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There are investigated sorption and desorption characteristics of phosphate cation-exchange resin among metals: copper, nickel, cobalt, an uranyl-ion depending on pH-environment, the ionic form of cation-exchange resin, concentration of investigated cations. Interaction of cation-exchange resin in Na- and H-forms with solutions of salts sulphate of copper, nickel, cobalt, chloride sodium, calcium and nitrate of uranyl is studied. It is shown, that ions of copper, nickel, cobalt and an uranyl-ion by phosphate cation-exchange resin sorb at the expense of an ionic exchange and partially at the expense of formation of coordination communications with ionogenic group of cation-exchange resin. A study of the sorption of uranyl ions depending on the concentration of uranyl nitrate in the range of 0.01-0.1 N showed that with an increase in the concentration of uranyl in the studied interval, the value of sorption of uranyl increases slightly. The studied phosphate cation exchanger has a sufficiently high sorption and desorption ability to the ions of the tested metals.

In the globalization of the modern world, the problem of ensuring national security comes to the fore, including the problem of food security. Without solving the problem of food security, it is impossible to solve a number of other social and economic problems of sustainable development. In this regard, it is necessary to note one of the main factors in ensuring food security in the agricultural sector Key words Food security, the stability of the agricultural sector, the food security index, the level of food security, high-income countries, low-income countries, the rating of countries to ensure food security

Current trends in the development of world commodity markets are explained with new market conditions: changes in the ratio of market-forming factors. Special attention is paid to the impact of the current wave of scientific approaches to the study of markets, taking into account the cyclical development of the world economy in the early twenty first century, the severity of macroeconomic shocks, the impact of scientific and technological progress, and changes in natural and climatic conditions.