THE RESEARCH OF PROCESS OF LEACHING OF COALCONCENTRATING DUMPS IN POTENTIOSTATIC MODE
Journal Title: Вісник Одеського національного університету. Хімія - Year 2015, Vol 20, Issue 2
Abstract
Determination of influence of potential value of discharge on process of leaching of dump of technogenic origin by mineral solution was the purpose of the research. Object of the research was dump of technogenic origin with long term of natural storage. The electrochemical researches were carried out on the potentiostat ПИ 50.1. in a two-chamber three-electrode cell in mineral solution at a temperature 30°С during 14-15 days. I-E curves before and after the discharge at potential deployment from stationary to cathode or anode area in interval of -0,05÷1,0 V and speed of scanning of potential 20 mV/s were taken. The leaching in potentiostatic mode at potentials 0,65 and 0,25 V was carried. It was established, that the process of leaching for system dump + nutritious environment at potential of discharge 0,65 V occurs only when in solution are present ions Fe2+. At decrease of concentration of ions Fe2+up to minimal, current of discharge decreases up to zero, and process is slowing down for 2 day. At potential of discharge 0,25 V the process of leaching lasts for all the time of experiment, because of electrochemical reduction of ions Fe3+, and in solution is supporting necessary concentration of ions Fe2+. The maximal сapacitance, deter-mining the speed of leaching, for potential 0,25 V is observed on 6-7 day for all 4 stages on a discharging curve.
Authors and Affiliations
A. A. Dzhambek, O. I. Dzhambek, I. A. Blayda, T. V. Vasyleva, L. I. Slyusarenko
Keywords
Related Articles
- EP ID EP408772
- DOI 10.18524/2304-0947.2015.2(54).50630
- Views 74
- Downloads 0
ADSORPTION OF IONS LANTAN ON KAOLIN
The results of studies of the adsorption of lanthanum ions from aqueous solutions of kaolin are presented. It has been shown that kaolin is a fairly effective adsorbent of lanthanum ions from aqueous solutions with diffe...
RECONSTRUCTION OF CALCINED Zn -Al LAYERED DOUBLE HYDROXIDES DURING TETRACYCLINE ADSORPSION
Zn-Al mixed oxides containing ZnO different degree crystallinity were obtained by calcinations of Zn-Al layered double hydroxides (LDHs). The reconstruction of calcined Zn-Al LDHs has been performed under stirring in aqu...
EFFECTS OF KUYALNIK ESTUARY DEGRADATION (NORTHWEST BLACK SEA REGION, UKRAINE )
Based on the generalization of multiyear (2000-2013) comprehensive hydrological and hydrochemical research of Kuyalnik estuary aquatic and terrestrial ecosystems we identified causes and consequences of the degradation o...
LIFE AND SCIENTIFIC ACTIVITY OF PROFESSOR ALEXANDER A. VERIGO
Imperial University (now – I.I.Mechnikov Odessa National University) is reviewed. Alexander A. Verigo was born in Vitebsk region on November 23 (December 5), 1837. He studied in St. Petersburg, first at the commercial co...
SYNTHESIS AND PROPERTIES OF TETRAOCTYLAMMONIUM SALTS OF 4,5-DISUBSTITUTED NAPHTHALIMIDES
The tetraoctylammonium salts of 4,5-dichloro-1,8-naphthalimide, 4,5-dibromo-1,8-naphthalimide, 4,5-dinitro-1,8-naphthalimide and 4-bromo-5-nitro-1,8-naphthalimide were synthesized with high yields of 93-96 %. The synthes...