Research Abstracts

A new hybrid process for treating wastewater, combining membrane microfiltration and flotation, was investigated. The hybrid process combines the advantages of both membrane separation and flotation: the flotation cell removed a large proportion of suspended solid particles while the membrane module

Membranes are very effective in removing a wide variety of water contaminants. Therefore, the use of these processes in water purification to replace or to improve conventional treatment has increased. An inherent problem of membranes is fouling, the accumulation of materials (foulants) near, on, or

A low-pressure membrane process was studied in order to treat aqueous solutions containing both dye and surfactant. The influence of various textile dyes (methyl orange, indigo carmine, amido black, titan yellow or direct black) on separation efficiency of surfactants (sodium dodecyl sulphate, SDS)

The removal and separation of Co-60, Sr-90, and Cs-137 radioisotopes from nitrate aqueous solutions were studied by competitive transport across cellulose triacetate plasticized membranes using organophosphorous acids compounds (D2EHPA, Cyanex 272, Cyanex 301 and Cyanex 302). Competitive transport o

The application of activated composite membranes (ACMs) and polymer inclusion membranes (PIMs) for the transport of Pb(II), Cd(II), and Zn(II) in a continuous extraction–reextraction system using organophosphorous acids as carriers was examined. The ion carriers, DEHPA, Cyanex 301, and Cyanex 302, w

Ultrafiltration separation of an anionic surface active agent belonging to the alkylsulfonate family was studied. Asymmetric membranes made of polyethersulfone, polysulfone, regenerated cellulose, cellulose acetate and polyamide with a molecular weight cut-off equal to 5, 10 and 30 kDa were used. Th

The results of studies are presented on the treatment of natural waters with a high content of organic compounds. The research involved unit processes of coagulation, microfiltration, and the hybrid process coagulation– sedimentation–microfiltration. In the membrane filtration process 19-channnel ce

The separation of monovalent (Na+, K+) and divalent ions (Ca2+, Mg2+) from binary and ternary mixtures by electrodialysis was compared using various salt combinations (NaCl, NaNO3, KCl, KNO3, K2SO4, Na2SO4, CaCl2, Ca(NO3)2, MgCl2, Mg(NO3)2) at room temperature using a constant flow rate. The efficie

One way to produce fuel gases is using bioreactors producing CH4/CO2, H2/CO2 and CH4/H2/CO2 gas mixtures. This method has many advantages; for example, low energy consumption, high ecological efficiency, utilization of organic wastes, accessibility and simplicity of hardware implementation. The resu

It was found that the effective diffusion coefficient of Ni2+ in a macroporous strongly acidic cation-exchange resin, which was determined with the electromigration method, depends on acidity and flow rate of the solution. The values of diffusion coefficient were found to be 1.18×10!13-1.9×10!12 m2