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Laguta AN, Mchedlov-Petrossyan NO, Bogatyrenko SI, Kovalenko SM, Bunyatyan ND, Trostianko PV, Karbivskii VL, Filatov DY. Interaction of aqueous suspensions of single-walled oxidized carbon nanotubes with inorganic and organic electrolytes. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.117948] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Thermodynamics of multi-walled carbon nanotube biofunctionalization using nisin: The effect of peptide structure. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.123611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Zhang X, Song K, Liu J, Zhang Z, Wang C, Li H. Sorption of triclosan by carbon nanotubes in dispersion: The importance of dispersing properties using different surfactants. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2018.11.037] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Li H, Wu W, Hao X, Wang S, You M, Han X, Zhao Q, Xing B. Removal of ciprofloxacin from aqueous solutions by ionic surfactant-modified carbon nanotubes. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 243:206-217. [PMID: 30172990 DOI: 10.1016/j.envpol.2018.08.059] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 08/04/2018] [Accepted: 08/19/2018] [Indexed: 06/08/2023]
Abstract
Ionic surfactants may impact removal efficiency of organic contaminants from aqueous solution, but research regarding the adsorption mechanisms on surfactant-modified carbon nanotubes (CNTs) was limited. In this study, three multi-walled and one single-walled CNTs were used as adsorbents to investigate the adsorption behavior and mechanisms of ciprofloxacin (CIP) on CNTs modified by ionic surfactants (cationic CTAB (Cetyltrimethylamnonium bromide) or anionic SDS (Sodium dodecyl sulfate)). More than 80% (82-88%) of the total removed CIP on CTAB-modified CNTs occurred within the first 6 h, much higher than that on SDS-modified CNTs (57-78%). Modeling adsorption kinetics demonstrated that CIP adsorption on surfactant-modified CNTs was controlled by multiple and faster processes, and both external mass transfer and intraparticle diffusion are limiting factors. Relative to SDS, CTAB was significantly (P < 0.001) concentration-dependent in suppressing CIP removal. Besides, the increase in 1/n values of Freundlich model with increasing CTAB concentration suggested that CTAB could be a stronger competitor for CIP adsorption. Hydrophobic interactions predominated zwitterionic CIP adsorption on all CNTs tested, while electrostatic interactions could help control ionizable CIP adsorption on surfactant-modified CNTs depending upon pH. CIP adsorption on modified SWCNTs significantly declined with increasing ionic strength from 1 mM to 100 mM relative to those multi-walled CNTs because the more favorable aggregation of SWCNTs reduced the CIP adsorption, irrespective of which surfactant was added. Significant desorption hysteresis of adsorbed CIP released by SDS and water was observed, but not by CTAB, by which 32.6-54.4% of adsorbed CIP were removed. For SDS-modified CNTs, the mean release ratio (RR) followed an order of MWCNTs (0.075) > MHCNTs (0.058) > SWCNTs (0.057) > MCCNTs (0.049), significantly (P < 0.001) lower than CTAB-CNTs (0.37-0.56). It can be predicted that the tested surfactants co-existing with CNTs depress removal efficiency of diverse contaminants similar to CIP in aqueous systems.
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Affiliation(s)
- Haibo Li
- School of Agriculture, Jilin University of Agricultural Science & Technology, Jilin, 132101, China; Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA, 01003, USA; National Field Research Station of Agro-ecosystem in Hailun, Northeast Institute of Geography and Agro-ecology, Chinese Academy of Sciences, Harbin, 150081, China
| | - Wenhao Wu
- Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA, 01003, USA
| | - Xiangxiang Hao
- National Field Research Station of Agro-ecosystem in Hailun, Northeast Institute of Geography and Agro-ecology, Chinese Academy of Sciences, Harbin, 150081, China
| | - Shuai Wang
- School of Agriculture, Jilin University of Agricultural Science & Technology, Jilin, 132101, China
| | - Mengyang You
- National Field Research Station of Agro-ecosystem in Hailun, Northeast Institute of Geography and Agro-ecology, Chinese Academy of Sciences, Harbin, 150081, China
| | - Xiaozeng Han
- National Field Research Station of Agro-ecosystem in Hailun, Northeast Institute of Geography and Agro-ecology, Chinese Academy of Sciences, Harbin, 150081, China
| | - Qing Zhao
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China
| | - Baoshan Xing
- Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA, 01003, USA.
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