Preparation and use of magnetic poly(glycidyl methacrylate) resin in drinking water treatment

Abstract

Magnetic poly(glycidyl methacrylate) (m-PGMA) was synthesized and characterized, and its efficiency in removing natural organic matter (NOM) and carbamazepine (CBZ) from synthetic water was studied. The effects of factors such as time and m-PGMA dosage on NOM removal were investigated. Furthermore, magnetic ion exchange resin (MIEX V R ) was used for comparison with m-PGMA in CBZ removal. m-PGMA was found to have a strong magnetic character whose specific saturation magnetization and mass fraction of magnetite were 10.79 emu g À1 and 6.166 wt %, respectively, thus providing additional utility for m-PGMA in slurry form in completely mixed continuous-flow reactors. Lab-scale studies showed that the removal rate rose rapidly with time and reached a pseudo-equilibrium after 30 min. In addition, the highest doses of m-PGMA achieved the highest removal efficiency. After 30 min of contact with 5, 10, and 15 mL L À1 of m-PGMA, the removal rates, based on UV absorbance measurements at 254 nm (UV 254 ), were 56%, 67%, and 79%, respectively, whereas the removal rates of dissolved organic carbon (DOC) were 53%, 60%, and 72%, respectively. Additionally, the scale ultraviolet absorbance values (SUVA) decreased during a 30 min contact time, thereby suggesting that the NOM removed by m-PGMA had greater aromatic character. In multiple-loading tests, UV 254 removal gradually decreased and achieved 18.39% at 1600 bed volume; it was kept constant at this level. Compared to MIEX V R , m-PGMA had a higher CBZ removal rate (27.8% and 34.7% for 20 mL L À1 and 25 mL L À1 of m-PGMA, corresponding to the removal of 200 lg L À1 CBZ).The resulting higher removal rate of CBZ contributed to stronger adsorption, a higher specific surface area, and larger pore volume.

Highly Monodisperse Sub‐microspherical Poly(glycidyl methacrylate) Nanocomposites with Highly Stabilized Gold Nanoparticles

“…In addition, the CH stretching in the methyl and methylene group in the PGMA composites was observed at 2940 cm −1 . Furthermore, a broad absorption band associated with OH stretching vibrations of hydroxyl group was also found at around 3390 cm −1 . These results demonstrated that the PGMA composites had been successfully synthesized.…”

Adsorptive Removal of Carbamazepine and Diatrizoate in Iron Oxide Nanoparticles Amended Sand Column Mimicing Managed Aquifer Recharge

“…However, at near neutral pH of synthetic wastewater employed in this study the adsorption of CBZ is somewhat less favorable on negative silica surface [15]. The MAA coated NPs exhibited somewhat better adsorption toward CBZ than in control column, possibly from a higher specific surface area, and larger pore volume of MAA functionalized NPs [16].…”

Removal of Dissolved Organic Matter by Magnetic Ion Exchange Resin

“…A different magnetic anion exchange resin (NDM-1) was synthesized in which the functional group was triethylamine instead of trimethylamine on MIEX resin and as a result, the NDM-1 resin showed greater adsorption of nitrate than MIEX resin in the presence of sulfate [86], similar to the results discussed for perchlorate. Another magnetic resin, magnetic poly(glycidyl methacrylate), was synthesized and compared with MIEX resin for removal of DOM and carbamazepine [87].…”