | |
| dc.contributor.author | Gomes, Helder | |
| dc.date.accessioned | 2018-02-19T10:00:00Z | |
| dc.date.accessioned | 2020-06-22T10:18:14Z | |
| dc.date.available | 2018-01-19T10:00:00Z | |
| dc.date.available | 2020-06-22T10:18:14Z | |
| dc.date.issued | 2020 | |
| dc.description.abstract | Up to nine kinetic and fourteen isotherm adsorption models are employed to model the adsorption of Sudan IV, a lipophilic model pollutant present in a biphasic mixture of cyclohexane-water system to simulate oily wastewater. Six different modified activated carbons were used as adsorbents. The highest amount adsorbed of Sudan IV was found in the material prepared by successive treatments of the parent commercial activated carbon Norit ROX 0.8 with nitric acid and urea, followed by thermal treatment at 800 °C under continuous flow of nitrogen. Kinetic and isotherm adsorption models can be employed to simulate the process, since the effect of the presence of water in the adsorption of Sudan IV from the cyclohexane phase was found to be negligible, owing to the high lipophilic character of both adsorbent and adsorbate. All kinetic and isotherm coefficients, coupling with statistical parameters (r2, adjusted r2 and sum of squared errors), are determined by non-linear regression fitting and compared to literature data. The model of Avrami is found to be the most appropriate model to represent the adsorption of the pollutant in any of the six modified carbons tested, the highest value of the kinetic constant being 0.055 min−1. The isotherm adsorption is wellmodelled by using the general isotherm equation of Tóth and the multilayer Jovanović expression for the adsorption of Sudan-IV on that material, resulting in a high monolayer uptake capacity (qm = 193.6 mg g−1). | |
| dc.description.abstract | Up to nine kinetic and fourteen isotherm adsorption models are employed to model the adsorption of Sudan IV, a lipophilic model pollutant present in a biphasic mixture of cyclohexane-water system to simulate oily wastewater. Six different modified activated carbons were used as adsorbents. The highest amount adsorbed of Sudan IV was found in the material prepared by successive treatments of the parent commercial activated carbon Norit ROX 0.8 with nitric acid and urea, followed by thermal treatment at 800 °C under continuous flow of nitrogen. Kinetic and isotherm adsorption models can be employed to simulate the process, since the effect of the presence of water in the adsorption of Sudan IV from the cyclohexane phase was found to be negligible, owing to the high lipophilic character of both adsorbent and adsorbate. All kinetic and isotherm coefficients, coupling with statistical parameters (r2, adjusted r2 and sum of squared errors), are determined by non-linear regression fitting and compared to literature data. The model of Avrami is found to be the most appropriate model to represent the adsorption of the pollutant in any of the six modified carbons tested, the highest value of the kinetic constant being 0.055 min−1. The isotherm adsorption is wellmodelled by using the general isotherm equation of Tóth and the multilayer Jovanović expression for the adsorption of Sudan-IV on that material, resulting in a high monolayer uptake capacity (qm = 193.6 mg g−1). | |
| dc.description.sponsorship | This work is a result of Project “AIProcMat@N2020—Advanced Industrial Processes and Materials for a Sustainable Northern Region of Portugal 2020,” with the reference NORTE-01-0145-FEDER-000006, supported by Norte Portugal Regional Operational Programme (NORTE 2020), under the Portugal 2020 Partnership Agreement, through the European Regional Development Fund (ERDF); Associate Laboratory LSRE-LCM UID/EQU/50020/2019 funded by national funds through FCT/MCTES (PIDDAC); and CIMO UIDB/00690/2020 through FEDER under Program PT2020. | |
| dc.description.sponsorship | This work i s a re s u l t of Project “AIProcMat@N2020—Advanced Industrial Processes and Materials for a Sustainable Northern Region of Portugal 2020,” with the reference NORTE-01-0145-FEDER-000006, supported by Norte Portugal Regional Operational Programme (NORTE 2020), under the Portugal 2020 Partnership Agreement, through the European Regional Development Fund (ERDF); Associate Laboratory LSRE-LCM (UID/ EQU/50020/2019) funded by national funds through FCT/MCTES (PIDDAC); and CIMO (UIDB/00690/2020) through FEDER under Program PT2020. | |
| dc.description.version | info:eu-repo/semantics/publishedVersion | en_EN |
| dc.identifier.citation | Diaz de Tuesta, Jose L.; Silva, Adrián M.T.; Faria, Joaquim L.; Gomes, Helder T. (2020). Adsorption of Sudan-IV contained in oily wastewater on lipophilic activated carbons: kinetic and isotherm modelling. Environmental Science and Pollution Research. ISSN 0944-1344. 27, p. 20770-20785 | en_EN |
| dc.identifier.doi | 10.1007/s11356-020-08473-1 | en_EN |
| dc.identifier.issn | 0944-1344 | |
| dc.identifier.uri | http://hdl.handle.net/10198/6562 | |
| dc.language.iso | eng | |
| dc.peerreviewed | yes | en_EN |
| dc.subject | Activated carbon | en_EN |
| dc.subject | Denitrification | en_EN |
| dc.subject | Lipophilic pollutant | en_EN |
| dc.subject | Modelling | en_EN |
| dc.subject | Oil purification | en_EN |
| dc.subject | Triphasic adsorption | en_EN |
| dc.title | Adsorption of Sudan-IV contained in oily wastewater on lipophilic activated carbons: kinetic and isotherm modelling | en_EN |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| person.familyName | Díaz de Tuesta | |
| person.familyName | Gomes | |
| person.givenName | Jose Luis | |
| person.givenName | Helder | |
| person.identifier.ciencia-id | 7A1F-022B-7DBF | |
| person.identifier.ciencia-id | 6218-1E19-13EE | |
| person.identifier.orcid | 0000-0003-2408-087X | |
| person.identifier.orcid | 0000-0001-6898-2408 | |
| person.identifier.rid | D-9785-2017 | |
| person.identifier.scopus-author-id | 55755821600 | |
| rcaap.rights | openAccess | en_EN |
| rcaap.type | article | en_EN |
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