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Hydrophilic, hollow Fe3O4@PDA spheres with a storage cavity for efficient removal of polycyclic structured tetracycline.
- Source :
-
New Journal of Chemistry . 1/30/2017, Vol. 41 Issue 3, p1235-1244. 10p. - Publication Year :
- 2017
-
Abstract
- Antibiotics are emerging pollutants in aquatic ecosystems and there is much recent interest in their removal from water systems. However, the development of efficient sorbents for handling this problem remains a challenge. Herein, we report biomimetic hydrophilic, hollow polydopamine (PDA)-based composites of Fe3O4@PDA that were synthesized by a facile oxidation polymerization route. In order to assess the feasibility of Fe3O4@PDA hollow spheres as a potential sorbent for antibiotic removal, a series of adsorption experiments were conducted using tetracycline (TC) as the model antibiotic molecule. In contrast to the non-hollow counterpart of PS@Fe3O4@PDA, the designed Fe3O4@PDA hollow spheres exhibited much enhanced adsorption in removing TC at pH values from 2 to 10. The adsorption of TC onto Fe3O4@PDA hollow spheres fit a pseudo-second-order kinetics model, and the maximum adsorption capacity was 151.7 mg g−1 calculated from a Langmuir isotherm model at pH = 8. After adsorption, the Fe3O4@PDA hollow spheres could be quickly recovered from the TC solution due to the room-temperature paramagnetic property of Fe3O4 nanoparticles that were pre-loaded into the interior surface of hollow PDA shells. The combination of excellent adsorption capacity, good reusability and high stability, together with a mild preparation procedure enables these types of hollow composites to have potential applications in specific fields. [ABSTRACT FROM AUTHOR]
- Subjects :
- *HYDROPHILIC interactions
*IRON oxides
*TETRACYCLINE
Subjects
Details
- Language :
- English
- ISSN :
- 11440546
- Volume :
- 41
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- New Journal of Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 121025286
- Full Text :
- https://doi.org/10.1039/c6nj03314h