The use of glauconite for stabilization and improvement of ammonium nitrate agrochemical properties
Yu. N. Terentyev, N. V. Syrchina, N. N. Bogatyryova, T. Ya. Ashihmina, A. V. Sazanov, M. L. Sazanova, V. A. Kozvonin, A. A. Burkov, V. P. Savinykh
Section: Ecologization of industry
The development of new forms of nitrogen-containing mineral fertilizers comporting with world safety standards is
currently quite a relevant problem. Existing forms of combined fertilizers including ammonium nitrate and carbonates
have a number of disadvantages (hygroscopicity, caking, partial ammonium nitrogen decline). Therefore active search of
new components with certain advantages is conducted. At the same time, their inclusion into the fertilizers’ composition
should ensure a high level of plants’ nitrogen assimilation, exclude environmental pollution and comport with Green
Chemistry principles; low cost and the possibility of large-tonnage output in Russian Federation is also of great importance.
The quartz-glauconitic sandstone from Beloozero deposit (Lysogorsky district, Saratov region) is considered as
such a component. Its chemical composition is determined by the mass-spectroscopy with inductively coupled plasma
and atomic emission spectroscopy with inductively coupled plasma. The technique of glauconite introduction into the
combined mineral fertilizer with ammonium nitrate was tested. The ammonium nitrate and glauconite ratios are selected
to ensure the fertilizer thermostability and meet the European Union (EU) standards. The evaluation was carried out by
thermogravimetry and differential-thermal analysis. The properties of the obtained fertilizer were tested by bioassay. It
was definitely proved that the obtained fertilizer has a favorable effect on the seeds germination and seedlings development.
Thus, granulated composition containing 80% of AN and 20% of glauconite allows to decrease the nitrogen content
in the fertilizer finished form to 27–28%, which provides the fire-safety and explosion-safety required level, eliminates the
risk of pellets caking during storage, promotes an increase in fertilizer’s agrochemical efficiency and allows to decrease
the fertilizer’s application rates and, consequently, to reduce the environmental burden.
ISSN 1995-4301
Select viewing options
