Ca treated Palygorskite and Halloysite clay minerals for Ferrous Iron (Fe+2) removal from water systems
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F20%3A10422557" target="_blank" >RIV/00216208:11320/20:10422557 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=.OUNnC8IFp" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=.OUNnC8IFp</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.eti.2020.100961" target="_blank" >10.1016/j.eti.2020.100961</a>
Alternative languages
Result language
angličtina
Original language name
Ca treated Palygorskite and Halloysite clay minerals for Ferrous Iron (Fe+2) removal from water systems
Original language description
Palygorskite fibers and halloysite nanotubes (HNT) were used for the Fe (II) uptake from aqueous solutions under various experimental conditions. Palygorskite and halloysite samples were characterized using XRD, FTIR, SEM, BET and CEC and then were saturated by exchanging Ca+2 cations. The Ca-Palygorskite (Ca-Pal) and Ca-Halloysite (Ca-Hall) were characterized as well, and applied in batch kinetic experiments series. It was shown that both Ca-treated clay minerals were more efficient adsorbents for the lowest ferrous concentrations removal (5 mg/L), especially when the highest solid: liquid ratio (20 g/L) have been applied, reaching 99.8% and 91.2% removal with Ca-Pal and Ca-Hall respectively, within 10 min at the optimal room temperature (20 +/- 1 degrees C). The pH value affected the adsorption's efficiency, as Ca-Pal was more efficient adsorbent at acidic values (4-6), while Ca-Hall efficiency is positively correlated with pH increase (7 <). Moreover, the competitive ions found to prohibit Ca-Hall capacity for Fe (II), following the order Mn<K<Cu<Zn<Ba<Mg<Na, but Ca-Pal is slightly affected by K<Na=Mn<Zn<Cu<Mg<Ba, highlighting its preference to a Fe cations. According to the thermodynamic analysis the Fe (II) uptake is a physical and spontaneous process, while both Ca-Pal and Ca-Hall fit in Langmuir isotherm instead of Freundlich, indicating monolayer sorption. The exact mechanism of Ca-Pal efficient adsorption was verified and further explained with molecular simulation optimization by Material Studio 4.3. (c) 2020 Elsevier B.V. All rights reserved.
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
10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)
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
Environmental Technology and Innovation
ISSN
2352-1864
e-ISSN
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Volume of the periodical
19
Issue of the periodical within the volume
2020
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
15
Pages from-to
100961
UT code for WoS article
000580866600036
EID of the result in the Scopus database
2-s2.0-85085995599