Incorporation of inorganic and organic materials in polymer has contributed well towards the development of advanced reverse-osmosis membranes; with greater permeation, and salt rejection potential. We are reporting, Zeolite/GO/PVDF based thin-film composite membranes that were successfully synthesized by solution casting process, an eco-friendly, low-cost, and biocompatible technique. PVDF membranes modified with different ratios of GO/Zeo (0.03, 0.05 and 0.07) were characterized by FTIR, SEM, XRD, TGA, and DSC. Membranes were then tested for its potential for water permeation and salt rejection abilities. As prepared membranes owe better pore-distribution, a moderate degree of crystallinity and high absorption capability that is highly needed for micro-filtration phenomena used for desalination of saline water. The modified membranes exhibited enhanced water permeability up to 28.9 L/mh as compared to pure PVDF membrane having water permeability flux of 15.6 L/mh. Salt-rejection ability was found increasing for the membranes (up to 98%) modified with different concentration of GO/Zeo, as compare to pure PVDF membrane (82%). During water permeation and salt rejection studies, no deleterious impact was noted for modified PVDF membranes. This development will entail an efficient approach to furnish high-level performance reverse-osmosis membranes, with greater osmotic-pressure bearing capacity and higher stability.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.chemosphere.2022.136012 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Mix-Charged Nanofiltration Membrane for Efficient Organic Removal from High-Salinity Wastewater: The Role of Charge Spatial Distribution.
Environ Sci Technol
January 2025
State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, PR China.
The efficient removal of organic contaminants from high-salinity wastewater is crucial for resource recovery and achieving zero discharge. Nanofiltration (NF) membranes are effective in separating organic compounds and monovalent salts, but they typically exhibit an excessive rejection of divalent salts. Modifying the charge characteristics of NF membranes can improve salt permeation; however, the role of charge spatial distribution in governing salt transport behavior is not fully understood.
View Article and Find Full Text PDFFacile Synthesis of Thermoresponsive Alternating Copolymers with Tunable Phase-Transition Temperatures.
Polymers (Basel)
December 2024
Department of Polymer Materials, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China.
A series of novel amphiphilic alternating CPEG copolymers were synthesized through an amine-epoxy click reaction comprising aliphatic amine and polyethylene glycol diglycidyl ether (PEGDE). These polymers were characterized in detail via nuclear magnetic resonance (NMR), gel permeation chromatography (GPC), Fourier-transform infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA) to confirm the successful synthesis. Due to their amphiphilic structure, these polymers display thermoresponsiveness, with tunable cloud points (Tcps) that are adjustable from 20.
View Article and Find Full Text PDFEffect of Cholic Acid Salt and Its Mixed Micelles on the Morphology of Giant Unilamellar Vesicles (GUV).
J Oleo Sci
January 2025
Faculty of Science and Technology, Tokyo University of Science.
Article Synopsis
- Bile salts act as biosurfactants in the gastrointestinal tract, helping to emulsify and absorb fat-soluble nutrients and drugs.
- The study utilized giant unilamellar vesicles (GUVs) to investigate the permeation behavior of bile salts and their mixed micelles, using sodium cholate (NaC) and various lipophilic substances.
- Findings showed that below the critical micelle concentration (CMC), NaC causes endocytic changes in GUVs, while above the CMC, mixed micelles interact with the membrane differently, forming aggregates that migrate into the GUV, with variations observed depending on the type of lipophilic component used.
Heteropolyacid Ligands in Two-Dimensional Channels Enable Lithium Separation from Monovalent Cations.
ACS Nano
January 2025
Institute of Molecular Plus, Department of Chemistry, Tianjin University, Tianjin 300072, People's Republic of China.
Extracting lithium from salt lakes requires ion-selective membranes with customizable nanochannels. However, it remains a major challenge to separate alkali cations due to their same valences and similar ionic radius. Inspired by the K channel of KcsA K, significant progress has been made in adjusting nanochannel size to control the ion selectivity dominated by alkali cations dehydration.
View Article and Find Full Text PDFNanofiltration membranes with fast water transport induced by controlled interfacial diffusion to enhance desalination and micropollutant removal.
Water Res
December 2024
State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, PR China.
Nanofiltration (NF) membranes offer tremendous potential in wastewater reuse, desalination, and resource recovery to alleviate water scarcity and environmental contamination. However, separating micropollutants and charged ions from wastewater while maintaining high water permeation remains challenging for conventional NF membranes. Customizing diffusion and interaction behavior of monomers at membrane-forming interfaces is promising for regulating interior pore structures and surface morphology properties for polyamide NF membranes, reaching efficient screening and retaining of solutes from water.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!