The availability of clean water is a challenge around the world. In recent decades, environmental pollution through the excessive discharge of organic and inorganic water in water contributes to large quantities of wastewater. These halts are a major threat to the surrounding ecosystem and human health if they are not treated before being discharged into the environment. Therefore, there is an increasing attraction for the development and improvement of more accessible methods for wastewater treatment. Today, the adsorption, as a method for purifying the waters from pollutants, is paid great attention because it represents a simple, efficient and economical method, which gives the opportunity to apply a large number of natural and synthetic adsorbents. In the group of natural adsorbents that are used to remove water from the water systems, there are more materials, such as: inorganic materials, activated carbon based on biomass, agricultural solid waste, biosorbents and microbial biomass.
The first experimental works for adsorption of gases on zeolites and the influence of molecular-sieve properties was made on natural materials by F. Gradian who studied adsorption of gases on dehydratited zeolites. The ability of adsorption properties of the zeolites is determined by two factors, character of the porous structure and the heteropolar character of the polar centers. In our research adsorption is determined with water vapor by a static-gravimetric method. The results are presented in tables and graphic dependence is represented by adsorption isotherms in Langmuir 's coordinates.
Food is not just a pleasure in life, it is also an important factor for our health. Human nutrition is a mixture of nutrients, which are the only source of energy needed for survival. Energy-poor diet endangers many life functions, and above all the working ability. In the world, the meaning of the diet is very serious, and hence the demands for a -rational, healthy and safe diet are growing. Human nutrition contains saturated and unsaturated fatty acids. Essential fatty acids (EFAs) must be ingested in everyday diet because the body does not produce it. They are very important for human health. They are present in each cell of the human body and are an important factor for the normal growth, development and functioning of cells, muscles, nerves and organs. They are also used in the production of certain hormones -such as prostaglandins, which are crucial for the performance of certain important processes. The deficit from EFAs is due to a number of health problems, including more serious diseases Резиме: Храната не е само задоволство во животот, таа е исто така важен фактор за нашето здравје. Човековата исхрана претставува мешавина од хранливи материи, кои се единствен извор на енергија потребна за опстојување. Енергетски сиромашната исхрана загрозува многу животни функции, а пред се работната способност. Во светот значењето на исхраната е многу сериозно, па од таму и барањата за рационална, здрава и безбедна исхрана се се поголеми. Човековата исхрана содржи заситени и незаситени масни киселини. Есенцијалните масни киселини (EFAs) неопходно е да се внесуваат при секојдневниот режим на исхрана бидејќи телото не ги произведува. Тие се многу важни за здравјето на човекот. Присутни се во секоја клетка од човековото тело и битен фактор се за нормалниот раст, развој и функционирање на клетките, мускулите, нервите и органите. Се користат и во продукција на одредени хормоникако на пример простaгландините, кои што се клучни за одвивање на одредени важни процеси. Дефицитот од EFAs се јавува поради низа здравствени проблеми, вклучувајќи ги тука и потешките заболувања Клучни зборови: храна, есенцијални масни киселини, простагландини. ВОВЕДЕсенцијалните масни киселини (EFAs) неопходно е да се внесуваат при секојдневниот режим на исхрана бидејќи телото не ги произведува како такви. Тие се многу битни за здравјето на човекот. Присутни се во секоја клетка од човековото тело и битен фактор се за нормалниот раст, развој и функционирање на
Within this paper, investigations were carried out in order to obtain data for determining the maximum absorption capacity and the conditions in which the balance in the systems occurs: Mn2+ ions - expanded perlite and Mn2 + ions - carbonized sunflower husks. A series of tests were performed using model solutions of Mn2+ ions with different concentrations.Experimental data obtained by the equilibrium absorption of the systems: Mn2+ ions - expanded perlite and Mn2+ ions - carbonized sunflower husks are fitted with four commonly used isotherms: Langmuir, Freundlich, Langmuir – Freundlich and Redlich – Peterson, with the application of MATLAB/Curve Fitting Toolbox. The obtained results from analyzes are shown graphically and tabular, after which a comparison of the adsorption characteristics of the two adsorbents is performed.
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