Ivchenko V. Surface water and Wastewater treatment from ammonium and iron ions by the clay minerals of Sumy region

The thesis deals with the raising environmental security by developing adsorption technologies at sewage and water systems back from ammonium compounds and Iron by using local clay sorbents. The structure, chemical and mineral composition of clay rocks of the six fields of Sumy region were studied. The optimal parameters of adsorption on the local clay sorbents were studied. Isotherm and the coefficient set in the adsorption equations of Langmuir and Freundlich were created. The dependence of adsorption properties of the mineral composition of clays was experimentally confirmed. It was shown that efficient adsorption of iron and ammonium ions reached supportive presence in the structure of clays was no less than 10-15% montmorillonite. The purification of water from ammonium by sorbents with the predominance of kaolinite component is impractical because of low adsorbent activity. Developed and tested for adequacy of mathematical model mass transfer in the system "liquid - solid" in static conditions and engineering design procedure allows to set design and regime parameters of adsorption reactor. A hardware-technological scheme of water purification from iron and ammonium compounds using clay sorbents was created. Experimental-industrial testing technology treatment of iron was conducted in Sumy State Scientific Research Institute of fertilizers and pigments. Experimental studies of industrial installations have shown high quality of water used in the production technology of titanium dioxide pigment at the stage of "white" filter, and allowed to reduce the load on surface water bodies through a closed system of rinse waters.