Sorptive removal of enrofloxacin antibiotic from aqueous solution using a ligno-cellulosic substrate from wheat bran
| Autor: | Marta Ortenbach-López, Emmanuel Guillon, Stéphanie Sayen |
|---|---|
| Přispěvatelé: | Institut de Chimie Moléculaire de Reims - UMR 7312 (ICMR), SFR Condorcet, Université de Reims Champagne-Ardenne (URCA)-Université de Picardie Jules Verne (UPJV)-Centre National de la Recherche Scientifique (CNRS)-Université de Reims Champagne-Ardenne (URCA)-Université de Picardie Jules Verne (UPJV)-Centre National de la Recherche Scientifique (CNRS)-SFR CAP Santé (Champagne-Ardenne Picardie Santé), Université de Reims Champagne-Ardenne (URCA)-Université de Picardie Jules Verne (UPJV)-Université de Reims Champagne-Ardenne (URCA)-Université de Picardie Jules Verne (UPJV)-Université de Reims Champagne-Ardenne (URCA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2018 |
| Předmět: |
Langmuir
Kinetics 02 engineering and technology [CHIM.INOR]Chemical Sciences/Inorganic chemistry 010501 environmental sciences 01 natural sciences Water remediation Adsorption Enrofloxacin medicine Chemical Engineering (miscellaneous) [CHIM.COOR]Chemical Sciences/Coordination chemistry Freundlich equation [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Waste Management and Disposal 0105 earth and related environmental sciences Aqueous solution Chemistry Process Chemistry and Technology Substrate (chemistry) Sorption 021001 nanoscience & nanotechnology Pollution Emerging contaminant Pharmaceutical Low-cost sorbent 0210 nano-technology Nuclear chemistry medicine.drug |
| Zdroj: | Journal of Environmental Chemical Engineering Journal of Environmental Chemical Engineering, Elsevier, 2018, 6 (5), pp.5820-5829. ⟨10.1016/j.jece.2018.08.012⟩ |
| ISSN: | 2213-3437 |
| DOI: | 10.1016/j.jece.2018.08.012 |
| Popis: | International audience; In this study, the sorption properties of a ligno-cellulosic substrate derived from wheat bran, an agricultural by-product, were investigated in order to test its ability to remove enrofloxacin fluoroquinolone antibiotic from water. The influence of contact time, pH and concentration was studied. The pH value played an important role in the adsorption process, evidencing different sorption processes as a function of pH. The results showed that the substrate removed 100% of enrofloxacin at pH 6 in less than one hour and more than 80% above pH 4. Three kinetic (pseudo-first order, pseudo-second order and intra-particle diffusion) and three isotherm (Langmuir, Freundlich and Sips) models were tested at pH 3.7 and 6. The kinetics followed the pseudo second-order model at both pH with a higher constant rate k2 at higher pH (3.88 g mg−1 h−1 at pH 6). The slower kinetics at pH 3.7 was due to intra-particle diffusion. The isotherm best fit obtained with Sips model indicated a heterogeneous monolayer adsorption of the antibiotic with a high maximum adsorption capacity of 91.5 mg g−1 at pH 6. The tested ligno-cellulosic substrate has emerged as a very good low-cost candidate for enrofloxacin adsorption both in terms of adsorbed amounts and of adsorption kinetics, compared to other adsorbents proposed for enrofloxacin removal. |
| Databáze: | OpenAIRE |
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