Processing of Phosphoric Solid Waste by Humic Acid Leaching Method

Abstract

This article presents the results of research on the leaching of solid phosphorus-containing waste with humic acid. Such waste includes the by-products of the electrothermal processing of phosphate raw materials—phosphorus sludge and cottrel dust. Chemical and X-ray diffraction analyses have been used to study their composition and phase structure, according to which these substances have an amorphous structure. The leaching of phosphoric sludge and cottrel dust was investigated by varying the main parameters. The obtained data were processed using the method of formal kinetics to study the features of the process. The reaction rate constants and the apparent activation energy were calculated, and the values found made it possible to determine that the process under study is limited by diffusion. The scientific novelty of the article is the use of humic acid for leaching phosphoric solid waste as opposed to traditional methods. This new method may offer improved efficiency, reduced environmental impact, and a potential alternative solution for the processing of phosphoric waste.

Methods for Obtaining Phosphorus-Containing Fertilizers Based on Industrial Waste

“…On the basis of chemical analysis in the composition of cottrel dust, P 2 O 5(total) ) -30.7%, P 2 O 5 (assimilable) -17.2% and there are light alkali and earth metals. According to the results of two studies, it is sufficient to use cottrel dust for mineral fertilizers [11][12][13].…”

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

“…Thus, the presented experimental study results of humic acids' physical-and colloidal-chemical properties indicate the unique properties of this class of natural compounds and, above all, in the field of their application for solving environmental protection and agricultural problems. 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].…”

Mining waste as a base for the formation of technogenic minerals

“…Гірничопромислові відходи є цінною техногенною сировиною для промисловості [3,4], які, як правило, характеризується складним хімічним, мінералогічним і петрографічним складом, оскільки в процесі тривалого зберігання у відвалах, хвосто-та шламосховищах відбуваються гіпергенні перетворення, в результаті яких склад компонентів змінюється, утворюються техногенні мінерали [4].…”

“…Для кожного типу мінеральної сировини визначено відповідні гірничопромислові відходи (рис. [1][2][3][4][5][6]. Загальний поділ гірничопромислових відходів передбачає їх розташування у сховищах відходів видобутку та відходів переробки корисних копалин.…”