4.7 Article

Study on the efficiency of a covalent organic framework as adsorbent for the screening of pharmaceuticals in estuary waters

期刊

CHEMOSPHERE
卷 278, 期 -, 页码 -

出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2021.130364

关键词

Covalent organic frameworks (COFs); Pharmaceutical pollutants; Adsorption; Water

资金

  1. FCT Fundacao para a Ciencia e Tecnologia [SFRH/BD/131791/2017]
  2. Xunta de Galicia [ED481B 2017/033]
  3. FCT [UIDB/04292/2020, SFRH/BD/138376/2018, SFRH/BPD/95784/2013]
  4. FCT at FCUL [DL57/2016/CP1479/CT0024]
  5. Fundação para a Ciência e a Tecnologia [SFRH/BD/138376/2018, SFRH/BD/131791/2017] Funding Source: FCT

向作者/读者索取更多资源

This study demonstrates the efficient adsorption of pharmaceuticals in water samples using COFs, providing highly representative data. COFs show potential as convenient adsorbents for water monitoring programs and targeting specific classes of pharmaceuticals.
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 alpha-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. (C) 2021 Published by Elsevier Ltd.

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