Back to Search
Start Over
Study on the efficiency of a covalent organic framework as adsorbent for the screening of pharmaceuticals in estuary waters
- Source :
- Chemosphere. 278:130364
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- Herein, we demonstrate, for the first time, that covalent organic frameworks (COFs) can be efficient adsorbents for the screening of pharmaceuticals in real water samples, obtaining highly representative data on their occurrence and avoiding the cost of carrying high volume samples and tedious and costly clean-up and preconcentration steps. Of the 23 pharmaceuticals found present in the water samples from the Tagus river estuary using state-of-the-art solid-phase extraction (SPE), 22 were also detected (adsorbed and recovered for analysis) using a COF as the adsorbent material with adsorption efficiency of over 80% for nearly all compounds. In specific cases, acidification of the water samples was identified to lead to a dramatic loss of adsorption efficiency, underlining the effect of sample pre-treatment on the results. The COF efficiently adsorbed (>80%) 19 pharmaceuticals without acid treatment of the sample, highlighting the potential of this class of materials for representative in situ passive adsorption of pharmaceuticals, making this material suitable for being used in water monitoring programs as a simple and cost-efficient sample preparation procedure. In the case of α-hydroxyalprazolam and diclofenac, the COF outperformed the SPE procedure in the recovery efficiency. Although further efforts should be made in tailoring the desorption of the pharmaceuticals from the COF by using different solvents or solvent mixtures, we propose COFs as convenient adsorbent for broad-scope screening and as an efficient adsorbent material to target specific classes of pharmaceuticals. To the best of our knowledge, this is the first study on the use of COFs for contaminant screening in real, naturally contaminated water samples.
- Subjects :
- Environmental Engineering
Health, Toxicology and Mutagenesis
0208 environmental biotechnology
02 engineering and technology
010501 environmental sciences
01 natural sciences
Adsorption
Desorption
Environmental Chemistry
Sample preparation
Metal-Organic Frameworks
0105 earth and related environmental sciences
Chemistry
Solid Phase Extraction
Extraction (chemistry)
Public Health, Environmental and Occupational Health
General Medicine
General Chemistry
Pollution
020801 environmental engineering
Contaminated water
Solvent
Pharmaceutical Preparations
Environmental chemistry
Acid treatment
Estuaries
Covalent organic framework
Subjects
Details
- ISSN :
- 00456535
- Volume :
- 278
- Database :
- OpenAIRE
- Journal :
- Chemosphere
- Accession number :
- edsair.doi.dedup.....8a6dc139e5cdffb21c3c756148bf3c52