Removal of common pharmaceuticals present in surface waters by Amberlite XAD-7 acrylic-ester-resin: Influence of pH and presence of other drugs

Significance of antifouling paint flakes to the distribution of dichlorodiphenyltrichloroethanes (DDTs) in estuarine sediment

“…These results suggested that boat surface paints and/or paint flakes can act as the sorbents to accumulate pollutants from surrounding water. As is well known, binders/resins constituting approximately 14e30% of the contents in paints (Wanninkhof, 1992;Zappa et al, 2001) can also sorb organic pollutants (Dominguez et al, 2011;Wu et al, 2010). Apparently, unevenly distributed paint flakes can substantially change the environmental fate and behavior of HOCs in estuarine sediment.…”

Effect of resin charged functional group, porosity, and chemical matrix on the long-term pharmaceutical removal mechanism by conventional ion exchange resins

“…In some cases (i.e., at pH levels lower than the target pharmaceutical pK a value when these pharmaceuticals were undissociated), neutral resins are even more effective for pharmaceutical removal than AERs (Robberson et al, 2006;Domínguez et al, 2011) (e.g., TC by NDA150 andXAD-4 (Zhou et al, 2012); CBZ, NPX, and trimethoprim and ketoprofen by XAD-7 (Domínguez et al, 2011); and salicylic acid by AB-8, XAD-4, and XAD-7 (Huang et al, 2012)). In this study, the efficient adsorption of CBZ, TC, and NPX by D4006 resins was also observed during short-term cyclical operation.…”

“…Non-electrostatic interactions have often been demonstrated to significantly enhance pharmaceutical removal selectivity during AER treatment (Li and SenGupta, 2004;Landry and Boyer, 2013;Landry et al, 2015). In some cases, nonelectrostatic interaction-dominated neutral resins are even more effective for pharmaceutical removal than AERs when these pharmaceuticals are undissociated (Robberson et al, 2006;Domínguez et al, 2011;Huang et al, 2012;Zhou et al, 2012).…”

Isolation of naproxen from wastewater using carbon-based magnetic adsorbents

“…In addition, naproxen is neutral at acidic medium. Therefore, the adsorption occurs by hydrogen bonding and van der Waals interaction (Domínguez et al 2011). At the basic medium, both of the naproxen and the surface of adsorbent are negatively charged and the electrostatic repulsion occurs.…”