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Biomass against emerging pollution in wastewater: ability of cork for the removal of ofloxacin from aqueous solutions at different pH

Crespo-Alonso, Miriam and Nurchi, Valeria Marina and Biesuz, Raffaela and Alberti, Giancarla and Spano, Nadia and Pilo, Maria Itria and Sanna, Gavino (2013) Biomass against emerging pollution in wastewater: ability of cork for the removal of ofloxacin from aqueous solutions at different pH. Journal of environmental chemical engineering, Vol. 1 (4), p. 1199-1204. eISSN 2213-3437. Article.

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DOI: 10.1016/j.jece.2013.09.010

Abstract

A wide range of substances is reported in the literature as emerging pollutants. Biomass sorption has been found an effective way to remove these pollutants from wastewaters. In this work the ability of cork for the removal of ofloxacin from aqueous solutions has been evaluated. Cork and ofloxacin have been chosen as representative of biomass and of antibiotics, respectively. Ofloxacin is one of the most used fluoroquinolones, a potent broad spectrum oral antibiotic class.
The sorption of ofloxacin by cork has been studied by equilibrium isotherms at three pH values (4, 7 and 9) using cork of two different sizes. The K and Qmax values obtained by fitting the data with Langmuir equation are discussed as a function of pH and cork size.
In order to know the variously protonated species of ofloxacin that interact with cork at different pH, a potentiometric–spectrophotometric characterization of the protonation equilibria has been performed.
A new spectrophotometric method for the quantitative determination of ofloxacin, based on the formation of colored iron(III) complexes, has been developed.

Item Type:Article
ID Code:9791
Status:Published
Refereed:Yes
Uncontrolled Keywords:Biomass, langmuir isotherm, ofloxacin, protonation constant, sorption
Subjects:Area 03 - Scienze chimiche > CHIM/01 Chimica analitica
Divisions:001 Università di Sassari > 01-a Nuovi Dipartimenti dal 2012 > Chimica e Farmacia
Publisher:Elsevier
eISSN:2213-3437
Deposited On:12 May 2014 08:49

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