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Enhanced adsorption of Congo red using chitin suspension after sonoenzymolysis

In the present work, chitin suspensions after enzymolysis and sonoenzymolysis were taken as adsorbents to evaluate the adsorption properties of Congo red (CR) dyes. Compared with untreated chitin suspension, the CR adsorption performance was significantly improved after enzymolysis and even more aft...

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Detalles Bibliográficos
Autores principales: Hou, Furong, Wang, Danli, Ma, Xiaobin, Fan, Lihua, Ding, Tian, Ye, Xingqian, Liu, Donghong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7786638/
https://www.ncbi.nlm.nih.gov/pubmed/32961437
http://dx.doi.org/10.1016/j.ultsonch.2020.105327
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author Hou, Furong
Wang, Danli
Ma, Xiaobin
Fan, Lihua
Ding, Tian
Ye, Xingqian
Liu, Donghong
author_facet Hou, Furong
Wang, Danli
Ma, Xiaobin
Fan, Lihua
Ding, Tian
Ye, Xingqian
Liu, Donghong
author_sort Hou, Furong
collection PubMed
description In the present work, chitin suspensions after enzymolysis and sonoenzymolysis were taken as adsorbents to evaluate the adsorption properties of Congo red (CR) dyes. Compared with untreated chitin suspension, the CR adsorption performance was significantly improved after enzymolysis and even more after sonoenzymolysis. According to different adsorption kinetic and isotherm models, Langmuir isotherm and the pseudo-second order model were more reliable to describe the adsorption process of CR onto different chitin samples and demonstrated a monolayer and favorable physisorption process. What’s more, negative values of ΔG (Gibbs free energy change) and the shifts to higher negative values with the temperature increasing from adsorption thermodynamic study proved a spontaneous CR adsorption process. The structural characterization before and after adsorption further verified the physical adsorption between chitin and CR, and a larger specific area and higher porosity of chitin suspension was obtained after sonoenzymolysis with more available active sites.
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spelling pubmed-77866382021-01-06 Enhanced adsorption of Congo red using chitin suspension after sonoenzymolysis Hou, Furong Wang, Danli Ma, Xiaobin Fan, Lihua Ding, Tian Ye, Xingqian Liu, Donghong Ultrason Sonochem Original Research Article In the present work, chitin suspensions after enzymolysis and sonoenzymolysis were taken as adsorbents to evaluate the adsorption properties of Congo red (CR) dyes. Compared with untreated chitin suspension, the CR adsorption performance was significantly improved after enzymolysis and even more after sonoenzymolysis. According to different adsorption kinetic and isotherm models, Langmuir isotherm and the pseudo-second order model were more reliable to describe the adsorption process of CR onto different chitin samples and demonstrated a monolayer and favorable physisorption process. What’s more, negative values of ΔG (Gibbs free energy change) and the shifts to higher negative values with the temperature increasing from adsorption thermodynamic study proved a spontaneous CR adsorption process. The structural characterization before and after adsorption further verified the physical adsorption between chitin and CR, and a larger specific area and higher porosity of chitin suspension was obtained after sonoenzymolysis with more available active sites. Elsevier 2020-09-01 /pmc/articles/PMC7786638/ /pubmed/32961437 http://dx.doi.org/10.1016/j.ultsonch.2020.105327 Text en © 2020 Elsevier B.V. https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Original Research Article
Hou, Furong
Wang, Danli
Ma, Xiaobin
Fan, Lihua
Ding, Tian
Ye, Xingqian
Liu, Donghong
Enhanced adsorption of Congo red using chitin suspension after sonoenzymolysis
title Enhanced adsorption of Congo red using chitin suspension after sonoenzymolysis
title_full Enhanced adsorption of Congo red using chitin suspension after sonoenzymolysis
title_fullStr Enhanced adsorption of Congo red using chitin suspension after sonoenzymolysis
title_full_unstemmed Enhanced adsorption of Congo red using chitin suspension after sonoenzymolysis
title_short Enhanced adsorption of Congo red using chitin suspension after sonoenzymolysis
title_sort enhanced adsorption of congo red using chitin suspension after sonoenzymolysis
topic Original Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7786638/
https://www.ncbi.nlm.nih.gov/pubmed/32961437
http://dx.doi.org/10.1016/j.ultsonch.2020.105327
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