Effect of beading parameters on cross-linked chitosan adsorptive properties

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23640%2F19%3A43956221" target="_blank" >RIV/49777513:23640/19:43956221 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.reactfunctpolym.2019.104354" target="_blank" >https://doi.org/10.1016/j.reactfunctpolym.2019.104354</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.reactfunctpolym.2019.104354" target="_blank" >10.1016/j.reactfunctpolym.2019.104354</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effect of beading parameters on cross-linked chitosan adsorptive properties

Popis výsledku v původním jazyce

Among countless applications, chitosan has the potential to be an effective and cheap adsorbent for pollutant removal in (waste) water. In form of beads, it also exhibits good mechanical and fluid dynamic properties that are suitable for utilization in large-scale adsorption processes (e.g. as column packing). The present study investigates the beading process to prepare chitosan and cross-linked chitosan beads by phase inversion method. Beading parameters (i.e. chitosan amount, acid concentration, non-solvent agent concentration, and temperature) are optimized to obtain an appropriate adsorbent structure to uptake large organic molecules (reactive red 2, a dye, is utilized as model pollutant). Chitosan beads present remarkably enhanced adsorption capacity, mainly thanks to increased specific surface area and porosity. The addition of a cross-linker (diepoxyoctane) further improves pollutant removal. The adsorption process is well-fitted by the Freundlich model, suggesting a multilayer adsorption. The kinetic study also substantiates the complexity of the adsorption mechanism on bead surface, which, however, is satisfactorily predicted by a simple fractal kinetic model. Finally, it is proved that chitosan and cross-linked chitosan beads can be recycled (by washing with NaOH solution) at least 5 times before sensible performance loss.

Název v anglickém jazyce

Effect of beading parameters on cross-linked chitosan adsorptive properties

Popis výsledku anglicky

Among countless applications, chitosan has the potential to be an effective and cheap adsorbent for pollutant removal in (waste) water. In form of beads, it also exhibits good mechanical and fluid dynamic properties that are suitable for utilization in large-scale adsorption processes (e.g. as column packing). The present study investigates the beading process to prepare chitosan and cross-linked chitosan beads by phase inversion method. Beading parameters (i.e. chitosan amount, acid concentration, non-solvent agent concentration, and temperature) are optimized to obtain an appropriate adsorbent structure to uptake large organic molecules (reactive red 2, a dye, is utilized as model pollutant). Chitosan beads present remarkably enhanced adsorption capacity, mainly thanks to increased specific surface area and porosity. The addition of a cross-linker (diepoxyoctane) further improves pollutant removal. The adsorption process is well-fitted by the Freundlich model, suggesting a multilayer adsorption. The kinetic study also substantiates the complexity of the adsorption mechanism on bead surface, which, however, is satisfactorily predicted by a simple fractal kinetic model. Finally, it is proved that chitosan and cross-linked chitosan beads can be recycled (by washing with NaOH solution) at least 5 times before sensible performance loss.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10404 - Polymer science

Projekt

<a href="/cs/project/LO1402" target="_blank" >LO1402: CENTEM+</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

REACTIVE &amp; FUNCTIONAL POLYMERS

ISSN

1381-5148

e-ISSN

—

Svazek periodika

144

Číslo periodika v rámci svazku

November 2019

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

"NESTRÁNKOVÁNO"

Kód UT WoS článku

000497248900009

EID výsledku v databázi Scopus

2-s2.0-85071853413