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Evaluation of the efficacy of Fe2O3 magnetised kaolin: Simultaneous removal of ceftriaxone and cefixime from aqueous media

Naghipour, D, Taghavi, K, Jaafari, J, Hashim, KS, Javan Mahjoub Doust, F and Mahjoub Doust, MJ (2022) Evaluation of the efficacy of Fe2O3 magnetised kaolin: Simultaneous removal of ceftriaxone and cefixime from aqueous media. International Journal of Environmental Analytical Chemistry. pp. 1-18. ISSN 0306-7319

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Traces of antibiotics in domestic and industrial effluents have toxic effects on human health and the surrounding plants and animals, besides their potential to increase antibiotic resistance of microorganisms. Therefore, this study aims to develop a new adsorbent made from kaolin magnetised with Fe2O3 (Kaolin- Fe2O3) composite and apply it to remove ceftriaxone and cefixime from aqueous solutions. The efficiency of the new adsorbent in removing ceftriaxone and cefixime from solutions was studied under different adsorbent doses, antibiotic concentrations, solution pH values, and contact times. The results indicated the best ceftriaxone and Cefixime removal was attained at pH of 5 and 3, respectively, while the best antibiotic concentration, contact time, and adsorbent dose were 20 mg/L, 60 min, and 0.4 g/250 cc, respectively. It was noticed the adsorption was improved at low temperatures (25 (Formula presented.) for ceftriaxone and 35 (Formula presented.) for cefixime). Five types of isotherms matched the equilibrium data, including Langmuir, Freundlich, Temkin, Redlich-Peterson, and Sips. Equilibrium data were also matched with pseudo-first and second-order kinetics, Elovich, and intraparticle diffusion. Freundlich and Sips isotherm models were more consistent with equilibrium data. The positive results of Gibbs free energy and the negative enthalpy obtained from thermodynamic parameters indicate that the adsorption process is spontaneous and the adsorption process is exothermic. In light of the obtained results, the Kaolin-Fe2O3 nanocomposites could be considered an effective and inexpensive adsorbent for removing antibiotics from aqueous solutions.

Item Type: Article
Additional Information: “This is an Accepted Manuscript of an article published by Taylor & Francis in International Journal of Environmental Analytical Chemistry on 31/08/2022, available at: http://www.tandfonline.com/10.1080/03067319.2022.2115899
Uncontrolled Keywords: 0301 Analytical Chemistry; 0399 Other Chemical Sciences; 0502 Environmental Science and Management; Analytical Chemistry
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TP Chemical technology
Divisions: Civil Engineering & Built Environment
Publisher: Taylor and Francis Group
SWORD Depositor: A Symplectic
Date Deposited: 20 Oct 2022 10:21
Last Modified: 31 Aug 2023 00:50
DOI or ID number: 10.1080/03067319.2022.2115899
URI: https://researchonline.ljmu.ac.uk/id/eprint/17907
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