Preparation of an environmentally friendly lead adsorbent. A contribution to the rational design of heavy metal adsorbents

"This work described the preparation and characterization of water insoluble chitosan derivatives as lead adsorbents. In highly regioselective reactions, N-substituted crosslinked chitosan derivatives were obtained by crosslinking native chitosan with mucic and adipic acid (a polyhydroxylated a...

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Autores principales: Rossi, Ezequiel, Ávila Ramírez, Jhon Alejandro, Errea, María Inés
Formato: Artículos de Publicaciones Periódicas acceptedVersion
Lenguaje:Inglés
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Acceso en línea:http://ri.itba.edu.ar/handle/123456789/3266
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spelling I32-R138-123456789-32662022-12-07T13:05:53Z Preparation of an environmentally friendly lead adsorbent. A contribution to the rational design of heavy metal adsorbents Rossi, Ezequiel Ávila Ramírez, Jhon Alejandro Errea, María Inés BIOPOLIMEROS QUITOSANO ADSORCION METALES PESADOS ACIDO MUCICO "This work described the preparation and characterization of water insoluble chitosan derivatives as lead adsorbents. In highly regioselective reactions, N-substituted crosslinked chitosan derivatives were obtained by crosslinking native chitosan with mucic and adipic acid (a polyhydroxylated and a non-functionalized diacid of the same length chains). The crosslinking degree of the chitosan modified with adipic acid was significantly higher than that crosslinked with mucic acid (0.446 and 0.316, respectively), while the degree of substitution was almost the same (approximately 80 %). Lead adsorption isotherms were constructed at different temperatures and adjusted to well-known models, obtaining the best fit to the experimental data with Langmuir model. The lead adsorption capacity of new materials was greater than many of the adsorbents described in literature (76.3 and 69.7 mg g−1 for chitosan modified with mucic and adipic acid, respectively). Moreover, thermodynamic parameters were calculated, and results showed that the lead adsorption on the derivatives was spontaneous, exothermic, and governed by chemical interaction. Besides, kinetic studies were performed and adjusted to well-known models. The pseudo-second order kinetic equation was the one that most appropriately described the lead adsorption on the new materials. Results were consistent with the strong electrostatic attraction established between the lead cations and the free carboxylate groups of the derivatives." info:eu-repo/date/embargoEnd/2015-10-05 2020-12-21T15:37:25Z 2020-12-21T15:37:25Z 2020-10 Artículos de Publicaciones Periódicas info:eu-repo/semantics/acceptedVersion 2213-3437 http://ri.itba.edu.ar/handle/123456789/3266 en nfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.jece.2020.104210 info:eu-repo/grantAgreement/ITBA/AR. Ciudad Autónoma de Buenos Aires info:eu-repo/semantics/embargoedAccess 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 BIOPOLIMEROS
QUITOSANO
ADSORCION
METALES PESADOS
ACIDO MUCICO
spellingShingle BIOPOLIMEROS
QUITOSANO
ADSORCION
METALES PESADOS
ACIDO MUCICO
Rossi, Ezequiel
Ávila Ramírez, Jhon Alejandro
Errea, María Inés
Preparation of an environmentally friendly lead adsorbent. A contribution to the rational design of heavy metal adsorbents
topic_facet BIOPOLIMEROS
QUITOSANO
ADSORCION
METALES PESADOS
ACIDO MUCICO
description "This work described the preparation and characterization of water insoluble chitosan derivatives as lead adsorbents. In highly regioselective reactions, N-substituted crosslinked chitosan derivatives were obtained by crosslinking native chitosan with mucic and adipic acid (a polyhydroxylated and a non-functionalized diacid of the same length chains). The crosslinking degree of the chitosan modified with adipic acid was significantly higher than that crosslinked with mucic acid (0.446 and 0.316, respectively), while the degree of substitution was almost the same (approximately 80 %). Lead adsorption isotherms were constructed at different temperatures and adjusted to well-known models, obtaining the best fit to the experimental data with Langmuir model. The lead adsorption capacity of new materials was greater than many of the adsorbents described in literature (76.3 and 69.7 mg g−1 for chitosan modified with mucic and adipic acid, respectively). Moreover, thermodynamic parameters were calculated, and results showed that the lead adsorption on the derivatives was spontaneous, exothermic, and governed by chemical interaction. Besides, kinetic studies were performed and adjusted to well-known models. The pseudo-second order kinetic equation was the one that most appropriately described the lead adsorption on the new materials. Results were consistent with the strong electrostatic attraction established between the lead cations and the free carboxylate groups of the derivatives."
format Artículos de Publicaciones Periódicas
acceptedVersion
author Rossi, Ezequiel
Ávila Ramírez, Jhon Alejandro
Errea, María Inés
author_facet Rossi, Ezequiel
Ávila Ramírez, Jhon Alejandro
Errea, María Inés
author_sort Rossi, Ezequiel
title Preparation of an environmentally friendly lead adsorbent. A contribution to the rational design of heavy metal adsorbents
title_short Preparation of an environmentally friendly lead adsorbent. A contribution to the rational design of heavy metal adsorbents
title_full Preparation of an environmentally friendly lead adsorbent. A contribution to the rational design of heavy metal adsorbents
title_fullStr Preparation of an environmentally friendly lead adsorbent. A contribution to the rational design of heavy metal adsorbents
title_full_unstemmed Preparation of an environmentally friendly lead adsorbent. A contribution to the rational design of heavy metal adsorbents
title_sort preparation of an environmentally friendly lead adsorbent. a contribution to the rational design of heavy metal adsorbents
publishDate info
url http://ri.itba.edu.ar/handle/123456789/3266
work_keys_str_mv AT rossiezequiel preparationofanenvironmentallyfriendlyleadadsorbentacontributiontotherationaldesignofheavymetaladsorbents
AT avilaramirezjhonalejandro preparationofanenvironmentallyfriendlyleadadsorbentacontributiontotherationaldesignofheavymetaladsorbents
AT erreamariaines preparationofanenvironmentallyfriendlyleadadsorbentacontributiontotherationaldesignofheavymetaladsorbents
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