Topic
Reverse osmosis
About: Reverse osmosis is a research topic. Over the lifetime, 20780 publications have been published within this topic receiving 299185 citations. The topic is also known as: RO.
Papers published on a yearly basis
Papers
More filters
TL;DR: A fully atomistic molecular dynamics simulation was performed to investigate PA membrane and reveals the presence of small local two-layer slip structures in PA membrane with 70% cross-linking, primarily due to short-range anisotropic interactions among aromatic benzene rings.
Abstract: Polyamide (PA) membrane-based reverse-osmosis (RO) serves as one of the most important techniques for water desalination and purification. Fundamental understanding of PA RO membranes at the atomistic level is critical to enhance their separation capabilities, leading to significant societal and commercial benefits. In this paper, a fully atomistic molecular dynamics simulation was performed to investigate PA membrane. Our simulated cross-linked membrane exhibits structural properties similar to those reported in experiments. Our results also reveal the presence of small local two-layer slip structures in PA membrane with 70% cross-linking, primarily due to short-range anisotropic interactions among aromatic benzene rings. Inside the inhomogeneous polymeric structure of the membrane, water molecules show heterogeneous diffusivities and converge adjacent to polar groups. Increased diffusion of water molecules is observed through the less cross-linked pathways. The existence of the fast pathways for water p...
81 citations
01 Jan 1986
TL;DR: In this paper, the different membrane structures, their function and application in various separation processes are described, and the preparation procedures of the various membrane types are discussed with special emphasis on symmetric and asymmetric membranes obtained by the phase inversion process.
Abstract: In recent years, separations with synthetic membranes have become increasingly important processes in the chemical industry, in food and wastewater processing, and in medical treatment. Synthetic membranes made from a variety of polymers are used in processes such as microfiltration, ultrafiltration, reverse osmosis, electrodialysis, and gas separations. In this paper, the different membrane structures, their function and application in various separation processes are described. The preparation procedures of the various membrane types are discussed with special emphasis on symmetric and asymmetric membranes obtained by the phase inversion process.
80 citations
TL;DR: In this paper, the authors examined the adsorption and release process of several endocrine-disrupting chemicals (EDCs) during NF/RO filtration processes and showed that the membrane can serve as a large reservoir for EDCs and their release may be possible during membrane cleaning or erratic pH variation during operation.
80 citations
TL;DR: In this paper, the feasibility of a lab-scale electrodialysis reversal (EDR) system for water recovery from industrial reverse osmosis (RO) brine and minimizing the volume of the resulting concentrated brine was evaluated.
80 citations
TL;DR: In this paper, the behavior of cellulose acetate membranes in the treatment by reverse osmosis of ammonium aqueous solutions is described in a commercial cross flow test module.
80 citations