The cost-effective and energy-efficient removal of organic micropollutants (MPs) from water and wastewater is challenging. The objective of this research was to evaluate the performance of porous β-cyclodextrin polymers (P-CDP) as adsorbents of MPs in aquatic matrixes. Adsorption kinetics and MP removal were measured in batch and flow-through experiments for a mixture of 83 MPs at environmentally relevant concentrations (1 μg L) and across gradients of pH, ionic strength, and natural organic matter (NOM) concentrations. Performance was benchmarked against a coconut-shell activated carbon (CCAC). Data reveal pseudo-second-order rate constants for most MPs ranging between 1.5 and 40 g mg min for CCAC and 30 and 40000 g mg min for P-CDP. The extent of MP removal demonstrates slower but more uniform uptake on CCAC and faster but more selective uptake on P-CDP. Increasing ionic strength and the presence of NOM had a negative effect on the adsorption of MPs to CCAC but had almost no effect on adsorption of MPs to P-CDP. P-CDP performed particularly well for positively charged MPs and neutral or negatively charged MPs with McGowan volumes greater than 1.7 (cm mol)/100. These data highlight advantages of P-CDP adsorbents relevant to MP removal during water and wastewater treatment.

Organic micropollutants (MPs) are anthropogenic substances that contaminate water resources at trace concentrations.M any MPs,i ncluding per-a nd polyfluorinated alkyl substances (PFASs), have come under increased scrutiny because of their environmental persistence and association with various health problems.Ab-cyclodextrin polymer linked with tetrafluoroterephthalonitrile (TFN-CDP) has high affinity for cationic and many neutral MPs from contaminated water because of anionic groups incorporated during the polymerization. But TFN-CDP does not bind many anionic MPs strongly,i ncluding anionic PFASs.T oa ddress this shortcoming,w er educed the nitrile groups in TFN-CDP to primary amines,w hich reverses its affinity towards charged MPs.T FN-CDP exhibits adsorption distribution coefficients (log K D values) of 2-3 for cationic MPs and À0.5-1.5 for anionic MPs,w hereas the reduced TFN-CDP exhibits log K D values of À0.5-1.5 for cationic MPs and 2-4 for anionic MPs, with especially high affinity towards anionic PFASs.K inetic studies of the removal of 10 anionic PFASs at environmentally relevant concentrations showed 80-98 %r emoval of all contaminants after 30 min and was superior to commercial granular activated carbon. These findings demonstrate the scope and tunability of CD-based adsorbents derived from as ingle polymerization and the promise of novel adsorbents constructed from molecular receptors.Supportinginformation and the ORCID identification number(s) for the author(s) of this article can be found under: https://doi.

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Lead and superior micropollutant sequestration by phenolated cyclodextrin polymer networks.