Incorporation of single-walled carbon nanotubes in ultrafiltration support structure for the removal of steroid hormone micropollutants

Self‐supported single‐wall carbon nanotube buckypaper membranes applied to air and water filtration

“…Besides the separation performance in gas and liquid phases, there are other advantages that buckypapers could provide during UF. They can show better resistance to temperature and chemical agents than other types of polymeric membranes, 31 SWCNTs can help to eliminate organic micropollutants by adsorption during UF 75 and CNTs in composite membranes have shown high antibacterial activity so they may have a high potential for avoiding biofouling and in general fouling by biomolecules 76 . Finally, the inherent conductivity of membranes containing CNTs could help in the use of an electrochemical stimulus to reduce fouling 22 …”

Environmental persistence, detection, and mitigation of endocrine disrupting contaminants in wastewater treatment plants – a review with a focus on tertiary treatment technologies

“…Another study evaluated the addition of SWCNTs in the UF structure for the removal of steroid hormone micropollutants from synthetic solutions. 85 With a dose of SWCNT of 2 g m −2 the removal was in the range of 50–75% at neutral pH and short residence times (0.08–7.1 s). Another study was carried out where the retention of diverse EDCs from synthetic solutions by using nanofiltration (NF)/reverse osmosis (RO) membranes was evaluated, considering factors like the membrane type, solute size, and solute–membrane interaction.…”

“…The removal percentage of EDCs by UF without EfOM was within the range of 7-27%, while in presence of EfOM the removal increased in the range of 3-42%. Another study evaluated the addition of SWCNT in the UF structure for the removal of steroid hormone micropollutants from synthetic solutions(85). With a dose of SWCNT of 2 g/m 2 the removal was in the range of 50-75% at neutral pH and short residence times (0.08-7.1 s).…”

Archives of Environmental Protection

“…The mechanism of organic micropollutant separation by a nanocomposite membrane can include the sieve effect, electrostatic forces, intermolecular interactions, and blocking or narrowing of pores by precipitated pollutant particles [Nguyen et al 2021, Zhang et al 2020. The dominant mechanism among these potential options is determined by the physicochemical properties of the micropollutants, the nature of the feed, and the surface and structural properties of the membrane.…”

“…5, it is clear that the adsorption of micropollutants during ultrafiltration decreased in the order: BPA > CBZ > BZT > CAF. In other words, the hydrophilicity/hydrophobicity of compounds affected the degree of micropollutant removal because adsorption plays a crucial role in the separation of low molecular weight compounds during ultrafiltration [Nguyen et al 2021, Zhang et al 2020.…”