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 73
- Downloads 0
TRANSFORMATIONS OF BENZO-15-CROWN-5, [3.3]DIBENZO-18-CROWN-6 AND [4.4]DIBENZO-24-CROWN-8 IN AQUEOUS SOLUTIONS OF NITRIC ACID
Peculiarities of benzo-15-crown-5 (I), [3.3]dibenzo-18-crown-6 (II), and [4.4]diben zo-24-crown-8 (III) nitration by the dilute nitric acid and the mixture HCl-HNO3(4:1, «aqua regia») at room temperature are discussed. I...
DEVELOPMENT OF METHOD FOR THE SYNTHESIS OF POLYURETHANES BRANCHED STRUCTURE CONTAINING ISOCYANURATE FRAGMENTS IN MACROCHAINS. STUDY THEIR STRUCTURE AND PROPERTIES
Based polyoxypropylene glycol, TDI, isocyanurate HDT-90 and a chain extender – adipic acid dihydrazide (ADH) at different molar ratio of isocyanurate of TDI and polymeric materials synthesized new branched structure. The...
COLLOID-HYDRODYNAMIC REGULATIONS OF THE FLOTATION CHROM (IV) WITH VIOLATION
This paper presents theoretical and experimental studies of the regularities of colloid-hydrodynamic interactions of small particles and a collectively rising air bubble in a model and real system using finely dispersed...
SYNTHESIS OF BENZOFURAN DERIVATIVES ON THE BASIS OF N-ACYL-1,4-BENZOQUINONE MONOIMINES
Earlier it was found the structure of the reaction products of 1,4-benzoquinones and N-arylsulfonyl-1,4-benzoquinone monoimines with acetylacetone imines depends on the structure of the reagents and the experimental cond...
THERMODYNAMICS OF ETHANOLAMMONIUM CATIONES DISSOCIATION IN AQUEOUS SOLUTIONS
The literature data on the thermodynamics of ethanolamines onium cations dissociation have been systematized and generalized. The correlation between these cations dissociation thermodynamic functions (DH and DS) and phy...