Huang, Shiyang;McDonald, James A.;Kuchel, Rhiannon P.;Khan, Stuart J.;Leslie, Greg;Tang, Chuyang Y.;Mansouri, Jaleh;Fane, Anthony G. published 《Surface modification of nanofiltration membranes to improve the removal of organic micropollutants: Linking membrane characteristics to solute transmission》 in 2021. The article was appeared in 《Water Research》. They have made some progress in their research.HPLC of Formula: 140-66-9 The article mentions the following:
Surface modification of nanofiltration (NF) membranes has great potential to improve the removal of organic micropollutants (OMs) by NF membranes. This study used polydopamine (PDA) as a model coating to comprehensively link the changes in membrane properties with the changes in transmission of 34 OMs. The membrane characterization demonstrated that a thicker, denser, and more hydrophilic PDA coating can be achieved by increasing the PDA deposition time from 0.5 to 4 h. Overall, the transmissions of target OMs were reduced by PDA-coated NF membranes compared to unmodified NF membranes. The neutral hydrophobic compounds showed lower transmissions for longer PDA coating (PDA4), while the neutral hydrophilic compounds tended to show lower transmissions for shorter PDA coating (PDA0.5). To explain this, competing effects provided by the PDA coatings are proposed including sealing defects, inducing cake-enhanced concentration polarization in the coating layer for neutral hydrophilic compounds, and weakened hydrophobic adsorption for neutral hydrophobic compounds For charged compounds, PDA4 with the greatest neg. charge among the PDA-coated membranes showed the lowest transmission. Depending on the mol. size and hydrophilicity of the compounds, the transmission of OMs by the PDA4 coating could be reduced by 70% with only a 26.4% decline in water permeance. The correlations and mechanistic insights provided by this work are highly useful for designing membranes with sp. surface properties via surface modification to improve the removal of OMs without compromising water production To complete the study, the researchers used 4-tert-Octylphenol (cas: 140-66-9) .
4-tert-Octylphenol(cas: 140-66-9) is a common environmental pollutant showing weak estrogenic effects.HPLC of Formula: 140-66-9 It has been shown to cause harm to vertebrate male reproductive systems.
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