Enhanced Removal of Arsenic from Aqueous Medium by Modified Silica Nanospheres: Kinetic and Thermodynamic Studies
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F22%3A39917746" target="_blank" >RIV/00216275:25310/22:39917746 - isvavai.cz</a>
Result on the web
<a href="https://link.springer.com/article/10.1007%2Fs13369-021-05357-5" target="_blank" >https://link.springer.com/article/10.1007%2Fs13369-021-05357-5</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s13369-021-05357-5" target="_blank" >10.1007/s13369-021-05357-5</a>
Alternative languages
Result language
angličtina
Original language name
Enhanced Removal of Arsenic from Aqueous Medium by Modified Silica Nanospheres: Kinetic and Thermodynamic Studies
Original language description
In this study, silica nanospheres (S) and trizma base-modified silica nanospheres (ST2, ST4, ST6, and ST8) were synthesized for the removal of arsenic from aqueous medium with high efficiency. Characterization of the prepared solid adsorbents was performed with different techniques such as thermogravimetric analysis, scanning electron microscopy, X-ray diffraction patterns, transmission electron microscopy, selected area electron diffraction, fast Fourier transform, nitrogen adsorption, point of zero charge (pH(PZC)), and Fourier transform infrared. Adsorption of As+5 was investigated under different application conditions such as adsorbent dosage, pH, shaking time, temperature, and initial As+5 concentration. Maximum adsorption capacity reached 64.5 mg/g at pH 6, 0.9 g/L as adsorbent dosage, after 60 min of shaking time, and at 25 degrees C as the optimum adsorption conditions. Adsorption data of As+5 by the prepared nanoadsorbents are best fitted with Langmuir, Temkin, and Dubinin-Radushkevich models. Kinetic studies revealed that the adsorption followed pseudo-second-order and Elovich kinetic models. Thermodynamic studies prove that the adsorption process is endothermic, spontaneous, and chemisorption in nature. The most effective desorption was achieved by nitric acid with 99% desorption efficiency. The prepared silica nanospheres solid adsorbents showed a good reusability with 91% adsorption efficiency after four cycles of adsorption and desorption.
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
20501 - Materials engineering
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Arabian Journal for Science and Engineering
ISSN
2193-567X
e-ISSN
2191-4281
Volume of the periodical
47
Issue of the periodical within the volume
1
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
13
Pages from-to
281-293
UT code for WoS article
000611916100001
EID of the result in the Scopus database
2-s2.0-85099933023