Carboxymethylated bacterial cellulose: an environmentally friendly adsorbent for lead removal from water

"Carboxymethylated bacterial cellulose (CMBC) was synthesized under controlled reaction condition to provide a material with a degree of substitution (DS) that guarantees that the characteristic water insolubility of cellulose is retained (DS = 0.17). The CMBC synthesized was fully characterize...

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Autores principales: Rossi, Ezequiel, Montoya Rojo, Úrsula, Cerrutti, Patricia, Foresti, María Laura, Errea, María Inés
Formato: Artículos de Publicaciones Periódicas acceptedVersion
Lenguaje:Inglés
Publicado: 2019
Materias:
ADSORCION
INTERCAMBIO DE IONES
AGUA
CELULOSA BACTERIANA
TRATAMIENTO DEL AGUA
Acceso en línea:http://ri.itba.edu.ar/handle/123456789/1654
Aporte de:
Repositorio Institucional Instituto Tecnológico de Buenos Aires (ITBA) de Instituto Tecnológico de Buenos Aires (ITBA)
id I32-R138-123456789-1654
record_format dspace
spelling I32-R138-123456789-16542022-12-07T13:06:55Z Carboxymethylated bacterial cellulose: an environmentally friendly adsorbent for lead removal from water Rossi, Ezequiel Montoya Rojo, Úrsula Cerrutti, Patricia Foresti, María Laura Errea, María Inés ADSORCION INTERCAMBIO DE IONES AGUA CELULOSA BACTERIANA TRATAMIENTO DEL AGUA "Carboxymethylated bacterial cellulose (CMBC) was synthesized under controlled reaction condition to provide a material with a degree of substitution (DS) that guarantees that the characteristic water insolubility of cellulose is retained (DS = 0.17). The CMBC synthesized was fully characterized by conductometric titration, infrared spectroscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy, thermogravimetric analysis and solubility assays. The suitability of the produced CMBC for lead removal from water was evaluated. Experimental isotherm data were fitted to different models of sorption isotherms: Langmuir, Freundlich, Dubinin-Radushkevich, and Frumkin, with Langmuir equation resulting in the best fit. Kinetic data were also adjusted to pseudo-first-order and pseudo-second-order models and results undoubtedly showed that the pseudosecond-order kinetic equation was the one that most appropriately described the lead adsorption of CMBC, indicating that lead is adsorbed on CMBC predominantly by chemical interaction. The breakthrough curve was fitted to different models: Bohart-Adams, Clark and Modified Dose-Response, being the Bohart-Adams equation the one that gave the best fit. Desorption studies were carried out in order to know the technical feasibility of the reuse of CMBC. Almost 96% of the retained lead was eluted in just 20 mL, and the CMBC lifetime was over 50 adsorption/desorption cycles. Overall, results obtained suggest that the CMBC herein synthesized may result in an alternative economic and environmentally friendly lead adsorbent for water treatment." 2019-07-16T14:45:35Z 2019-07-16T14:45:35Z 2018-12 Artículos de Publicaciones Periódicas info:eu-repo/semantics/acceptedVersion 2213-3437 http://ri.itba.edu.ar/handle/123456789/1654 en info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jece.2018.10.055 info:eu-repo/grantAgreement/ITBA/ITBACyT/44/AR. Ciudad Autónoma de Buenos Aires info:eu-repo/grantAgreement/CONICET/PIP/11220150100660CO/AR. Ciudad Autónoma de Buenos Aires info:eu-repo/grantAgreement/ANPCyT/PICT/2016-0843/AR. Ciudad Autónoma de Buenos Aires application/pdf
institution Instituto Tecnológico de Buenos Aires (ITBA)
institution_str I-32
repository_str R-138
collection Repositorio Institucional Instituto Tecnológico de Buenos Aires (ITBA)
language Inglés
topic ADSORCION
INTERCAMBIO DE IONES
AGUA
CELULOSA BACTERIANA
TRATAMIENTO DEL AGUA
spellingShingle ADSORCION
INTERCAMBIO DE IONES
AGUA
CELULOSA BACTERIANA
TRATAMIENTO DEL AGUA
Rossi, Ezequiel
Montoya Rojo, Úrsula
Cerrutti, Patricia
Foresti, María Laura
Errea, María Inés
Carboxymethylated bacterial cellulose: an environmentally friendly adsorbent for lead removal from water
topic_facet ADSORCION
INTERCAMBIO DE IONES
AGUA
CELULOSA BACTERIANA
TRATAMIENTO DEL AGUA
description "Carboxymethylated bacterial cellulose (CMBC) was synthesized under controlled reaction condition to provide a material with a degree of substitution (DS) that guarantees that the characteristic water insolubility of cellulose is retained (DS = 0.17). The CMBC synthesized was fully characterized by conductometric titration, infrared spectroscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy, thermogravimetric analysis and solubility assays. The suitability of the produced CMBC for lead removal from water was evaluated. Experimental isotherm data were fitted to different models of sorption isotherms: Langmuir, Freundlich, Dubinin-Radushkevich, and Frumkin, with Langmuir equation resulting in the best fit. Kinetic data were also adjusted to pseudo-first-order and pseudo-second-order models and results undoubtedly showed that the pseudosecond-order kinetic equation was the one that most appropriately described the lead adsorption of CMBC, indicating that lead is adsorbed on CMBC predominantly by chemical interaction. The breakthrough curve was fitted to different models: Bohart-Adams, Clark and Modified Dose-Response, being the Bohart-Adams equation the one that gave the best fit. Desorption studies were carried out in order to know the technical feasibility of the reuse of CMBC. Almost 96% of the retained lead was eluted in just 20 mL, and the CMBC lifetime was over 50 adsorption/desorption cycles. Overall, results obtained suggest that the CMBC herein synthesized may result in an alternative economic and environmentally friendly lead adsorbent for water treatment."
format Artículos de Publicaciones Periódicas
acceptedVersion
author Rossi, Ezequiel
Montoya Rojo, Úrsula
Cerrutti, Patricia
Foresti, María Laura
Errea, María Inés
author_facet Rossi, Ezequiel
Montoya Rojo, Úrsula
Cerrutti, Patricia
Foresti, María Laura
Errea, María Inés
author_sort Rossi, Ezequiel
title Carboxymethylated bacterial cellulose: an environmentally friendly adsorbent for lead removal from water
title_short Carboxymethylated bacterial cellulose: an environmentally friendly adsorbent for lead removal from water
title_full Carboxymethylated bacterial cellulose: an environmentally friendly adsorbent for lead removal from water
title_fullStr Carboxymethylated bacterial cellulose: an environmentally friendly adsorbent for lead removal from water
title_full_unstemmed Carboxymethylated bacterial cellulose: an environmentally friendly adsorbent for lead removal from water
title_sort carboxymethylated bacterial cellulose: an environmentally friendly adsorbent for lead removal from water
publishDate 2019
url http://ri.itba.edu.ar/handle/123456789/1654
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