Alkaline Extraction of Organomineral Potassium Humate from Coal Mining Waste

Abstract

Organomineral potassium humate was extracted from coal mining waste from the Lenger deposit (Turkestan region, Kazakhstan) by alkaline extraction using an aqueous solution of potassium hydroxide. The time and temperature of the process were investigated for the degree of extraction and yield of the product. A comprehensive study of the physicochemical properties of the raw material and the resulting production potassium humate was carried out by chemical analysis, scanning electron microscope, energy dispersion, IR-Fourier spectrometric and X-ray diffractographic analyses. The maximum degree of extraction and yield of the product wasachieved at 80 °C and 90 min. Moreover, the experimental data were subjected to kinetic processing, as a result of which it was established that the process of extraction of potassium humate occurs in the external diffusion region.

Changes in the Physicochemical Characteristics of Humic Acids in a Hydrodynamic Rotor-Pulsation Apparatus

“…The high metabolic capacity of humic acids opens up wide opportunities for the production of ion-exchange sorption materials based on them, intended for the purification of waste and process waters from heavy metal ions [2][3][4][5][6][7][8], as well as humic preparations for planting desert saline areas [9][10][11][12]. The specific conglomerate of properties of humic acids' lipophilic-hydrophilic structure provides this class of natural polymers with the possibility of using them as a selective sorbent of non-polar hydrocarbons in natural environments, reclamation of areas contaminated with non-polar hydrocarbons [13][14][15][16][17][18].…”