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231225s2019 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.9b02431
|2 doi
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|a pubmed24n1003.xml
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|a (DE-627)NLM301040982
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|a (NLM)31495173
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|a DE-627
|b ger
|c DE-627
|e rakwb
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| 041 |
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|a eng
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| 100 |
1 |
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|a Ghosh, Rajesh
|e verfasserin
|4 aut
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| 245 |
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|a Adsorption of Fluoroquinolone Antibiotics at the Gas-Liquid Interface Using Ionic Surfactants
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|c 2019
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Completed 31.08.2020
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|a Date Revised 31.08.2020
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a The overuse of antibiotics in today's society has resulted in high concentrations of pharmaceutical contaminants in the natural environment. In this work, we investigated the surfactant-mediated adsorption of fluoroquinolone (FQ) antibiotics at the gas-liquid interface and their separation using a semi-batch foam fractionation process. FQs being a zwitterionic compound have an affinity to bind with both cationic and anionic surfactants. The adsorption of FQs to the gas-liquid interface was investigated using a cationic cetyltrimethylammonium bromide (CTAB) and anionic sodium dodecyl sulfate (SDS) surfactant. Ciprofloxacin (CF) was chosen as a model FQ antibiotic. The adsorption properties of the surfactant systems and CF were characterized using pendant-drop tensiometry and surface excess analysis. It was found that CF partitions to the gas-liquid interface more readily in the presence of SDS compared to CTAB. This was also corroborated in the foam fractionation experiments. At optimum operating conditions, CF showed a higher removal efficiency with SDS (96.3%) compared to CTAB (52%). In spite of strong molecular interactions between CTAB and CF, the preferential adsorption of DS--CF complexes was far greater than CTA+-CF complexes. At optimized operating conditions, using SDS as the surfactant, other FQs such as norfloxacin, levofloxacin, and ofloxacin were recovered up to 97.9, 91.7, and 96.7%, respectively, with effluent concentration less than 100 nM. Overall, the work demonstrates foam fractionation as a novel and environment-friendly gas-liquid separation technique for the targeted removal of FQ antibiotics from waterbodies
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Anti-Bacterial Agents
|2 NLM
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|a Fluoroquinolones
|2 NLM
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|a Gases
|2 NLM
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|a Surface-Active Agents
|2 NLM
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|a Sodium Dodecyl Sulfate
|2 NLM
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|a 368GB5141J
|2 NLM
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| 650 |
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|a Ciprofloxacin
|2 NLM
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| 650 |
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|a 5E8K9I0O4U
|2 NLM
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| 650 |
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|a Cetrimonium
|2 NLM
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| 650 |
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|a Z7FF1XKL7A
|2 NLM
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| 700 |
1 |
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|a Hareendran, Haritha
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Subramaniam, Pushpavanam
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1999
|g 35(2019), 39 vom: 01. Okt., Seite 12839-12850
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
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|g volume:35
|g year:2019
|g number:39
|g day:01
|g month:10
|g pages:12839-12850
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|u http://dx.doi.org/10.1021/acs.langmuir.9b02431
|3 Volltext
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