Multifunctional Composite Materials Based on Anion Exchangers Modified with Copper Compounds-A Review of Their Synthesis Methods, Characteristics and Applications.

As copper and its compounds are of fundamental importance for the development of innovative materials, the synthesis of composites intended for water purification was undertaken in which submicron copper containing particles were dispersed within the matrix of a strongly basic anion exchanger, with a macroporous and gel-like structure. Due to their trimethylammonium functional groups, the host materials alone exhibited an affinity to anionic water contaminants and antimicrobial properties. The introduction of such particles as CuO, CuO, metallic Cu, CuO/FeO(OH), CuO, Cu(OH), Cu(OH)SO, Cu(OH)Cl increased these properties and demonstrated new properties.

Copper Rich Composite Materials Based on Carboxylic Cation Exchangers and Their Thermal Transformation.

The effect of a cupric deposit (Cu, CuO) on the thermal decomposition of carboxylic cation exchangers (CCEs) is not known, and such studies may have practical significance. CCEs have a very high ion exchange capacity, so an exceptionally large amount of CuO (which is a catalyst) can be precipitated inside them. Two CCEs, macroreticular (Amberlite IRC50) and gel-like (Amberlite IRC86), served as a polymeric support to obtain copper-rich hybrid ion exchangers.

Weakly Hydrated Anion Exchangers Doped with CuO and Cu Particles-Thermogravimetric Studies.

Hybrid ion exchangers (HIXs) containing fine CuO and Cu particles were subjected to thermal analysis in order to determine their hygroscopic water content (with regard to their anomalously low porosity) and to determine the effect of the oxidation state of the copper atom in the deposit on the thermal properties of composite materials. Commercially available anion exchangers, Amberlite IRA 900Cl (macroreticular, M) and Amberlite IRA 402OH (gel-like, G), were used as supporting materials. M/CuO, G/CuO, M/Cu and G/Cu, containing 4.

Cu(II)-Fe(III) oxide doped anion exchangers - Multifunctional composites for arsenite removal from water via As(III) adsorption and oxidation.

The aim of the present study was to investigate As(III) oxidation and adsorption on the surface of hybrid anion exchangers containing Cu(II)-Fe(III) binary oxide deposited in their porous structure with the same Cu:Fe ratio of 1:2 but with different amounts and distribution of inorganic deposit within polymeric beads. The equilibrium studies confirmed high adsorption capacity of the best hybrid polymer: 94.4 mg As/g.

Evaluation of hybrid anion exchanger containing cupric oxide for As(III) removal from water.

The aim of this study was investigate of arsenite adsorption on a hybrid polymer based on a polystyrene/divinylbenzene macroporous anion exchanger containing cupric oxide deposited within its porous structure. The study included batch kinetic and equilibrium experiments, and investigation of influence of the pH, regeneration of spent adsorbent and the column process on arsenic(III) adsorption. The experimental data were evaluated using kinetic, isotherm and fixed-bed column models.

Oxidation of As(III) in aqueous solutions by means of macroporous redox copolymers with N-chlorosulfonamide pendant groups.

The possibility of oxidizing As(III) to As(V) in aqueous solutions by means of heterogeneous oxidants, i.e. synthetic macromolecular redox compounds, was studied.

[A comparative evaluation of combined immunocorrective therapy in rheumatoid arthritis with systemic manifestations (joint Soviet-Polish research)].

Thirty-two patients with rheumatoid arthritis were included in the trial. Each of them was assigned to one of the 4 groups comparable by the main features. Each group entered 8 patients.

The effect of piracetam on the central action of ethanol in mice and rabbits.

The effect of combined single administration of ethanol and piracetam on the rabbit EEG and on locomotor activity and ethanol sleep in mice was investigated. In addition, the effect of prolonged administration of piracetam together with ethanol on rabbit EEG and after-discharges evoked by electrical stimulation of the hippocampus was studied. The blood ethanol concentrations were also monitored.