Activated Graphene Oxide-Calcium Alginate Beads for Adsorption of Methylene Blue and Pharmaceuticals
<div><p>The remarkable adsorption capacity of graphene-derived materials has prompted their examination in composite materials suitable for deployment in treatment of contaminated waters. In this study, crosslinked calcium alginate–graphene oxide beads were prepared and activated by expo...
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| المؤلف الرئيسي: | |
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| مؤلفون آخرون: | , , , , , , , , |
| منشور في: |
2021
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| الموضوعات: | |
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| _version_ | 1864513516139970560 |
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| author | Burcu Gunes (18527739) |
| author2 | Yannick Jaquet (18527742) Laura Sánchez (471954) Rebecca Pumarino (18527745) Declan McGlade (18527748) Brid Quilty (1976071) Anne Morrissey (292738) Zahra Gholamvand (1423744) Kieran Nolan (2047333) Jenny Lawler (16931817) |
| author2_role | author author author author author author author author author |
| author_facet | Burcu Gunes (18527739) Yannick Jaquet (18527742) Laura Sánchez (471954) Rebecca Pumarino (18527745) Declan McGlade (18527748) Brid Quilty (1976071) Anne Morrissey (292738) Zahra Gholamvand (1423744) Kieran Nolan (2047333) Jenny Lawler (16931817) |
| author_role | author |
| dc.creator.none.fl_str_mv | Burcu Gunes (18527739) Yannick Jaquet (18527742) Laura Sánchez (471954) Rebecca Pumarino (18527745) Declan McGlade (18527748) Brid Quilty (1976071) Anne Morrissey (292738) Zahra Gholamvand (1423744) Kieran Nolan (2047333) Jenny Lawler (16931817) |
| dc.date.none.fl_str_mv | 2021-10-23T03:00:00Z |
| dc.identifier.none.fl_str_mv | 10.3390/ma14216343 |
| dc.relation.none.fl_str_mv | https://figshare.com/articles/journal_contribution/Activated_Graphene_Oxide-Calcium_Alginate_Beads_for_Adsorption_of_Methylene_Blue_and_Pharmaceuticals/25780980 |
| dc.rights.none.fl_str_mv | CC BY 4.0 info:eu-repo/semantics/openAccess |
| dc.subject.none.fl_str_mv | Engineering Environmental engineering Environmental sciences Environmental management adsorption graphene oxide methylene blue pharmaceuticals kinetics isotherms and thermodynamics |
| dc.title.none.fl_str_mv | Activated Graphene Oxide-Calcium Alginate Beads for Adsorption of Methylene Blue and Pharmaceuticals |
| dc.type.none.fl_str_mv | Text Journal contribution info:eu-repo/semantics/publishedVersion text contribution to journal |
| description | <div><p>The remarkable adsorption capacity of graphene-derived materials has prompted their examination in composite materials suitable for deployment in treatment of contaminated waters. In this study, crosslinked calcium alginate–graphene oxide beads were prepared and activated by exposure to pH 4 by using 0.1M HCl. The activated beads were investigated as novel adsorbents for the removal of organic pollutants (methylene blue dye and the pharmaceuticals famotidine and diclofenac) with a range of physicochemical properties. The effects of initial pollutant concentration, temperature, pH, and adsorbent dose were investigated, and kinetic models were examined for fit to the data. The maximum adsorption capacities qmax obtained were 1334, 35.50 and 36.35 mg g−1 for the uptake of methylene blue, famotidine and diclofenac, respectively. The equilibrium adsorption had an alignment with Langmuir isotherms, while the kinetics were most accurately modelled using pseudo- first-order and second order models according to the regression analysis. Thermodynamic parameters such as ΔG°, ΔH° and ΔS° were calculated and the adsorption process was determined to be exothermic and spontaneous.</p><p> </p></div><h2>Other Information</h2> <p> Published in: Materials<br> License: <a href="https://creativecommons.org/licenses/by/4.0/" target="_blank">https://creativecommons.org/licenses/by/4.0/</a><br>See article on publisher's website: <a href="https://dx.doi.org/10.3390/ma14216343" target="_blank">https://dx.doi.org/10.3390/ma14216343</a></p> |
| eu_rights_str_mv | openAccess |
| id | Manara2_0d712c29db90b9065b6fb7286ae782b2 |
| identifier_str_mv | 10.3390/ma14216343 |
| network_acronym_str | Manara2 |
| network_name_str | Manara2 |
| oai_identifier_str | oai:figshare.com:article/25780980 |
| publishDate | 2021 |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| rights_invalid_str_mv | CC BY 4.0 |
| spelling | Activated Graphene Oxide-Calcium Alginate Beads for Adsorption of Methylene Blue and PharmaceuticalsBurcu Gunes (18527739)Yannick Jaquet (18527742)Laura Sánchez (471954)Rebecca Pumarino (18527745)Declan McGlade (18527748)Brid Quilty (1976071)Anne Morrissey (292738)Zahra Gholamvand (1423744)Kieran Nolan (2047333)Jenny Lawler (16931817)EngineeringEnvironmental engineeringEnvironmental sciencesEnvironmental managementadsorptiongraphene oxidemethylene bluepharmaceuticalskineticsisotherms and thermodynamics<div><p>The remarkable adsorption capacity of graphene-derived materials has prompted their examination in composite materials suitable for deployment in treatment of contaminated waters. In this study, crosslinked calcium alginate–graphene oxide beads were prepared and activated by exposure to pH 4 by using 0.1M HCl. The activated beads were investigated as novel adsorbents for the removal of organic pollutants (methylene blue dye and the pharmaceuticals famotidine and diclofenac) with a range of physicochemical properties. The effects of initial pollutant concentration, temperature, pH, and adsorbent dose were investigated, and kinetic models were examined for fit to the data. The maximum adsorption capacities qmax obtained were 1334, 35.50 and 36.35 mg g−1 for the uptake of methylene blue, famotidine and diclofenac, respectively. The equilibrium adsorption had an alignment with Langmuir isotherms, while the kinetics were most accurately modelled using pseudo- first-order and second order models according to the regression analysis. Thermodynamic parameters such as ΔG°, ΔH° and ΔS° were calculated and the adsorption process was determined to be exothermic and spontaneous.</p><p> </p></div><h2>Other Information</h2> <p> Published in: Materials<br> License: <a href="https://creativecommons.org/licenses/by/4.0/" target="_blank">https://creativecommons.org/licenses/by/4.0/</a><br>See article on publisher's website: <a href="https://dx.doi.org/10.3390/ma14216343" target="_blank">https://dx.doi.org/10.3390/ma14216343</a></p>2021-10-23T03:00:00ZTextJournal contributioninfo:eu-repo/semantics/publishedVersiontextcontribution to journal10.3390/ma14216343https://figshare.com/articles/journal_contribution/Activated_Graphene_Oxide-Calcium_Alginate_Beads_for_Adsorption_of_Methylene_Blue_and_Pharmaceuticals/25780980CC BY 4.0info:eu-repo/semantics/openAccessoai:figshare.com:article/257809802021-10-23T03:00:00Z |
| spellingShingle | Activated Graphene Oxide-Calcium Alginate Beads for Adsorption of Methylene Blue and Pharmaceuticals Burcu Gunes (18527739) Engineering Environmental engineering Environmental sciences Environmental management adsorption graphene oxide methylene blue pharmaceuticals kinetics isotherms and thermodynamics |
| status_str | publishedVersion |
| title | Activated Graphene Oxide-Calcium Alginate Beads for Adsorption of Methylene Blue and Pharmaceuticals |
| title_full | Activated Graphene Oxide-Calcium Alginate Beads for Adsorption of Methylene Blue and Pharmaceuticals |
| title_fullStr | Activated Graphene Oxide-Calcium Alginate Beads for Adsorption of Methylene Blue and Pharmaceuticals |
| title_full_unstemmed | Activated Graphene Oxide-Calcium Alginate Beads for Adsorption of Methylene Blue and Pharmaceuticals |
| title_short | Activated Graphene Oxide-Calcium Alginate Beads for Adsorption of Methylene Blue and Pharmaceuticals |
| title_sort | Activated Graphene Oxide-Calcium Alginate Beads for Adsorption of Methylene Blue and Pharmaceuticals |
| topic | Engineering Environmental engineering Environmental sciences Environmental management adsorption graphene oxide methylene blue pharmaceuticals kinetics isotherms and thermodynamics |