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Tailored Polyanilines Are High-Affinity Adsorbents for Per- and Polyfluoroalkyl Substances
https://orcid.org/0000-0003-1273-7600
https://orcid.org/0000-0001-5275-3264
https://orcid.org/0000-0003-2490-1180
https://orcid.org/0000-0001-8704-3289
https://orcid.org/0000-0003-4874-9507
https://orcid.org/0000-0002-2322-1530
Remediation of water contaminated by per- and polyfluoroalkyl substances (PFAS) relies heavily on separation techniques. This work tested the adsorption of seven PFAS (including short-chain congeners) on polyaniline-derived polymers under simulated environmentally relevant conditions including a range of natural organic matter (NOM) and ion concentrations, mineral anionic and cationic species, and multi-component PFAS solutions. Results were benchmarked against commercial activated carbon and polymeric resin. The polymers poly-o-toluidine and polyaniline exhibited high PFAS removal efficiencies of over 98 and 75% of each PFAS in the compound mixture, respectively. The adsorption capacity of the polymers was comparable to that of activated carbon on a mass basis at low equilibrium concentrations (<50 μg L–1) and higher when adsorption was based on the surface area for the tested concentration range (1–1000 μg L–1). The tailored polymers performed similar to or better than the activated carbon and resin in the presence of elevated NOM. In addition, the fast PFOA adsorption kinetics (6.20 and 4.92 g mg–1 h–1 for poly-o-toluidine and polyaniline, respectively), the low desorption of adsorbed PFAS to aqueous media, and the facile regeneration using methanol with 10 g kg–1 NaCl at ambient temperature make these polymers ideal for flow-through sorption technology.
Polyaniline-derived polymers are efficient sorbents for rapidly removing per- and polyfluoroalkyl substances from environmentally relevant aqueous solutions.
Tailored Polyanilines Are High-Affinity Adsorbents for Per- and Polyfluoroalkyl Substances
https://orcid.org/0000-0003-1273-7600
https://orcid.org/0000-0001-5275-3264
https://orcid.org/0000-0003-2490-1180
https://orcid.org/0000-0001-8704-3289
https://orcid.org/0000-0003-4874-9507
https://orcid.org/0000-0002-2322-1530
Remediation of water contaminated by per- and polyfluoroalkyl substances (PFAS) relies heavily on separation techniques. This work tested the adsorption of seven PFAS (including short-chain congeners) on polyaniline-derived polymers under simulated environmentally relevant conditions including a range of natural organic matter (NOM) and ion concentrations, mineral anionic and cationic species, and multi-component PFAS solutions. Results were benchmarked against commercial activated carbon and polymeric resin. The polymers poly-o-toluidine and polyaniline exhibited high PFAS removal efficiencies of over 98 and 75% of each PFAS in the compound mixture, respectively. The adsorption capacity of the polymers was comparable to that of activated carbon on a mass basis at low equilibrium concentrations (<50 μg L–1) and higher when adsorption was based on the surface area for the tested concentration range (1–1000 μg L–1). The tailored polymers performed similar to or better than the activated carbon and resin in the presence of elevated NOM. In addition, the fast PFOA adsorption kinetics (6.20 and 4.92 g mg–1 h–1 for poly-o-toluidine and polyaniline, respectively), the low desorption of adsorbed PFAS to aqueous media, and the facile regeneration using methanol with 10 g kg–1 NaCl at ambient temperature make these polymers ideal for flow-through sorption technology.
Polyaniline-derived polymers are efficient sorbents for rapidly removing per- and polyfluoroalkyl substances from environmentally relevant aqueous solutions.
Tailored Polyanilines Are High-Affinity Adsorbents for Per- and Polyfluoroalkyl Substances
https://orcid.org/0000-0003-1273-7600
https://orcid.org/0000-0001-5275-3264
https://orcid.org/0000-0003-2490-1180
https://orcid.org/0000-0001-8704-3289
https://orcid.org/0000-0003-4874-9507
https://orcid.org/0000-0002-2322-1530
Remediation of water contaminated by per- and polyfluoroalkyl substances (PFAS) relies heavily on separation techniques. This work tested the adsorption of seven PFAS (including short-chain congeners) on polyaniline-derived polymers under simulated environmentally relevant conditions including a range of natural organic matter (NOM) and ion concentrations, mineral anionic and cationic species, and multi-component PFAS solutions. Results were benchmarked against commercial activated carbon and polymeric resin. The polymers poly-o-toluidine and polyaniline exhibited high PFAS removal efficiencies of over 98 and 75% of each PFAS in the compound mixture, respectively. The adsorption capacity of the polymers was comparable to that of activated carbon on a mass basis at low equilibrium concentrations (<50 μg L–1) and higher when adsorption was based on the surface area for the tested concentration range (1–1000 μg L–1). The tailored polymers performed similar to or better than the activated carbon and resin in the presence of elevated NOM. In addition, the fast PFOA adsorption kinetics (6.20 and 4.92 g mg–1 h–1 for poly-o-toluidine and polyaniline, respectively), the low desorption of adsorbed PFAS to aqueous media, and the facile regeneration using methanol with 10 g kg–1 NaCl at ambient temperature make these polymers ideal for flow-through sorption technology.
Polyaniline-derived polymers are efficient sorbents for rapidly removing per- and polyfluoroalkyl substances from environmentally relevant aqueous solutions.
Tailored Polyanilines Are High-Affinity Adsorbents for Per- and Polyfluoroalkyl Substances
Olshansky, Yaniv (author) / Gomeniuc, Anton (author) / Chorover, Jon (author) / Abrell, Leif (author) / Field, Jim A. (author) / Hatton, James (author) / He, Jianzhou (author) / Sierra-Alvarez, Reyes (author)
ACS ES&T Water ; 2 ; 1402-1410
2022-08-12
Article (Journal)
Electronic Resource
English
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