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

artículo de publicación periódica.page.titleprefix
Preparation of an environmentally friendly lead adsorbent. A contribution to the rational design of heavy metal adsorbents

dc.contributor.author	Rossi, Ezequiel
dc.contributor.author	Ávila Ramírez, Jhon Alejandro
dc.contributor.author	Errea, María Inés
dc.date	info:eu-repo/date/embargoEnd/2015-10-05
dc.date.accessioned	2020-12-21T15:37:25Z
dc.date.available	2020-12-21T15:37:25Z
dc.date.issued	2020-10
dc.description.abstract	"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."	en
dc.identifier.issn	2213-3437
dc.identifier.uri	http://ri.itba.edu.ar/handle/123456789/3266
dc.language.iso	en	en
dc.relation	nfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.jece.2020.104210
dc.relation	info:eu-repo/grantAgreement/ITBA/AR. Ciudad Autónoma de Buenos Aires
dc.rights	info:eu-repo/semantics/embargoedAccess
dc.subject	BIOPOLIMEROS	es
dc.subject	QUITOSANO	es
dc.subject	ADSORCION	es
dc.subject	METALES PESADOS	es
dc.subject	ACIDO MUCICO	es
dc.title	Preparation of an environmentally friendly lead adsorbent. A contribution to the rational design of heavy metal adsorbents	en
dc.type	Artículos de Publicaciones Periódicas	es
dc.type	info:eu-repo/semantics/acceptedVersion
dspace.entity.type	Artículo de Publicación Periódica
itba.description.filiation	Fil: Rossi, Ezequiel. Instituto Tecnológico de Buenos Aires; Argentina.
itba.description.filiation	Fil: Rossi, Ezequiel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.
itba.description.filiation	Fil: Ávila Ramírez, Jhon Alejandro. Instituto Tecnológico de Buenos Aires; Argentina.
itba.description.filiation	Fil: Ávila Ramírez, Jhon Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.
itba.description.filiation	Fil: Errea, María Inés. Instituto Tecnológico de Buenos Aires; Argentina.