Enhanced adsorption of perfluorooctanoic acid (PFOA) from water by granular activated carbon supported magnetite nanoparticles

Installation of synergistic binding sites onto porous organic polymers for efficient removal of perfluorooctanoic acid

“…In addition, the IR spectra for PFOA@PAF-1-NDMB (Fig. 7b ) exhibited a large chemical shift of C-N stretch mode from 1676 cm −1 in PAF-1-NDMB to 1683 cm −1 in PFOA@PAF-1-NDMB, attesting the formation of strong electrostatic interactions between COO − in PFOA and CH 3 -N + in PAF-1-NDMB 58 , 59 . The similar phenomenon can also be achieved in other quaternary ammonium functionalized adsorbents, which show a large shift in IR (5~6 cm −1 ) (Supplementary Table 6 , Supplementary Fig.…”

Adsorption of perfluorooctanoic acid from water by pH-modulated Brönsted acid and base sites in mesoporous hafnium oxide ceramics

“…Alternatively, adsorption-based technologies are preferred due to their efficiency and economic benefits ( Xu et al., 2020 ). Granular activated carbon (GAC) has been extensively studied due to its low cost and broad usability.…”

Polymer-assisted modification of metal-organic framework MIL-96 (Al): influence of HPAM concentration on particle size, crystal morphology and removal of harmful environmental pollutant PFOA

“…Studied adsorbents range from activated carbon (AC) (Du et al, 2015;Xu et al, 2020), minerals (Shih and Wang, 2013;Wang and Shih, 2011), magnetic nanoparticles (Badruddoza et al, 2017), polymers (Xiao et al, 2017), resins (Yang et al, 2018), functionalized cellulose (Ateia et al, 2018), graphene oxide-silica hybrid (Ali et al, 2020), and metal-organic frameworks (MOFs) Jun et al, 2019;Sini et al, 2018Sini et al, , 2019. However, except for MOFs, most adsorbents only exhibit between low and moderate PFOA uptake compared to the industrial AC standard (>90% removal, 3M Company, USA) (Vecitis et al, 2009).…”