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Article

Removal of Toxic Copper Ion from Aqueous Media by Adsorption on Fly Ash-Derived Zeolites: Kinetic and Equilibrium Studies

1
National Institute of Research and Development for Technical Physics, 47 Mangeron Boulevard, 700050 Iasi, Romania
2
Faculty of Chemical Engineering and Environmental Protection, “Gheorghe Asachi” Technical University of Iasi, 73 Prof.dr.doc. Dimitrie Mangeron Street, 700050 Iasi, Romania
*
Author to whom correspondence should be addressed.
Academic Editor: Tetyana Budnyak
Polymers 2021, 13(20), 3468; https://doi.org/10.3390/polym13203468
Received: 20 September 2021 / Revised: 5 October 2021 / Accepted: 6 October 2021 / Published: 9 October 2021
(This article belongs to the Special Issue Functional Adsorbents)
This study investigated the adsorption capacity of one material based on the treatment of fly ash with sodium hydroxide as a novel adsorbent for toxic Cu2+ ion removal from aqueous media. The adsorbent was obtained through direct activation of fly ash with 2M NaOH at 90 °C and 6 h of contact time. The adsorbent was characterized by recognized techniques for solid samples. The influence of adsorption parameters such as adsorbent dose, copper initial concentration and contact time was analyzed in order to establish the best adsorption conditions. The results revealed that the Langmuir model fitted with the copper adsorption data. The maximum copper adsorption capacity was 53.5 mg/g. The adsorption process followed the pseudo-second-order kinetic model. The results indicated that the mechanism of adsorption was chemisorption. The results also showed the copper ion removal efficiencies of the synthesized adsorbents. The proposed procedure is an innovative and economical method, which can be used for toxicity reduction by capitalizing on abundant solid waste and treatment wastewater. View Full-Text
Keywords: copper adsorption; fly ash; NaOH treatment; zeolite copper adsorption; fly ash; NaOH treatment; zeolite
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MDPI and ACS Style

Buema, G.; Trifas, L.-M.; Harja, M. Removal of Toxic Copper Ion from Aqueous Media by Adsorption on Fly Ash-Derived Zeolites: Kinetic and Equilibrium Studies. Polymers 2021, 13, 3468. https://doi.org/10.3390/polym13203468

AMA Style

Buema G, Trifas L-M, Harja M. Removal of Toxic Copper Ion from Aqueous Media by Adsorption on Fly Ash-Derived Zeolites: Kinetic and Equilibrium Studies. Polymers. 2021; 13(20):3468. https://doi.org/10.3390/polym13203468

Chicago/Turabian Style

Buema, Gabriela, Luisa-Maria Trifas, and Maria Harja. 2021. "Removal of Toxic Copper Ion from Aqueous Media by Adsorption on Fly Ash-Derived Zeolites: Kinetic and Equilibrium Studies" Polymers 13, no. 20: 3468. https://doi.org/10.3390/polym13203468

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