Investigation of mechanisms for simultaneous adsorption of iron and sulfate ions onto chitosan with formation of orthorhombic structures
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F20%3A10421864" target="_blank" >RIV/00216208:11310/20:10421864 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=qvsj_C_a9W" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=qvsj_C_a9W</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.colsurfa.2020.124575" target="_blank" >10.1016/j.colsurfa.2020.124575</a>
Alternative languages
Result language
angličtina
Original language name
Investigation of mechanisms for simultaneous adsorption of iron and sulfate ions onto chitosan with formation of orthorhombic structures
Original language description
The study confirms the interaction of sulfate ions (SO42-) into the polymer chains of chitosan under acidic conditions. As a result the crystallinity of chitosan decreases with (1) increasing protonation of the amino groups and (2) increasing SO42- concentration. The adsorption of iron ions (Fe2+/3+) resulting from (FeSO4)(aq) onto the chitosan surface takes place incidentally by the oxidative effect of Fe2+/3+ with formation of orthorhombic alpha-FeOOH and gamma-FeOOH. The separation of iron and sulfate ions correlates stoichiometrically. Chitosan with different degrees of deacetylation (DD) were used in order to investigate the influence of DD on the adsorption behavior of iron and sulfate ions. The higher the DD of chitosan, the more iron and sulfate ions can be adsorbed. Langmuir isotherms showed good agreement with the adsorption data obtained (q(DD)=90 %(Fe) = 2.36 mmol g(-1); q(DD)=90 %(SO42-) = 2.58 mmol g(-1)). After adsorption process, the adsorber was analyzed extensively via X-ray diffraction, FTIR, C-13-NMR, SEM/EDX measurements and Mossbauer spectroscopy.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10402 - Inorganic and nuclear chemistry
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Colloids and Surfaces A: Physicochemical and Engineering Aspects
ISSN
0927-7757
e-ISSN
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Volume of the periodical
592
Issue of the periodical within the volume
May
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
11
Pages from-to
124575
UT code for WoS article
000521956800021
EID of the result in the Scopus database
2-s2.0-85079739902