During the drilling of oil wells, sometimes the digging drill passes through layers with coarse porosity which causes drilling mud loss. Concerning the preciousness of drilling mud, preventing its loss can be economically efficient and lead to a desirable drilling which increases productivity of the oil well. Due to the invaluable of the pores in different ground strata for Hydrocarbon material extraction purposes, a blocker should be used to prevent drilling mud loss. MAGNETITE Cement is used for this purpose.

Iron oxide nanoparticles (nano-Fe) have been widely used in environmental remediation, including that of emerging contaminants, such as antibiotics. MAGNETITE nanoparticles (nano-Fe3O4) have been reported to form on the outer surface of nano-Fe and have the potential to be a good sorbent for certain antibiotics. This study reports, for the first time, the kinetics and thermodynamics of adsorption of a common tetracycline group antibiotic, oxytetracycline (OTC), on nano-Fe3O4. Batch sorption kinetics were evaluated by varying initial OTC concentration (0.25-2 mM), nano-Fe3O4 concentration (2.5-20 g L-1), pH (3.8-7.6), temperature (5, 15, 35 oC), and ionic strength (0.01-0.5 M KCl) to derive thermodynamic and kinetic constants. Results show that OTC sorption kinetics is rapid and increases with increasing temperature. The derived thermodynamic constants suggest a surface chemical-controlled reaction that proceeds via an associative mechanism. Results indicate the potential of developing a nano-MAGNETITE-based remediation system for tetracycline group of antibiotics.

Nowadays nanotechnology as a new direction of science allows us to develop therapeutic methods of the endogenous intoxication syndrome and to create a new class of biocompatible sorbents. In Ukraine first preparations of medical nanotechnology were produced and patented in 1998. These are IKBB (intracorporeal biocorrector), magnet-controlled sorbent (MCS-B), and Micromage-B. The preparations are based on colloid MAGNETITE particles (Fe3O4) from 6 to 12 nm. Adsorption layer provides a high sorption activity to MAGNETITE nanoparticles. Total activity of their sorption surface is 800-1200 m2/g, magnetic field intensity produced by each particle is 300-400 kA/m, V-potential is- 19 mV. Each MAGNETITE particle is a subdomain elementary MAGNETITE of a sphere shape. The main biological action of nanotechnology preparations is directed towards regulation of cell metabolism. Therapeutic effect of this preparation is based on the influence of adsorption process and of constant magnetic field that surrounds colloid MAGNETITE particle on cellular and subcellular structures. Point of attack is surface proteins of cell membranes. Colloid MAGNETITE particles modify composition of protein molecules thereby affecting the transport of substances to a cell. Using magnet-controlled sorbent the method of extracorporal hemocorrection on the whole is more effective and reliable way to activate natural processes of detoxication of organism, than that of artificial detoxication. The absence of contra-indication and incidental effects (haematic, haemodynamic, hormone, electrolytic, immune) creates real predisposition for using this method in intensive therapy of intoxication syndrome.