The Experts below are selected from a list of 5262 Experts worldwide ranked by ideXlab platform
Arthur Chow - One of the best experts on this subject based on the ideXlab platform.
-
Transport of iron Halides through polyurethane ether-type membranes.
Talanta, 1995Co-Authors: Richard D. Oleschuk, Arthur ChowAbstract:Abstract The transport of iron(III) using polyether-based polyurethane membranes was studied. The rate at which iron passes through the membrane depends on the formation of the HFeX 4 species, which is related to the initial Acid and salt concentration of the metal solution. Iron is quantitatively transported from a cell of high Acid-Halide concentration to one with low concentration.
Richard D. Oleschuk - One of the best experts on this subject based on the ideXlab platform.
-
Transport of iron Halides through polyurethane ether-type membranes.
Talanta, 1995Co-Authors: Richard D. Oleschuk, Arthur ChowAbstract:Abstract The transport of iron(III) using polyether-based polyurethane membranes was studied. The rate at which iron passes through the membrane depends on the formation of the HFeX 4 species, which is related to the initial Acid and salt concentration of the metal solution. Iron is quantitatively transported from a cell of high Acid-Halide concentration to one with low concentration.
Runwei Li - One of the best experts on this subject based on the ideXlab platform.
-
polyaniline poly vinylidene fluoride blend microfiltration membrane and its spontaneous gold recovery application
Science China-chemistry, 2018Co-Authors: Yuanzhao Wu, Xiaohui Yi, Bin Chen, Runwei LiAbstract:Structural regular polyaniline was synthesized via a modified-chemical oxidative polymerization reaction. Highly hydrophilic polyaniline (PANi) and polyaniline-poly(vinylidene fluoride) blend (PANi-PVDF) membranes were prepared by solution casting and phase inversion techniques. Both of the mechanical and filtration properties of the membranes depend on the polymer composition and doping level of the blends. The elasticity of the membrane is greatly improved upon introducing poly(vinylidene fluoride) into the blend. The water permeability of the blend membranes is further enhanced when the membranes are doped with hydrochloric Acid. The PANi-PVDF blend membranes are capable of recovering metallic gold from the Acid/Halide leaching streams spontaneous and sustainably, and are promising candidates for wastewater treatments in electronic industries.
-
recovery of gold from hydrometallurgical leaching solution of electronic waste via spontaneous reduction by polyaniline
Progress in Natural Science: Materials International, 2017Co-Authors: Yuanzhao Wu, Qingming Fang, Xiaohui Yi, Runwei LiAbstract:Abstract The present study is primarily designed to develop an environmentally-benign approach for the recovery of precious metals, especially gold, from the ever increasingly-discarded electronic wastes ( e -waste). By coupling the metal reduction process with an increase in the intrinsic oxidation state of the aniline polymers, and the subsequent re-protonation and reduction of the intrinsically oxidized polymer to the protonated emeraldine (EM) salt, polyaniline (PANi) films and polyaniline coated cotton fibers are able to recover metallic gold from Acid/Halide leaching solutions of electronic wastes spontaneously and sustainably. The current technique, which does not require the use of extensive extracting reagents or external energy input, can recover as much as 90% of gold from the leaching Acidic solutions. The regeneration of polyaniline after gold recovery, as confirmed by the X-ray photoelectron spectroscopy measurements, promises the continuous operation using the current approach. The as-recovered elemental gold can be further concentrated and purified by incineration in air.
A. W. Castleman - One of the best experts on this subject based on the ideXlab platform.
-
Direct Experimental Evidence for Reactions between Dissolved Acid Halide and Chlorine Nitrate
The Journal of Physical Chemistry A, 2001Co-Authors: J. J. Gilligan And, A. W. CastlemanAbstract:Cluster chemistry employing a fast flow reactor was used to evaluate the enhanced reactivity of chlorine nitrate (ClONO2) with dissolved Acid Halide. Reactions of ClONO2 with deuterium chloride doped deuterated water clusters [D+(D2O)m(DCl)n, (m = 10−14, n = 1,2)] were investigated under thermal conditions over a temperature range of 148−158 K; deuterated species were employed in place of light hydrogen containing molecules to facilitate the determination of reaction mechanisms. Chemical reactions were found to occur between water clusters and chlorine nitrate only under conditions where dissolved deuterium chloride was present. Nitric Acid is found to remain within the water cluster to yield gaseous chlorine (Cl2) from the water cluster. These results provide direct evidence that an ionic reaction mechanism is involved in the heterogeneous reaction of hydrogen chloride and chlorine nitrate on clusters that mimic polar stratospheric cloud surfaces.
Tim Evans - One of the best experts on this subject based on the ideXlab platform.
-
Bonding structure and mineral analysis of size resolved atmospheric particles nearby steelmaking industrial sites in Australia
Aerosol and Air Quality Research, 2016Co-Authors: Kazi Mohiuddin, Vladimir Strezov, Peter F. Nelson, Tim EvansAbstract:Comprehensive understanding of organic and inorganic compounds in atmospheric particles of different size fractions ranging from coarse to ultrafine is essential for assessment of the impact of particles on the radiation balance. In this work the size resolved atmospheric particles were collected in the vicinity of three iron and steelmaking sites and one urban background site in Australia using an eight staged micro orifice uniform deposit impactor (MOUDI) sampler. The sampled particles were assessed using FTIR technique to determine the dominant functional groups, and XRD technique for determining the mineral content of the inorganic compounds. This study revealed variable distributions between and among bonding groups in urban and industrial areas. The hydroxyl (-OH) group (in alcohol compounds, surface OH on crystals, salt hydrate), aliphatic carbon (-CH_2) group (in methylene compounds, n-alkane), carbonyl (-CO) group (in Acid Halide, aryl carbonate, ketone, conjugated ketone), and amino (-NH_2) group (in primary amino compounds such as n-butylamine) in atmospheric particles were identified and most likely originated from combustion processes (industrial, transport, and domestic), sea spray, long range transport particles, and secondary organic particles sources nearby industrial and urban areas. Hematite mineral in the inorganic fraction of the atmospheric particles was found predominantly in the vicinity of the iron and steelmaking industries, which most likely originates from raw materials handling and process emissions.
