Carbon Nanotubes Hybrid Hydrogels for Environmental Remediation: Evaluation of Adsorption Efficiency under Electric Field

The performance of Carbon Nanotubes hybrid hydrogels for environmental remediation was investigated using Methylene Blue (MB), Rhodamine B (RD), and Bengal Rose (BR) as model contaminating dyes. An acrylate hydrogel network with incorporated CNT was synthesized by photo-polymerization without any pr...

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Autores principales:	Giuseppe Cirillo, Manuela Curcio, Lorenzo Francesco Madeo, Francesca Iemma, Giovanni De Filpo, Silke Hampel, Fiore Pasquale Nicoletta
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	wastewater treatment hybrid hydrogel carbon nanotubes isothermal studies kinetic studies Organic chemistry QD241-441
Acceso en línea:	https://doaj.org/article/006bc3929f8040979a8baeb9bb8d0de4
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spelling	oai:doaj.org-article:006bc3929f8040979a8baeb9bb8d0de42021-11-25T18:29:06ZCarbon Nanotubes Hybrid Hydrogels for Environmental Remediation: Evaluation of Adsorption Efficiency under Electric Field10.3390/molecules262270011420-3049https://doaj.org/article/006bc3929f8040979a8baeb9bb8d0de42021-11-01T00:00:00Zhttps://www.mdpi.com/1420-3049/26/22/7001https://doaj.org/toc/1420-3049The performance of Carbon Nanotubes hybrid hydrogels for environmental remediation was investigated using Methylene Blue (MB), Rhodamine B (RD), and Bengal Rose (BR) as model contaminating dyes. An acrylate hydrogel network with incorporated CNT was synthesized by photo-polymerization without any preliminary derivatization of CNT surface. Thermodynamics, isothermal and kinetic studies showed favorable sorption processes with the application of an external 12 V electric field found to be able to influence the amount of adsorbed dyes: stronger interactions with cationic MB molecules (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>q</mi><mrow><mi>e</mi><mi>x</mi><mi>p</mi></mrow></msub></mrow></semantics></math></inline-formula> and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msubsup><mi>q</mi><mrow><mi>e</mi><mi>x</mi><mi>p</mi></mrow><mrow><mn>12</mn></mrow></msubsup></mrow></semantics></math></inline-formula> of 19.72 and 33.45 mg g<sup>−1</sup>, respectively) and reduced affinity for anionic RD (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>q</mi><mrow><mi>e</mi><mi>x</mi><mi>p</mi></mrow></msub></mrow></semantics></math></inline-formula> and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msubsup><mi>q</mi><mrow><mi>e</mi><mi>x</mi><mi>p</mi></mrow><mrow><mn>12</mn></mrow></msubsup></mrow></semantics></math></inline-formula> of 28.93 and 13.06 mg g<sup>−1</sup>, respectively) and neutral BR (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>q</mi><mrow><mi>e</mi><mi>x</mi><mi>p</mi></mrow></msub></mrow></semantics></math></inline-formula> and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msubsup><mi>q</mi><mrow><mi>e</mi><mi>x</mi><mi>p</mi></mrow><mrow><mn>12</mn></mrow></msubsup></mrow></semantics></math></inline-formula> of 36.75 and 15.85 mg g<sup>−1</sup>, respectively) molecules were recorded. The influence of pH variation on dyes adsorption was finally highlighted by reusability studies, with the negligible variation of adsorption capacity after five repeated sorption cycles claiming for the suitability of the proposed systems as effective sorbent for wastewater treatment.Giuseppe CirilloManuela CurcioLorenzo Francesco MadeoFrancesca IemmaGiovanni De FilpoSilke HampelFiore Pasquale NicolettaMDPI AGarticlewastewater treatmenthybrid hydrogelcarbon nanotubesisothermal studieskinetic studiesOrganic chemistryQD241-441ENMolecules, Vol 26, Iss 7001, p 7001 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	wastewater treatment hybrid hydrogel carbon nanotubes isothermal studies kinetic studies Organic chemistry QD241-441
spellingShingle	wastewater treatment hybrid hydrogel carbon nanotubes isothermal studies kinetic studies Organic chemistry QD241-441 Giuseppe Cirillo Manuela Curcio Lorenzo Francesco Madeo Francesca Iemma Giovanni De Filpo Silke Hampel Fiore Pasquale Nicoletta Carbon Nanotubes Hybrid Hydrogels for Environmental Remediation: Evaluation of Adsorption Efficiency under Electric Field
description	The performance of Carbon Nanotubes hybrid hydrogels for environmental remediation was investigated using Methylene Blue (MB), Rhodamine B (RD), and Bengal Rose (BR) as model contaminating dyes. An acrylate hydrogel network with incorporated CNT was synthesized by photo-polymerization without any preliminary derivatization of CNT surface. Thermodynamics, isothermal and kinetic studies showed favorable sorption processes with the application of an external 12 V electric field found to be able to influence the amount of adsorbed dyes: stronger interactions with cationic MB molecules (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>q</mi><mrow><mi>e</mi><mi>x</mi><mi>p</mi></mrow></msub></mrow></semantics></math></inline-formula> and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msubsup><mi>q</mi><mrow><mi>e</mi><mi>x</mi><mi>p</mi></mrow><mrow><mn>12</mn></mrow></msubsup></mrow></semantics></math></inline-formula> of 19.72 and 33.45 mg g<sup>−1</sup>, respectively) and reduced affinity for anionic RD (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>q</mi><mrow><mi>e</mi><mi>x</mi><mi>p</mi></mrow></msub></mrow></semantics></math></inline-formula> and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msubsup><mi>q</mi><mrow><mi>e</mi><mi>x</mi><mi>p</mi></mrow><mrow><mn>12</mn></mrow></msubsup></mrow></semantics></math></inline-formula> of 28.93 and 13.06 mg g<sup>−1</sup>, respectively) and neutral BR (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>q</mi><mrow><mi>e</mi><mi>x</mi><mi>p</mi></mrow></msub></mrow></semantics></math></inline-formula> and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msubsup><mi>q</mi><mrow><mi>e</mi><mi>x</mi><mi>p</mi></mrow><mrow><mn>12</mn></mrow></msubsup></mrow></semantics></math></inline-formula> of 36.75 and 15.85 mg g<sup>−1</sup>, respectively) molecules were recorded. The influence of pH variation on dyes adsorption was finally highlighted by reusability studies, with the negligible variation of adsorption capacity after five repeated sorption cycles claiming for the suitability of the proposed systems as effective sorbent for wastewater treatment.
format	article
author	Giuseppe Cirillo Manuela Curcio Lorenzo Francesco Madeo Francesca Iemma Giovanni De Filpo Silke Hampel Fiore Pasquale Nicoletta
author_facet	Giuseppe Cirillo Manuela Curcio Lorenzo Francesco Madeo Francesca Iemma Giovanni De Filpo Silke Hampel Fiore Pasquale Nicoletta
author_sort	Giuseppe Cirillo
title	Carbon Nanotubes Hybrid Hydrogels for Environmental Remediation: Evaluation of Adsorption Efficiency under Electric Field
title_short	Carbon Nanotubes Hybrid Hydrogels for Environmental Remediation: Evaluation of Adsorption Efficiency under Electric Field
title_full	Carbon Nanotubes Hybrid Hydrogels for Environmental Remediation: Evaluation of Adsorption Efficiency under Electric Field
title_fullStr	Carbon Nanotubes Hybrid Hydrogels for Environmental Remediation: Evaluation of Adsorption Efficiency under Electric Field
title_full_unstemmed	Carbon Nanotubes Hybrid Hydrogels for Environmental Remediation: Evaluation of Adsorption Efficiency under Electric Field
title_sort	carbon nanotubes hybrid hydrogels for environmental remediation: evaluation of adsorption efficiency under electric field
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/006bc3929f8040979a8baeb9bb8d0de4
work_keys_str_mv	AT giuseppecirillo carbonnanotubeshybridhydrogelsforenvironmentalremediationevaluationofadsorptionefficiencyunderelectricfield AT manuelacurcio carbonnanotubeshybridhydrogelsforenvironmentalremediationevaluationofadsorptionefficiencyunderelectricfield AT lorenzofrancescomadeo carbonnanotubeshybridhydrogelsforenvironmentalremediationevaluationofadsorptionefficiencyunderelectricfield AT francescaiemma carbonnanotubeshybridhydrogelsforenvironmentalremediationevaluationofadsorptionefficiencyunderelectricfield AT giovannidefilpo carbonnanotubeshybridhydrogelsforenvironmentalremediationevaluationofadsorptionefficiencyunderelectricfield AT silkehampel carbonnanotubeshybridhydrogelsforenvironmentalremediationevaluationofadsorptionefficiencyunderelectricfield AT fiorepasqualenicoletta carbonnanotubeshybridhydrogelsforenvironmentalremediationevaluationofadsorptionefficiencyunderelectricfield
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Carbon Nanotubes Hybrid Hydrogels for Environmental Remediation: Evaluation of Adsorption Efficiency under Electric Field

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