Adsorptive removal of ciprofloxacin and isoniazid from aqueous solution

Dube, Cyril S; Tandlich, Roman; Wilhelmi, Brendan S

Title: Adsorptive removal of ciprofloxacin and isoniazid from aqueous solution
Creator: Dube, Cyril S
Creator: Tandlich, Roman
Creator: Wilhelmi, Brendan S
Date Issued: 2018
Date: 2018
Type: text
Type: article
Identifier: http://hdl.handle.net/10962/76846
Identifier: vital:30629
Identifier: https://doi.org/10.2478/nbec-2018-0002
Description: This paper describes study of ciprofloxacin and isoniazid removal from aqueous solutions using coal fly ash (FA), kaolinite, perlite, talc and vermiculite. The adsorptive features of the adsorbents were evaluated for ciprofloxacin and isoniazid with regards to the effects of contact time, pH, the solid/liquid ratio and antibiotic concentration. All adsorbents were sterilised by dry heat before use to avoid the proliferation of antimicrobial resistance by the bacteria present on the adsorbents during experiments. The regression correlation coefficients indicate that the Langmuir model gives the best fit for the sorption of both antibiotics onto FA and talc, ciprofloxacin onto kaolinite, and isoniazid onto perlite and vermiculite with R2 values ranging from 0.908 – 0.999. The Freundlich isotherm best describes the sorption of ciprofloxacin onto vermiculite and isoniazid onto kaolinite with R2 values of 0.999 for both. The Tempkin model best describes the sorption of ciprofloxacin onto perlite with an R2 = 0.997. The values of the Freundlich exponent, 1/n, range from 0.221 – 0.998, indicating a favourable adsorption of ciprofloxacin and isoniazid onto the adsorbents. The heat of sorption, B, calculated from the Temkin plots has values ranging from 0.018 – 10.460 J/mol, indicating a physical adsorption process (physisorption). Adsorption equilibrium was achieved after 30 min for both antibiotics and the kinetic data obtained conforms best to the pseudo-second order equation with R2 values ranging from 0.998 – 0.999. The removal of ciprofloxacin and isoniazid by all adsorbents except FA was strongly influenced by the pH suggesting that electrostatic interactions play a major role in the adsorption processes.
Format: 13 pages
Format: pdf
Language: English
Relation: Nova Biotechnologica et Chimica
Relation: Dube, C., Tandlich, R. and Wilhelmi, B., 2018. Adsorptive removal of ciprofloxacin and isoniazid from aqueous solution. Nova Biotechnologica et Chimica, 17(1), pp.16-28.
Relation: Nova Biotechnologica et Chimica volume 17 number 1 16 28 September 2018 1338-6905
Rights: Authors
Rights: Use of this resource is governed by the terms and conditions of the Sciendo statement (https://www.sciendo.com/about-us)

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Tandlich, Roman (Dr)

Wilhelmi, Brendan (Dr)

RU Department of Pharmacy

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