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Adsorption of bisphenol A and ciprofloxacin by palygorskite-montmorillonite: Effect of granule size, solution chemistry and temperature
AbstractAdsorption and desorption studies of the endocrine-disrupting compound, bisphenol A (BPA), and the antibiotic ciprofloxacin (CIP) with palygorskite-montmorillonite (Pal-Mt) granules (0.3–0.6mm, 1.7–2.0mm and ≈2.8mm), were done as a function of solution chemistry, temperature, and particle size. The data best fit the Langmuir adsorption model with the smallest and the largest granule sizes, respectively, exhibiting the highest (in mgkg−1, qm=77.3 for BPA; qm=107,000 for CIP) and the lowest (qm=41.0 for BPA; qm=81,000 for CIP) adsorption capacities. CIP adsorption was strongly pH dependent, while BPA adsorption was slightly pH and ionic strength dependent. Thermodynamic parameters indicated BPA and CIP adsorption were spontaneous. Net-adsorption-desorption hysteresis were indicative of irreversible adsorption. FTIR and thermogravimetric analysis (TGA) data corroborate the mechanisms and the level of adsorption for CIP but not for BPA. The smallest and the medium granule sizes, respectively, are appropriate for potential BPA and CIP removal.Capsule abstractBPA and CIP adsorption-desorption data was granule size, experimental pH, ionic strength, and temperature dependent. Adsorption-desorption hysteresis indicated irreversible adsorption.
Graphical abstract
HighlightsBPA and CIP adsorption-desorption data better fitted the Langmuir adsorption model.Adsorption was granule-size dependent with adsorption hysteresis.CIP adsorption varies with pH but pH and ionic strength had no significant effect on BPA adsorption.Both BPA and CIP adsorption were spontaneous; and exothermic and endothermic, respectively.The smallest and the medium granule sizes, respectively, are appropriate for BPA and CIP removal.
Adsorption of bisphenol A and ciprofloxacin by palygorskite-montmorillonite: Effect of granule size, solution chemistry and temperature
AbstractAdsorption and desorption studies of the endocrine-disrupting compound, bisphenol A (BPA), and the antibiotic ciprofloxacin (CIP) with palygorskite-montmorillonite (Pal-Mt) granules (0.3–0.6mm, 1.7–2.0mm and ≈2.8mm), were done as a function of solution chemistry, temperature, and particle size. The data best fit the Langmuir adsorption model with the smallest and the largest granule sizes, respectively, exhibiting the highest (in mgkg−1, qm=77.3 for BPA; qm=107,000 for CIP) and the lowest (qm=41.0 for BPA; qm=81,000 for CIP) adsorption capacities. CIP adsorption was strongly pH dependent, while BPA adsorption was slightly pH and ionic strength dependent. Thermodynamic parameters indicated BPA and CIP adsorption were spontaneous. Net-adsorption-desorption hysteresis were indicative of irreversible adsorption. FTIR and thermogravimetric analysis (TGA) data corroborate the mechanisms and the level of adsorption for CIP but not for BPA. The smallest and the medium granule sizes, respectively, are appropriate for potential BPA and CIP removal.Capsule abstractBPA and CIP adsorption-desorption data was granule size, experimental pH, ionic strength, and temperature dependent. Adsorption-desorption hysteresis indicated irreversible adsorption.
Graphical abstract
HighlightsBPA and CIP adsorption-desorption data better fitted the Langmuir adsorption model.Adsorption was granule-size dependent with adsorption hysteresis.CIP adsorption varies with pH but pH and ionic strength had no significant effect on BPA adsorption.Both BPA and CIP adsorption were spontaneous; and exothermic and endothermic, respectively.The smallest and the medium granule sizes, respectively, are appropriate for BPA and CIP removal.
Adsorption of bisphenol A and ciprofloxacin by palygorskite-montmorillonite: Effect of granule size, solution chemistry and temperature
Berhane, Tedros M. (author) / Levy, Jonathan (author) / Krekeler, Mark P.S. (author) / Danielson, Neil D. (author)
Applied Clay Science ; 132-133 ; 518-527
2016-07-25
10 pages
Article (Journal)
Electronic Resource
English
Adsorption and intercalation of ciprofloxacin on montmorillonite
| Online Contents | 2010
Adsorption and intercalation of ciprofloxacin on montmorillonite
| Elsevier | 2010