Adsorption of hydrophilic and hydrophobic pharmaceuticals on RO/NF membranes: Identification of interactions using FTIR (CROSBI ID 231238)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Dolar, Davor ; Drašinac, Nina ; Košutić, Krešimir ; Škorić, Irena ; Ašperger, Danijela
engleski
Adsorption of hydrophilic and hydrophobic pharmaceuticals on RO/NF membranes: Identification of interactions using FTIR
This article examines the adsorption of pharmaceuticals on reverse osmosis (RO) and nanofiltration (NF) membranes. The membranes were characterized in terms of Fourier transformation infrared (FTIR) spectra, surface charge, hydrophobicity, pore size distribution, and roughness. Five pharmaceuticals were used to determine their rejection and possible interactions with the AQ2 membranes. Albendazole, a hydrophobic pharmaceutical, adsorbed on the NF (NF270) and RO (XLE) membranes. FTIR spectra showed significant changes (new peaks/bonds) on the membranes, confirming that adsorption plays an important role in the overall mechanism of rejection in the case of hydrophobic compounds. Hydrophilic pharmaceuticals (sulfaguanidine, trimethoprim, hydrocortisone, and procaine) did not adsorb on the XLE membrane, showing that size exclusion and electrostatic repulsion were both dominant removal mechanisms. This article gives new insights into NF membranes in the treatment of hydrophilic compounds. The results clearly show the adsorption of hydrophilic compounds on the NF membranes since H-bonds and p–p interactions were observed on their FTIR spectra. Therefore, both the hydrophobic and the hydrophilic adsorption have to be taken into account when considering the removal mechanism, especially in the case of NF membranes.
adsorption ; membranes ; polyamides
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Podaci o izdanju
134 (5)
2017.
44426
12
objavljeno
0021-8995
1097-4628
10.1002/app.44426
Povezanost rada
Interdisciplinarne tehničke znanosti, Kemija, Kemijsko inženjerstvo, Temeljne tehničke znanosti