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Structural and Coordination Features of a Hydrated Nickel-Bromide Complex with Hexamethylenetetramine

The complex compound NiBr2×2(CH2)6N4×10H2O was synthesized and structurally characterized using X-ray crystallography, thermogravimetric analysis, differential scanning calorimetry, and infrared spectroscopy. The complex crystallizes in a monoclinic system (P21/c) with an octahedral nickel coordination environment, where Ni-O bond lengths range from 2.027 to 2.058 Å. Thermal analysis confirmed stability up to 150°C, followed by dehydration, HMTA degradation at 200°C, and framework breakdown above 300°C.

Adsorption of Zinc Ions in Water on Natural and Treated Clay

Adsorption of zinc ions in water on natural and treated clay has been studied. Natural clay before and after activation was characterized using TGА/DTА techniques and chemical analysis.The effects of various parameters, such as an initial concentration, temperature, pH, contact time and adsorbent concentration, has been examined. It was shown that treated clay is a good adsorbent compared to natural clay for removing Zn2+ ions and can be used instead of expensive adsorbents.

Modelling the process of thermoconvective oscillations on the boundary between Earth’s crust and mantle

A task about three-dimensional distribution of indignation of temperature in a lithosphere is taken to the decision of two-dimensional task. The equalizations and algorithms of their decisions got as a result of undertaken studies let to conduct the numeral design of the developed convection in the conditions of mantle of Earth, to investigate the thermal cooperating of convective mantle with a lithosphere, to restore distribution of temperature in overhead part of lithosphere of region.