Abstract

Increased demand for agricultural products leads to soil depletion and increased use of mineral and organo-mineral fertilizers. Mineral fertilizers used in agriculture may contain contaminators such as heavy metals or radionuclides that can migrate and accumulate in plants. Although migration and accumulation abilities directly depend on species in which they are presented. Determination of species of heavy metals and radionuclides can be done by sequential extraction technique, which takes long time and a lot of reactants. Preliminary evaluation can be done on the basis of data of simultaneous thermal analysis. In the present study the simultaneous thermal analysis was used for investigation of mineral fertilizers, purchased in Almaty. “Fasko” with ammonia nitrate and “Bujskie udobreniya” fertilizers contain water-soluble fractions and “Ljubo zeleno” and “Fertika” contain organic soluble fractions.

Highlights

  • Kazakhstan is a developing country with a growing population and evolving economics [1]

  • Seven samples of mineral fertilizers were purchased in Almaty, namely, “Fasko” granulated superphosphate, “Fertika” organo-mineral fertilizing mixture for vegetables, “Bujskie udobreniya” monopotassium phosphate, “Fasko” fertilizer including ammonia nitrate, “Ljubo zeleno” fertilizer, “Ogorodnik” double superphosphate, “Ogorodnik” phosphate fertilizer

  • Seven thermogravimetric differential scanning calorimetry (TG/DSC) curves were obtained as a result of simultaneous thermal analysis

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Summary

Introduction

Kazakhstan is a developing country with a growing population and evolving economics [1]. Agriculture plays a significant role in the development of economics of the country. Mentioned economics sector is developing all around Kazakhstan and, especially, in southern regions of Kazakhstan due to better climate conditions and access to water resources. South Kazakhstan is the region with biggest population density in the country, two of three megapolises, i.e. Shymkent and Almaty, are situated in the south. The biggest issues in application of fertilizers are use of fertilizers above normal concentrations and the contamination of mineral fertilizers with toxicants. Species of contaminators is a cause for concern, because it determines migration ability of toxicant and probability of their migration into edible parts of plants [4].

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