title: Adsorption of three pharmaceuticals on two magnetic ion-exchange resins.
abstract: The presence of pharmaceuticals in aquatic environments poses potential risks to the ecology and human health. This study investigated the removal of three widely detected and abundant pharmaceuticals, namely, ibuprofen (IBU), diclofenac (DC), and sulfadiazine (SDZ), by two magnetic ion-exchange resins. The adsorption kinetics of the three adsorbates onto both resins was relatively fast and followed pseudo-second-order kinetics. Despite the different pore structures of the two resins, similar adsorption patterns of DC and SDZ were observed, implying the existence of an ion-exchange mechanism. IBU demonstrated a combination of interactions during the adsorption process. These interactions were dependent on the specific surface area and functional groups of the resin. The adsorption isotherm fittings verified the differences in the behavior of the three pharmaceuticals on the two magnetic ion-exchange resins. The presence of Cl- and SO4(2-) suppressed the adsorption amount, but with different inhibition levels for different adsorbates. This work facilitates the understanding of the adsorption behavior and mechanism of pharmaceuticals on magnetic ion-exchange resins. The results will expand the application of magnetic ion-exchange resins to the removal of pharmaceuticals in waters.
authors.affiliation: School of Chemistry and Materials Science, Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control, Nanjing Normal University, Nanjing 210046, China. Electronic address: jiangmiao080804@126.com.
authors.forename: Miao
authors.initials: M
authors.lastname: Jiang
authors.affiliation: School of Chemistry and Materials Science, Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control, Nanjing Normal University, Nanjing 210046, China. Electronic address: yangwb007@njnu.edu.cn.
authors.forename: Weiben
authors.initials: W
authors.lastname: Yang
authors.affiliation: School of Chemistry and Materials Science, Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control, Nanjing Normal University, Nanjing 210046, China.
authors.forename: Ziwei
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: School of Chemistry and Materials Science, Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control, Nanjing Normal University, Nanjing 210046, China.
authors.forename: Zhen
authors.initials: Z
authors.lastname: Yang
authors.affiliation: School of Chemistry and Materials Science, Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control, Nanjing Normal University, Nanjing 210046, China.
authors.forename: Yuping
authors.initials: Y
authors.lastname: Wang
mesh_terms: D000327:Adsorption; D000900:Anti-Bacterial Agents / Q000737:chemistry; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000737:chemistry; D004008:Diclofenac / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007052:Ibuprofen / Q000737:chemistry*; D007475:Ion Exchange Resins / Q000737:chemistry*; D060328:Magnetic Phenomena; D013411:Sulfadiazine / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D000900:Anti-Bacterial Agents; D000894:Anti-Inflammatory Agents, Non-Steroidal; D007475:Ion Exchange Resins; D014874:Water Pollutants, Chemical; D013411:Sulfadiazine; D004008:Diclofenac; D007052:Ibuprofen
keywords: Adsorption; Electrostatic interactions; Ion-exchange; Pharmaceuticals; Resins