phosphates

The article presents the results of the study of the kinetics of ions adsorption from multi-component mixtures. The isotherms of sorption of ammonium nitrogen in the presence of phosphates indicate a decrease in the exchange capacity of zeolite due to its competition for active absorption centres. This study was carried out with two ions of inorganic nature. In the presence of the third organic component in the solution (protein substance - albumin), the sorption capacity of zeolite decreases even more in comparison with ammonium ions.

The purpose of this work was to study the process of adsorption of phosphate on natural and synthesized sorbents, such as aluminosilicates. The sorption properties of natural zeolite for phosphate under static and dynamic conditions were investigated. The zeolite on the basis of the coal fly ash of Dobrotvorskaya heat power plant was synthesized and modified. The equilibrium values of adsorption capacity were determined, and the corresponding isotherms were constructed at a temperature of 20° C. The kinetics of adsorption under mechanical mixing conditions was investigated.

The  technological  chart  of  wastewater  treatment  from  phosphates  by  application  of exhausted  adsorbent  in  which  exchangeabble  cations  are  substituted  by  the  ions  of  copper, chrome  or  zinc  is  projected  .  The  method  of  regeneration  and  repeated  application  of  the worked zeolite is offered. 

The aim of this work was studying the process of phosphate adsorption on natural and synthesized adsorbents such as aluminosilicates. Sorption properties of natural zeolite concerning phosphates in static and dynamic conditions were investigated. It was found that phosphates were absorbed better in an acidic environment. Zeolites based on fly ashes of Dobrotvir heat power plant were synthesized and modified. The equilibrium values of adsorption capacity were established and the proper isotherms at a temperature 20 °C were built.

The interaction of ε-caprolactone with methacrylic acid has resulted in formation of 6-methacryloylhexanoate which was subsequently converted into the corresponding chloroanhydride via the reaction with phosphorus trichloride. The reaction of chloroanhydride with poly(ethylene glycol) or poly(ethylene glycol) monomethyl ether yielded the corresponding surface active methacrylate monomers. During interaction of the hydroxyl group of poly(ethylene glycol) containing the monomer with the excess of phosphoryl chloride phosphate-containing monomer was synthesized.

The mechanism of phosphates sorption process on clinoptilolite was determined. The significant increase in zeolite sorption capacity was observed while interaction of zeolite and wastewaters with acid reaction. New active centers of zeolite are formed due to disalumination of its surface.