Obtaining potassium and sodium nitrates from the mother liquid of coal waste from the shurab deposit for the purpose of obtaining organomineral fertilizers

¹ Research Institute for sustainable development and green economy International University of Tourism and Entrepreneurship of Tajikistan, 48/5, Borbad Av, Dushanbe, 734055, Republic of Tajikistan
² Branch of Moscow State University named after M.V. Lomonosov in Dushanbe, 35/1, Bokhtar St., Dushanbe, 734002, Republic of Tajikistan
³ Kulyab State University named A. Rudaki, 16, Sangak Safaf St., Kulob, 735360, Republic of Tajikistan

^* Corresponding author: This email address is being protected from spambots. You need JavaScript enabled to view it.

Abstract

This paper presents the results of a physicochemical analysis of potassium nitrate, sodium nitrate, and humic acids obtained from mother liquors obtained from local coals. These analyses demonstrate that sodium hydroxide solution should be used to increase the extraction rate of humic acids in the extract, while potassium hydroxide solution is used to produce an effective plant growth stimulator containing valuable nutrients. The article also presents the results of analyses to determine the functional groups in the original and oxidized coals and in humic acids. The results showed that the total amount in the oxidized coal is 10.77 mg-eq/g, which is 5.26 units higher than in the original coal. The article also notes that after filtration, the resulting mass is separated into liquid and solid components. A study of the main composition of the filtrate and wash water revealed the presence of humic acids, confirming the possibility of using the wash water as a mother liquor in the production of organomineral fertilizers and other useful products. The study established all the optimal conditions and parameters for coal oxidation to produce humic acids, organomineral fertilizers, and other useful products.