We report pressure-driven liquid-phase isotope separation (dead-end filtration) to enrich D and 18O in natural water using graphene oxide (G-O) UV-reduced (UV-rG-O) membranes. The diffusivity (molecular diffusion adsorption separation) was found be responsible for separation. Adsorption is the dominant mechanism improvements enrichment via increased G-O loading that leads number of sites (epoxy...

A PEBAX-nano zeolite X mixed matrix membrane was fabricated and operationally characterized using single gas (CO2) permeation. X-ray diffraction (XRD) analysis was used to study the arrangement of polymer chains of mixed matrix membrane. The membranes were characterized by scanning electron microscopy (SEM) to study cross-sectional morphology. The single gas permeability were carried...

Bacteriorhodopsin (bR) is a retinal protein in purple membrane of Halobacterium salinarum, which functions as a light-driven proton pump. We have detected pressure-induced isomerization of retinal in bR by analyzing 15N cross polarization-magic angle spinning (CP-MAS) NMR spectra of [zeta-15N]Lys-labeled bR. In the 15N-NMR spectra, both all-trans and 13-cis retinal configurations have been obse...

The application of membranes in various industries is one of the most urgent needs to reduce energy consumption and environmental pollutants as well as low investment costs in the process of separation. In this investigation, the optimization of effective parameters for separation of gas mixture of CH4, CO2, O2 and N2 is studied by modified poly(4-met...

In this work, novel thin film composite membranes (TFCs) of poly (ether-6-block amide) (Pebax-1657) on a polyvinyl chloride (PVC) ultrafiltration membrane as support were prepared using inclined coating method for CO2 separation. Investigating the effects of top selective layer thickness formed by controlling the coating angle (15-60°) and polymer solution concentration (5-10 wt.%), ...

In this work we experimentally demonstrate (a) that the holding strength of universal jamming grippers increases as a function of the jamming pressure to greater than three atmospheres, and (b) that jamming grippers can be operated in the deep sea in ambient pressures exceeding one hundred atmospheres, where such high jamming pressures can be readily achieved. Laboratory experiments in a pressu...

Abstract In the present work, we developed a hybrid membrane via phase inversion process composed from polysulfone (PSF), cellulose nanocrystals (CNCs), and polyaniline (PANI) polymers for oil/water separation. Multiple techniques were used to characterize membranes. Results demonstrated that under gravity-driven process, blended PSF with CNC PANI had greatly higher water flux of 31.10, 29.01 2...

Poultry slaughterhouses produce a large amount of wastewater, which is usually treated by conventional methods. The traditional techniques face some challenges, especially the incapability recovering valuable nutrients and reusing water. Therefore, membrane technology has been widely adopted researchers due to its enormous advantages over Pressure-driven membranes, such as microfiltration (MF),...

We present an optical setup for spectroscopic measurements in the infrared and of Raman shift under high pressure and at low temperature. Using a membrane-driven diamond anvil cell, the pressure can be tuned in situ up to 20 GPa and the temperatures ranges from room temperature down to 18 K in transmission mode and 13 K in reflection mode. In transmission, the setup is entirely working under va...

The fouling behavior of osmotically-driven forward osmosis (FO) is widely believed to be superior with respect hydraulic pressure-driven membrane applications, based on a number experiments reported in the literature. However, experimental confounders often exist, preventing fair comparison between different processes, one being deployment non-comparable membranes. This study systematically inv...