Mechanochemical preparation of slow release fertilizer based on glauconite-urea complexes

Maxim Rudmin, Elshan Abdullayev, Alexey Ruban, Ales Buyakov, Bulat Soktoev

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

We investigated the mechanochemical synthesis of complex slow release fertilizers (SRF) derived from glauconite. We studied the effectiveness of the mechanical intercalation of urea into glauconite using planetary and ring mills. The potassium-nitric complex SRFs were synthesized via a mechanochemical method mixing glauconite with urea in a 3: 1 ratio. The obtained composites were analyzed using X-ray diffraction analysis, scanning electron microscopy, X-ray fluorescence analysis, and infrared spectroscopy. The results show that as duration of mechanochemical activation increases, the mineralogical, chemical, and structural characteristics of composites change. Essential modifications associated with a decrease in absorbed urea and the formation of microcrystallites were observed when the planetary milling time increased from 5 to 10 min and the ring milling from 15 to 30 min. Complete intercalation of urea into glauconite was achieved by 20 min grinding in a planetary mill or 60 min in a ring mill. Urea intercalation in glauconite occurs much faster when using a planetary mill compared to a ring mill.

Original languageEnglish
Article number507
JournalMinerals
Volume9
Issue number9
DOIs
Publication statusPublished - Sep 2019

Keywords

  • Glauconite
  • Intercalation
  • Mechanochemical activation
  • Milling
  • Slow release fertilizer
  • Urea

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Geology

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