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Modified Single-Walled Carbon Nanotube Membranes for the Elimination of Antibiotics from Water.
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SYSNO ASEP 0545698 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Modified Single-Walled Carbon Nanotube Membranes for the Elimination of Antibiotics from Water. Author(s) Gaálová, Jana (UCHP-M) RID, SAI, ORCID
Bourassi, Mahdi (UCHP-M) ORCID, RID, SAI
Soukup, Karel (UCHP-M) RID, SAI, ORCID
Trávníčková, Tereza (UCHP-M) RID, ORCID, SAI
Bouša, D. (CZ)
Sundararajan, S. (IL)
Losada, O. (CZ)
Kasher, R. (IL)
Friess, K. (CZ)
Sofer, Z. (CZ)Article number 720 Source Title Membranes. - : MDPI
Roč. 11, č. 9 (2021)Number of pages 29 s. Language eng - English Country CH - Switzerland Keywords carbon nanotube ; membranes ; polymer Subject RIV CI - Industrial Chemistry, Chemical Engineering OECD category Chemical process engineering R&D Projects GJ19-08153Y GA ČR - Czech Science Foundation (CSF) Method of publishing Open access Institutional support UCHP-M - RVO:67985858 UT WOS 000700715700001 EID SCOPUS 85115863952 DOI 10.3390/membranes11090720 Annotation The hydrophilic and hydrophobic single-walled carbon nanotube membranes were prepared and progressively applied in sorption, filtration, and pertraction experiments with the aim of eliminating three antibiotics—tetracycline, sulfamethoxazole, and trimethoprim—as a single pollutant or as a mixture. The addition of SiO2 to the single-walled carbon nanotubes allowed a transparent study of the influence of porosity on the separation processes. The mild oxidation, increasing hydrophilicity, and reactivity of the single-walled carbon nanotube membranes with the pollutants were suitable for the filtration and sorption process, while non-oxidized materials with a hydrophobic layer were more appropriate for pertraction. The total pore volume increased with an increasing amount of SiO2 (from 743 to 1218 mm3/g) in the hydrophilic membranes. The hydrophobic layer completely covered the carbon nanotubes and SiO2 nanoparticles and provided significantly different membrane surface interactions with the antibiotics. Single-walled carbon nanotubes adsorbed the initial amount of antibiotics in less than 5 h. A time of 2.3 s was sufficient for the filtration of 98.8% of sulfamethoxazole, 95.5% of trimethoprim, and 87.0% of tetracycline. The thicker membranes demonstrate a higher adsorption capacity. However, the pertraction was slower than filtration, leading to total elimination of antibiotics (e.g., 3 days for tetracycline). The diffusion coefficient of the antibiotics varies between 0.7–2.7 × 10−10, depending on the addition of SiO2 in perfect agreement with the findings of the textural analysis and scanning electron microscopy observations. Similar to filtration, tetracycline is retained by the membranes more than sulfamethoxazole and trimethoprim. Workplace Institute of Chemical Process Fundamentals Contact Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Year of Publishing 2022 Electronic address https://www.mdpi.com/2077-0375/11/9/720
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