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Naslov:Adsorption efficiency of cadmium (II) by different alkali-activated materials
Avtorji:ID Mladenović Nikolić, Nataša (Avtor)
ID Kljajević, Ljiljana (Avtor)
ID Nenadović, Snežana B. (Avtor)
ID Potočnik, Jelena (Avtor)
ID Knežević, Sanja (Avtor)
ID Dolenec, Sabina (Avtor)
ID Trivunac, Katarina (Avtor)
Datoteke:URL URL - Izvorni URL, za dostop obiščite https://www.mdpi.com/2310-2861/10/5/317
 
.pdf PDF - Predstavitvena datoteka, prenos (7,68 MB)
MD5: D338C52D5597B43DCA20FE322B3E4D7F
 
Jezik:Angleški jezik
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:Logo ZAG - Zavod za gradbeništvo Slovenije
Povzetek:The objective of this study was to demonstrate the potential utilization of fly ash (FA), wood ash (WA), and metakaolin (MK) in developing new alkali-activated materials (AAMs) for the removal of cadmium ions from waste water. The synthesis of AAMs involved the dissolution of solid precursors, FA, WA, and MK, by a liquid activator (Na2SiO3 and NaOH). In concentrated solutions of the activator, the formation of an aluminosilicate gel structure occurred. DRIFT spectroscopy of the AAMs indicated main vibration bands between 1036 cm−1 and 996 cm−1, corresponding to Si-O-Si/Si-O-Al bands. Shifting vibration bands were seen at 1028 cm−1 to 1021 cm−1, indicating that the Si-O-Si/Si-O-Al bond is elongating, and the bond angle is decreasing. Based on the X-ray diffraction results, alkali-activated samples consist of an amorphous phase and residual mineral phases. The characteristic “hump” of an amorphous phase in the range from 20 to 40◦ 2θ was observed in FA and in all AWAFA samples. By the XRD patterns of the AAMs obtained by the activation of a solid three-component system, a new crystalline phase, gehlenite, was identified. The efficiency of AAMs in removing cadmium ions from aqueous solutions was tested under various conditions. The highest values of adsorption capacity, 64.76 mg/g (AWAFA6), 67.02 mg/g (AWAFAMK6), and 72.84 mg/gmg/g (AWAMK6), were obtained for materials activated with a 6 M NaOH solution in the alkali activator. The Langmuir adsorption isotherm and pseudo-second kinetic order provided the best fit for all investigated AAMs.
Ključne besede:fly ash, metakaolin, wood ash, adsorption kinetics, cadmium (II)
Status publikacije:Objavljeno
Verzija publikacije:Objavljena publikacija
Datum objave:05.05.2024
Založnik:MDPI AG
Leto izida:2024
Št. strani:str. 1-23
Številčenje:Vol. 10, iss. 5, [article no. 317]
PID:20.500.12556/DiRROS-18981 Novo okno
UDK:54
ISSN pri članku:2310-2861
DOI:10.3390/gels10050317 Novo okno
COBISS.SI-ID:194423043 Novo okno
Avtorske pravice:© 2024 by the authors. Licensee MDPI, Basel, Switzerland.
Opomba:Nasl. z nasl. zaslona; Opis vira z dne 6. 5. 2024;
Datum objave v DiRROS:23.05.2024
Število ogledov:621
Število prenosov:416
Metapodatki:XML DC-XML DC-RDF
:
MLADENOVIĆ NIKOLIĆ, Nataša, KLJAJEVIĆ, Ljiljana, NENADOVIĆ, Snežana B., POTOČNIK, Jelena, KNEŽEVIĆ, Sanja, DOLENEC, Sabina in TRIVUNAC, Katarina, 2024, Adsorption efficiency of cadmium (II) by different alkali-activated materials. Gels [na spletu]. 2024. Vol. 10, no. 5,  317, p. 1–23. [Dostopano 19 marec 2025]. DOI 10.3390/gels10050317. Pridobljeno s: https://dirros.openscience.si/IzpisGradiva.php?lang=slv&id=18981
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Gradivo je del revije

Naslov:Gels
Skrajšan naslov:Gels
Založnik:MDPI AG
ISSN:2310-2861
COBISS.SI-ID:525301529 Novo okno

Gradivo je financirano iz projekta

Financer:Drugi - Drug financer ali več financerjev
Številka projekta:451-03-47/2023-01/200017
Financer:Drugi - Drug financer ali več financerjev
Številka projekta:451-03-47/2023-01/200135

Licence

Licenca:CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
Povezava:http://creativecommons.org/licenses/by/4.0/deed.sl
Opis:To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

Jezik:Slovenski jezik
Ključne besede:elektrofiltrski pepel, metakaolin, lesni pepel, amorfni gel, kinetika adsorpcije, kadmij


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