4.7 Article

Selective diffusive gradients in thin-films with molecularly imprinted polymer for fluoroquinolone antibiotics in waters

Journal

SCIENCE OF THE TOTAL ENVIRONMENT
Volume 790, Issue -, Pages -

Publisher

ELSEVIER
DOI: 10.1016/j.scitotenv.2021.148194

Keywords

Fluoroquinolones (FQs); Passive sampling technique; Diffusive gradients in thin films technique (DGT); Molecularly imprinted polymer (MIP); Full-factorial design; Aquatic environment

Funding

  1. Guangzhou Municipal Science and Technology Project [201904010291]
  2. Key Deployment Project of Centre for Ocean Mega-Research of Science, Chinese Academy of Sciences [COMS2019J08]
  3. Start-up Funding of Outstanding Young Scientist from SCNU
  4. National Natural Science Foundation of China [21806042]
  5. Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety [2019B030301008]

Ask authors/readers for more resources

The developed MIP-DGT sampler is capable of selectively measuring FQs in waters, showing selective adsorption and linear accumulation of FQs over time. The influence of DOM on MIP-DGT measurements is significant, but correlations with grab sampling results indicate the reliability of MIP-DGT measurements.
Fluoroquinolones (FQs) have raised significant concerns due to their ubiquitous occurrence and promoting of antimicrobial resistance (AMR). In this study, a molecularly imprinted polymer-diffusive gradient in thin-films (MIP-DGT) sampler is developed for selective measurement of FQs in waters by using a commercial available MIP material as the binding agent. The MIP-DGT shows selective adsorption of the FQs and linearly accumulates the FQs over the deployment time. MIP-DGT measurement is independent of pH (6-8) and ionic strength (IS) (0.01-0.5 M) but is affected by DOM at higher concentrations (similar to 10 mg.L-1), which is due to the altered diffusion coefficients and reduced adsorption on the MIP binding gel. Significant interaction effects of DOM with pH or IS indicate that this is the predominant influence on the MIP-DGT performance, which results in a lower measurement by the MIP-DGT but this is curtailed to some extend with increasing IS or pH. The MIP-DGT measurements, however, correlate well with those by grab sampling in a wastewater treatment plant, suggesting it is reliable for measuring FQs in waters. For the first time, we demonstrate that key water chemistry parameters do have interaction effects on the DGT measurements, which should be considered for the data interpretation. The MIP-DGT is a promising tool to understand the interaction effects of the environmental parameters on the fate, behaviours and bioavailability/toxicity of organic contaminants and improve environmental risk assessments in the environment and modelling. (C) 2021 Elsevier B.V. All rights reserved.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.7
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available