Showing papers in "Separation and Purification Technology in 2011"

TL;DR: In this paper, a review of the recent efforts to tackle the underlying problems and the effects of various kinds of modification that would eventually heighten the performance of membrane applications in gas separations were discussed.

TL;DR: In this article, a review of industrial applications of DWCs and related research activities, including column configuration, design, modelling and control issues, is presented, with an emphasis on the application of the DWC for azeotropic, extractive and reactive distillation.

TL;DR: In this paper, both dense and asymmetric metal organic frameworks (MOFs) containing membranes were respectively prepared by solvent evaporation and phase inversion with Matrimid® as base polymer and three different MOFs: [Cu 3 (BTC) 2 ], ZIF-8 and MIL-53(Al) as filler.

TL;DR: In this paper, the authors used methanol as solvent at different concentrations (20-100%), solvent/solid ratios (10-40 ml/g SCG), and extraction times (30- 90 min), and evaluated the influence of these operational variables on the content of total phenolic compounds and antioxidant activity of the produced extracts.

TL;DR: In this article, the authors investigated the TMP increase rate due to membrane fouling inversely follows the measured pore size and found that the higher degree of fouling on the polymeric membrane is partly due to its lower volume/area ratio, compared to ceramic membranes.

TL;DR: In this paper, the effect of fiber diameter on capture efficiency and pressure drop was investigated for 50-500-nm nano-aerosols using nanofiber filter for strong diffusion capture wherein Peclet number Pe drops to single digit and even below unity.

TL;DR: In this paper, the results have shown that increasing the residence time, the amount of yeast extract and the addition of microorganisms originally growing on forest residues had positive effects on the dye removal.

TL;DR: In this article, the authors investigated the effect of CaSO4 scaling in direct contact membrane distillation (DCMD) with aqueous solutions containing sparingly soluble salts and showed that the scaling occurred only after a sufficiently long induction time of up to 25 h (corresponding to a saturation index up to 1.5).

TL;DR: In this paper, the effect of TiO2 nanoparticles addition on mixed matrix membranes (MMMs) based on Matrimd5218 prepared by using solution-casting method has been investigated.

TL;DR: In this article, zero-valent iron (NZVI) particles were synthesized in the laboratory and used to investigate the reduction kinetics and degradation mechanisms of hexachlorobenzene (HCB) and the environmental effects.

TL;DR: In this article, the effects of both Fe and Al electrode connection modes (parallel and series) and electrode materials on arsenic removal efficiency from potable water by electrocoagulation (EC) process were investigated.

TL;DR: In this article, the physicochemical properties of three Co/SiO2 catalysts were characterized by several techniques, such as XRD, SEM, TEM, FT-IR and FT-Raman, and the catalytic activity in heterogeneous activation of peroxymonosulphate to produce sulphate radicals for phenol degradation was investigated.

TL;DR: In this paper, a detailed framework for simulation of VPSA units is presented and a detailed description of the adsorbent column is provided and linked with other ancillary parts of the unit.

TL;DR: In this article, a commercially available NF membrane was modified by layer-by-layer assembly of alternating polyelectrolyte thin films in order to increase rejection and selectivity towards monovalent ions, namely F − and Cl −.

TL;DR: In this paper, a detailed investigation was carried out to evaluate the occurrence, persistence and fate of a range of micropollutants at different processing points at a full-scale water recycling plant (WRP) in Queensland, Australia.

TL;DR: In this paper, the sorption and desorption of U(VI) from contaminated groundwater by nanoporous and non-nanoporous alumina were investigated under ambient conditions.

TL;DR: In this article, a mixed matrix membranes (MMM) comprised of multi-walled carbon nanotubes (MWCNTs) inside polyethersulfone (PES) matrix were fabricated and characterized for gas separation performance.

TL;DR: In this paper, a computational-experimental study was carried out to select ionic liquids with optimized properties for absorption of ammonia (NH3), and two commercially available task-specific ILs, [EtOHmim][BF4] and [choline][NTf2], were proposed as NH3 absorbents, in terms of thermal stability, liquid-phase window and ammonia solubility.

TL;DR: In this article, the electrochemical degradation of a model azo dye of methyl orange on the mixed metal oxide (MMO) and boron-doped diamond (BDD) electrode was investigated in terms of decolorization, COD and TOC removal as well as the energy consumption.

TL;DR: In this paper, a mixed matrix membrane incorporating functionalized carbon nanotubes (f-MWNTs) was fabricated by the solution casting method, in which the fMWNT were embedded into the polyimide membrane and the resulting membranes were characterized.

TL;DR: In this article, the effect of operating conditions such as pH, temperature, transmembrane pressure and volume reduction factor (VRF) on the membrane fouling was investigated using FM NP010 membrane.

TL;DR: In this article, the effect of hydrogen peroxide concentration, initial pH, Fe2O3/SBA-15 loading, ultrasonic power, and initial solution concentration on the decolorization of C.I.

TL;DR: In this article, Fenton and electro-Fenton were employed to treat biologically stabilized coking wastewater, i.e. the effluent of a biological coke wastewater treatment, and the significance levels of linear and interaction effects of the reaction parameters on processes efficiencies were obtained.

TL;DR: In this paper, the selectivity of palladium(II) extraction in the presence of quaternary phosphonium salts was investigated in aqueous solution with toluene.

TL;DR: A simple hydrothermal method was developed for the size controlled synthesis of SnS2 nanoparticles, using common and inexpensive SnCl4·5H2O and thioacetamide as the reactants and 5 vol% acetic acid aqueous solution as the solvent.

TL;DR: In this article, a bioactive phytochemical, curcumin, was isolated from dried rhizomes of Curcuma longa using Soxhlet, microwave, ultra-sonic and supercritical carbon dioxide assisted extraction techniques.

TL;DR: In this article, the authors investigated the synergistic extraction and separation of cobalt (II), manganese (II) and lithium (I) from simulated sulfuric acid leaching of waste cathodic materials, using mixture of bis(2,4,4-trimethylpentyl) phosphinic acid (Cyanex272, HA) and 2-ethylhexyl PHY-88A, HL) in n-heptane.

TL;DR: In this paper, nine Deep eutectic solvents (DESs) based on choline chloride (ChCl) and another nine DESs based on methyltriphenylphosphonium bromide (MTPB) salts with different compositions were synthesized and utilized as solvers for the removal of residual KOH content from palm oil-based biodiesel.

TL;DR: In this paper, membrane distillation (MD) is used for water treatment in all thermal cogeneration plants, and it has potential advantages in: the ability to deal with high temperature and high humidity.

TL;DR: In this article, the authors investigated aqueous Cr(VI) reduction/removal by electrotreatment with mild steel electrode in a batch stirred reactor and found that the highest reduction rate was 3.8 mg/l−1min−1 at lowest initial pH 2 at the beginning.