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Adsorption of Sulfonamide Antibiotics to Multiwalled Carbon Nanotubes
Abstract
The presence of sulfonamide antibiotics in aquatic environments has been recognized as an issue warranting consideration. In this study, we evaluated multiwalled carbon nanotubes (MWNT) as a potential effective adsorbent for removal of two sulfonamide antibiotics, sulfapyridine and sulfamethoxazole, from aqueous solutions. Nonporous, functionality-free graphite was included as a comparative adsorbent. Despite the very low hydrophobicity, the two sulfonamides adsorbed strongly to MWNT and graphite, a fact attributed to pi-pi electron coupling with the graphene surface of the adsorbent. For both sulfonamide antibiotics, similar patterns of pH-dependent adsorption were observed between MWNT and graphite, implying the predominance of graphene structures for the adsorption to MWNT. Moreover, the observed pH effects on adsorption indicate that the protonated neutral form of sulfonamide adsorbs much more strongly than the deprotonated anionic counterpart does. The effects of ionic strength (NaCl and CaCl2) and the presence of a dissolved soil humic acid on adsorption of the two antibiotics to MWNT and graphite were also assessed. Ring current-induced 1H NMR upfield chemical shifts further verified face-to-face complex formation between neutral sulfamethoxazole and model pi-electron donor compounds (naphthalene, phenanthrene, and pyrene) in solution.
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Göbel, A., Thomsen, A., McArdell, C. S., Joss, A., & Giger, W. (2005) · Environmental Science & Technology · doi:10.1021/es048550a · Cited by 760
Zhu, D., & Pignatello, J. J. (2005) · Environmental Science & Technology · doi:10.1021/es0491376 · Cited by 425
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Cited by
Adsorptive removal of antibiotics from water and wastewater: Progress and challenges
Ahmed, M. B., Zhou, J. L., Ngo, H. H., & Guo, W. (2015) · Science of The Total Environment · doi:10.1016/j.scitotenv.2015.05.130 · Cited by 1,207
Removal of methylene blue from aqueous solution by graphene oxide
Yang, S.-T., Chen, S., Chang, Y., Cao, A., Liu, Y., & Wang, H. (2011) · Journal of Colloid and Interface Science · doi:10.1016/j.jcis.2011.02.064 · Cited by 690
Nanocatalysts and other nanomaterials for water remediation from organic pollutants
Lu, F., & Astruc, D. (2020) · Coordination Chemistry Reviews · doi:10.1016/j.ccr.2020.213180 · Cited by 682
Peiris, C., Gunatilake, S. R., Mlsna, T. E., Mohan, D., & Vithanage, M. (2017) · Bioresource Technology · doi:10.1016/j.biortech.2017.07.150 · Cited by 604
Enhanced sulfamethazine removal by steam-activated invasive plant-derived biochar
Rajapaksha, A. U., Vithanage, M., Ahmad, M., Seo, D.-C., Cho, J.-S., Lee, S.-E., Lee, S. S., & Ok, Y. S. (2015) · Journal of Hazardous Materials · doi:10.1016/j.jhazmat.2015.02.046 · Cited by 398
Metadata
- Authors
- Ji, L., Chen, W., Zheng, S., Xu, Z., & Zhu, D.
- Venue
- Langmuir
- Publisher
- American Chemical Society (ACS)
- Published
- 2009-09-03
- Volume
- 25
- Issue
- 19
- Pages
- 11608-11613
- ISSN
- 0743-7463 (ISSN-L)
- 1520-5827
- OpenAlex
- W1967770098
- Cited by
- 345
- References
- 2
- FWCI
- 11.87
- Type
- journal article
- Language
- en
- Open access
- closed
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