Publication Details |
| Category | Text Publication |
| Reference Category | Journals |
| DOI | 10.1007/s11356-017-8491-x |
| Document | Shareable Link |
| Title (Primary) | Removal of gadolinium-based contrast agents: adsorption on activated carbon |
| Author | Elizalde-González, M.P.; García-Díaz, E.; González-Perea, M.; Mattusch, J. |
| Source Titel | Environmental Science and Pollution Research |
| Year | 2017 |
| Department | ANA |
| Volume | 24 |
| Issue | 9 |
| Page From | 8164 |
| Page To | 8175 |
| Language | englisch |
| Keywords | Gadolinium-based contrast agents; Adsorption; Activated carbon; Model urine; Emerging water pollutants |
| UFZ wide themes | RU4; |
| Abstract | Three carbon samples were employed in this work, including commercial (1690 m2 g−1), activated carbon prepared from guava seeds (637 m2 g−1), and activated carbon prepared from avocado kernel (1068 m2 g−1), to study the adsorption of the following gadolinium-based contrast agents (GBCAs): gadoterate meglumine Dotarem®, gadopentetate dimeglumine Magnevist®, and gadoxetate disodium Primovist®. The activation conditions with H3PO4 were optimized using a Taguchi methodology to obtain mesoporous materials. The best removal efficiency by square meter in a batch system in aqueous solution and model urine was achieved by avocado kernel carbon, in which mesoporosity prevails over microporosity. The kinetic adsorption curves were described by a pseudo-second-order equation, and the adsorption isotherms in the concentration range 0.5–6 mM fit the Freundlich equation. The chemical characterization of the surfaces shows that materials with a greater amount of phenolic functional groups adsorb the GBCA better. Adsorption strongly depends on the pH due to the combination of the following factors: contrast agent protonated forms and carbon surface charge. The tested carbon samples were able to adsorb 70–90% of GBCA in aqueous solution and less in model urine. This research proposes a method for the elimination of GBCA from patient urine before its discharge into wastewater. |
| Persistent UFZ Identifier | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=18666 |
| Elizalde-González, M.P., García-Díaz, E., González-Perea, M., Mattusch, J. (2017): Removal of gadolinium-based contrast agents: adsorption on activated carbon Environ. Sci. Pollut. Res. 24 (9), 8164 - 8175 10.1007/s11356-017-8491-x |
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