Research Abstracts

In this paper, hydrogel membrane techniques used for CO2 removal from air were introduced. Firstly, the PVDF hollow fibers were prepared by dry-jet wet-spinning phase-inversion process, then membrane module was made of them as a CO2 removal equipment. PVDF hollow fiber membranes modified by alkali,

In this paper the transport behavior of water vapor and nitrogen in a poly(butylene terephthalate) poly (ethylene oxide) block copolymer is discussed. This polymer has a high solubility for water (300 cm3 (STP)/cm3 polymer at activity 0.9). A new permeation set up has been built to determine the wat

Guest molecular dynamics related to the stable complexing behavior of syndiotactic polystyrene (sPS)xylene isomer (m- and p-xylene, abbreviated MX and PX) complexes have been characterized by solid-state 13C-NMR spectroscopy. Similar chemical shifts are observed for both sPS complexes in the 13C-CP/

Long-term experiments with a membrane bioreactor to remove dimethyl sulfide (Me2S) from waste air are reported for the first time. The membrane bioreactor contained a polydimethylsiloxane/Zirfon composite membrane and was inoculated with Hyphomicrobium VS, a methylotrophic micro-organism. The optim

A new hybrid gas separation process combining membrane permeation and pressure swing adsorption (PSA) is presented. An integrated model was formulated which successfully predicts all process characteristics. Our modeling work shows that the coupled process increases the efficiency of the pressurizat

This article describes a novel process for recovery of aromatic amines and phenolic compounds form wastewaters, the membrane aromatic recovery aromatic system (MARS). Laboratory work on wastewaters containing aniline and phenol will be presented, including data demonstrating removal and recovery of

The co-transport of silver from nitric acid solutions across a bulk liquid membrane (BLM) in a HF contactor and across a layered BLM with a new carrier octylphenylmethane-sulfide (MF18) have been studied. The transport rate of silver through a BLM containing the MF18 in the HF contactor is much lowe

Ion-size recognition of three trivalent metal ions (Fe(III), Al(III), Cr(III)) with 3-phenyl-4-acyl-5-isoxazolones derivatives has been studied by the liquid-liquid extraction method. The diffusion of the corresponding complexes with Fe(III) in supported liquid membrane (SLM) system has been evaluat

The liquid membrane transport of some biogenic amines (n-buthylamine, hexylamine) and aromatic amino acids methylesters by p-tert-butylcalix[n]arenes (n = 6.8) were investigated. The transport driving force was the pH gradient between the source and the receiving phases. The complexation properties

The development of concentration boundary layer (CBL) inside the hollow fibers, based on the experimental data from membrane-based solvent extraction of thallium (III) from chloride-containing acidic solutions with butyl acetate, was investigated. The experiments have been performed using three labo