Removal of Hardening Salts by Nanofiltration Composite Membranes

Removal of hormones and antibiotics by nanofiltration membranes

Removal of hormones and antibiotics by nanofiltration membranes Ismail Koyuncu a,∗, Osman A. Arikan a,b, Mark R. Wiesner c, Clifford Rice b a Department of Environmental Engineering, Istanbul Technical University, Maslak, Istanbul 34469, Turkey b USDA-ARS, Environmental Management and Byproduct Utilization Laboratory, Beltsville, MD 20705, USA c Department of Civil and Environmental Engineering...

Nanofiltration membranes

Pharmaceutical retention mechanisms by nanofiltration membranes.

This study investigates the retention mechanisms of three pharmaceuticals-sulfamethoxazole, carbamazepine, and ibuprofen-by nanofiltration (NF) membranes. Laboratory-scale experiments were carried out with two well-characterized NF membranes, with the goal of relating pharmaceutical retention behavior to membrane characteristics, physicochemical properties of the pharmaceutical molecules, and s...

Removal of natural hormones by nanofiltration membranes: measurement, modeling, and mechanisms.

The removal mechanisms of four natural steroid hormones-estradiol, estrone, testosterone, and progesterone-by nanofiltration (NF) membranes were investigated. Two nanofiltration membranes with quite different permeabilities and salt retention characteristics were utilized. To better understand hormone removal mechanisms, the membrane average pore size was determined from retention data of inert...

Removal of assimilable organic carbon and biodegradable dissolved organic carbon by reverse osmosis and nanofiltration membranes

The main objective of this study was to evaluate the effectiveness of reverse osmosis (RO) and nanofiltration (NF), under various solution chemistries, on bacterial regrowth potential as quantified by assimilable organic carbon (AOC) and biodegradable dissolved organic carbon (BDOC). The bench-scale experiments, using tap groundwater spiked with acetate as organic carbon, revealed that AOC remo...