Iron nanoparticles based nanofluids for in situ environmental remediation

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The injection of nanoscale zerovalent iron particles (nZVI) suspensions in the ground is a technology employed for in situ water and soil remediation. Due to its nature, nZVI forming these nanofluids (NFs), tend to agglomerate, but this can be overcome by polyelectrolyte coatings, that also improve...

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Autores principales: Crespi, Julieta, Binetti Basterrechea, Gian Franco, Finoli, Agostina Sol, Montesinos, Victor Nahuel, Quici, Natalia
Formato: Artículo acceptedVersion
Lenguaje:Inglés
Inglés
Publicado: 2024
Materias:
in situ
zerovalent iron nanoparticles
Cr(VI)
stable nanofluids
Acceso en línea:http://hdl.handle.net/20.500.12272/11222
Aporte de:
RIA - Repositorio Institucional Abierto (UTN) de Universidad Tecnológica Nacional
id I68-R174-20.500.12272-11222
record_format dspace
spelling I68-R174-20.500.12272-112222024-08-02T18:42:55Z Iron nanoparticles based nanofluids for in situ environmental remediation Crespi, Julieta Binetti Basterrechea, Gian Franco Finoli, Agostina Sol Montesinos, Victor Nahuel Quici, Natalia in situ zerovalent iron nanoparticles Cr(VI) stable nanofluids The injection of nanoscale zerovalent iron particles (nZVI) suspensions in the ground is a technology employed for in situ water and soil remediation. Due to its nature, nZVI forming these nanofluids (NFs), tend to agglomerate, but this can be overcome by polyelectrolyte coatings, that also improve their mobility. In this work, stabilization of nZVI with carboxymethylcellulose (CMC) was studied. NFs prepared with CMC (CMC-NSTAR) were compared with non-stabilized NFs (b-NSTAR). First, the stabilization efficiency was evaluated by the analysis of the nanoparticles sedimentation rate. Then, the mobility of stabilized and non-stabilized NFs was studied in columns filled with porous media at laboratory and pilot scale. Finally, NFs reactivity for the removal of aqueous Cr(VI) was tested in batch and columns experiments. In the column experiments, a porous media bed was loaded with NSTAR and then a Cr(VI) solution was injected upwards. CMC-NSTAR showed good mobility at both scales being successfully eluted from the porous media. In the case of b-NSTAR, the accumulation of nanoparticles in the bottom of the column was observed and elution was not achieved. Using b-NSTAR as reactive barrier, a total removal of 15.5 mg Cr(VI)/g Fe was achieved. Better removal rates were found in batch experiments (22.8 mg Cr(VI)/g Fe). Reactivity experiments in batch with CMC-NSTAR showed 39.9 mg Cr(VI)/g Fe removal. In conclusion, the NF was proved to have good transport properties and Cr(VI) removal capacity. Crespi, Julieta. Instituto Sabato (UNSAM-CNEA); CTQ (UTN FRBA); DQRA (CNEA) Binetti Basterrechea, Gian Franco. CTQ (UTN FRBA); Argentina. Finoli, Agostina Sol. CTQ (UTN FRBA); Argentina. Montesinos, Victor Nahuel. DQRA (CONICET; CNEA); CTQ (UTN FRBA); Argentina. Quici, Natalia. DQRA (CONICET; CNEA); CTQ (UTN FRBA); Argentina. Peer Reviewed 2024-08-02T18:42:55Z 2024-08-02T18:42:55Z 2023 info:eu-repo/semantics/article acceptedVersion http://hdl.handle.net/20.500.12272/11222 - eng eng openAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ Attribution-NonCommercial-NoDerivatives 4.0 Internacional Creative Commons, Atribución – No Comercial – Sin Obra Derivada pdf
institution Universidad Tecnológica Nacional
institution_str I-68
repository_str R-174
collection RIA - Repositorio Institucional Abierto (UTN)
language Inglés
Inglés
topic in situ
zerovalent iron nanoparticles
Cr(VI)
stable nanofluids
spellingShingle in situ
zerovalent iron nanoparticles
Cr(VI)
stable nanofluids
Crespi, Julieta
Binetti Basterrechea, Gian Franco
Finoli, Agostina Sol
Montesinos, Victor Nahuel
Quici, Natalia
Iron nanoparticles based nanofluids for in situ environmental remediation
topic_facet in situ
zerovalent iron nanoparticles
Cr(VI)
stable nanofluids
description The injection of nanoscale zerovalent iron particles (nZVI) suspensions in the ground is a technology employed for in situ water and soil remediation. Due to its nature, nZVI forming these nanofluids (NFs), tend to agglomerate, but this can be overcome by polyelectrolyte coatings, that also improve their mobility. In this work, stabilization of nZVI with carboxymethylcellulose (CMC) was studied. NFs prepared with CMC (CMC-NSTAR) were compared with non-stabilized NFs (b-NSTAR). First, the stabilization efficiency was evaluated by the analysis of the nanoparticles sedimentation rate. Then, the mobility of stabilized and non-stabilized NFs was studied in columns filled with porous media at laboratory and pilot scale. Finally, NFs reactivity for the removal of aqueous Cr(VI) was tested in batch and columns experiments. In the column experiments, a porous media bed was loaded with NSTAR and then a Cr(VI) solution was injected upwards. CMC-NSTAR showed good mobility at both scales being successfully eluted from the porous media. In the case of b-NSTAR, the accumulation of nanoparticles in the bottom of the column was observed and elution was not achieved. Using b-NSTAR as reactive barrier, a total removal of 15.5 mg Cr(VI)/g Fe was achieved. Better removal rates were found in batch experiments (22.8 mg Cr(VI)/g Fe). Reactivity experiments in batch with CMC-NSTAR showed 39.9 mg Cr(VI)/g Fe removal. In conclusion, the NF was proved to have good transport properties and Cr(VI) removal capacity.
format Artículo
acceptedVersion
author Crespi, Julieta
Binetti Basterrechea, Gian Franco
Finoli, Agostina Sol
Montesinos, Victor Nahuel
Quici, Natalia
author_facet Crespi, Julieta
Binetti Basterrechea, Gian Franco
Finoli, Agostina Sol
Montesinos, Victor Nahuel
Quici, Natalia
author_sort Crespi, Julieta
title Iron nanoparticles based nanofluids for in situ environmental remediation
title_short Iron nanoparticles based nanofluids for in situ environmental remediation
title_full Iron nanoparticles based nanofluids for in situ environmental remediation
title_fullStr Iron nanoparticles based nanofluids for in situ environmental remediation
title_full_unstemmed Iron nanoparticles based nanofluids for in situ environmental remediation
title_sort iron nanoparticles based nanofluids for in situ environmental remediation
publishDate 2024
url http://hdl.handle.net/20.500.12272/11222
work_keys_str_mv AT crespijulieta ironnanoparticlesbasednanofluidsforinsituenvironmentalremediation
AT binettibasterrecheagianfranco ironnanoparticlesbasednanofluidsforinsituenvironmentalremediation
AT finoliagostinasol ironnanoparticlesbasednanofluidsforinsituenvironmentalremediation
AT montesinosvictornahuel ironnanoparticlesbasednanofluidsforinsituenvironmentalremediation
AT quicinatalia ironnanoparticlesbasednanofluidsforinsituenvironmentalremediation
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