In this paper, for characteristic polytropic change of state of ideal gas is given graphical planimetric graphical representation of the most important energy values in workplace and thermal diagram, trough the appropriate area. In this paper, we used differential forms of First and Second law of thermodynamics and basic equation which define the observed change of state, written in a suitable form. The results for the polytropic change of state, are applied to the isobaric and isochoric change of state. It is shown that any of the energy values ( q12, w12, wt12, Δh12, Δu12) can be present in both workplace (p, v) as well as thermal (T-s) diagram. Graphical solutions, compared to the analytical, provide efficient theoretical explain and presentation of various thermo-dynamical processes of ideal gas with different aspects and greatly assist a clearer view of the problem and enhance each other living arrangement. Graphical representation of external influences or energy values shown in the diagrams, make it possible to more clearly we see connection between these effects, change of state, as well as their each other relations. This is particularly evident in the case when there are (p, v) and (T-s) diagram for a particular ideal gas, which is common in technical practices (e. g., air as an ideal gas).

Red mud - a waste product in alumina production, with its physical and chemical properties can be used as a pigment in the manufacture of concrete elements and façade colors. However, the consumption of red comparing to conventional inorganic oxide pigments is at least three times higher for achieving the same intensity of color. Since the rise in quatity of pigment in the concrete can lead to an increase in small fractions and the need for water in the concrete mixture, and deterioration concrete's technical properties (decrease of hardness, frost resistance, etc...), it is necessary to eliminate that negative effect with introduction of certain supplements in red bud. This can be achieved by adding a certain amount of hydrochloric acid for neutralization of alkaline mud solution and the creation of CaCl2 in the reaction with lime contained in it, which serves as accelerator of boning and hardening of concrete mixtures. Concrete materials colored with red mud treated in such manner, in addition to increased strength also have higher color intensity. Obtained concrete elements colored with the same quantity of red mud, without dosing and with dosing of various quantities of HCl will be photographed, and the photographs will be presented in the paper. The aim of this paper/work is a synthesis of cheap red pigment with satisfactory performance.

This paper analyzes the managerial aspect in the implementation of international environmental management standard ISO 14001:2004. It is known that the implementation of this standard has all the elements of the project approach, which is the responsibility of the management of organizations (companies, institutions, etc.) is crucial. This aspect is analyzed for its impact on all other elements in the management of the environment, directly on the determination of the needs for the introduction of environmental management systems, formulation of environmental policy, planning activities, implementation plan, measure results, evaluation of results achieved, and continuous improvement. The concept of EMS (Environment Management System) is based on the introduction of a systematic and logical conditional process of environmental management in the way that affects the organization, control and prevent adverse environmental impacts that are reflected through the work of the same, and the role of the organization management and managerial approach is reflecting to the essence and form of implementation of international standards.

Mesoporous silica particles were prepared from highly basic sodium silicate solutions, having different silica modulus and SiO 2 concentrations, by adding sulphuric acid at different temperatures. Pore structure of prepared silica particles (aggregates) is strongly influenced by processing conditions and easy controllable in broad range of the specific surface area, pore size, pore volume and size distribution. It is shown that there is a clear correlation between volume of absorbed oil and processing parameters used in preparation of silica aggregates. Thus, oil absorption is higher in the samples prepared from sodium silicate solution with higher SiO 2 concentration and at higher synthesis temperature.