| Title: | Enhanced degradation of sulfamethoxazole by a modified nano zero-valent iron with a beta-cyclodextrin polymer: Mechanism and toxicity evaluation |
| Author(s): | Krawczyk K; Silvestri D; Nguyen NHA; Sevcu A; Lukowiec D; Padil VVT; Rezanka M; Cernik M; Dionysiou DD; Waclawek S; |
| Address: | "Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, Studentska 1402/2, 461 17 Liberec 1, Czech Republic, EU. Materials Research Laboratory, Faculty of Mechanical Engineering, Silesian University of Technology, Konarskiego 18a St., 44-100 Gliwice, Poland. Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, Studentska 1402/2, 461 17 Liberec 1, Czech Republic, EU. Electronic address: miroslav.cernik@tul.cz. Environmental Engineering and Science Program, Department of Chemical and Environmental Engineering (ChEE), University of Cincinnati, Cincinnati, OH 45221-0012, USA. Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, Studentska 1402/2, 461 17 Liberec 1, Czech Republic, EU. Electronic address: stanislaw.waclawek@tul.cz" |
| DOI: | 10.1016/j.scitotenv.2021.152888 |
| ISSN/ISBN: | 1879-1026 (Electronic) 0048-9697 (Linking) |
| Abstract: | "Rising concern about emerging and already persisting pollutants in water has urged the scientific community to develop novel remedial techniques. A new group of remediation methods is based on the modification of nanoscale zero-valent iron particles (nZVI), which are well known for treating volatile organic compounds and heavy metals. The properties of nZVI may be further enhanced by modifying their structure or surface using 'green' polymers. Herein, nZVI was modified by a beta-cyclodextrin polymer (beta-CDP), which is considered an environmentally safe and inexpensive adsorbent of contaminants. This composite was used for the first time for the degradation of sulfamethoxazole (SMX). Coating by beta-CDP not only enhanced the degradation of SMX (>95%, under 10 min) by the nanoparticles in a wide pH range (3-9) and enabled their efficient reusability (for three cycles) but also made the coated nZVI less toxic to the model bioindicator microalga Raphidocelis subcapitata. Moreover, degradation products of SMX were found to be less toxic to Escherichia coli bacteria and R. subcapitata microalga, contrary to the SMX antibiotic itself, indicating a simple and eco-friendly cleaning process. This research aims to further stimulate and develop novel remedial techniques based on nZVI, and provides a potential application in the degradation of antibiotics in a wide pH range. Moreover, the wealth of available cyclodextrin materials used for surface modification may open a way to discover more efficient and attractive composites for environmental applications" |
| Keywords: | "Cellulose *Cyclodextrins Iron/chemistry *Metals, Heavy Sulfamethoxazole/toxicity *Water Pollutants, Chemical/analysis/toxicity Degradation Micropollutants Post-treatment toxicity Sulfamethoxazole Zero-valent iron beta-Cyclodextrin polymer;" |
| Notes: | "MedlineKrawczyk, Kamil Silvestri, Daniele Nguyen, Nhung H A Sevcu, Alena Lukowiec, Dariusz Padil, Vinod V T Rezanka, Michal Cernik, Miroslav Dionysiou, Dionysios D Waclawek, Stanislaw eng Netherlands 2022/01/10 Sci Total Environ. 2022 Apr 15; 817:152888. doi: 10.1016/j.scitotenv.2021.152888. Epub 2022 Jan 5" |
