Paper: Electrokinetic dewatering of mine tailings from
Abstract: Fine-grained tailings (leach residue and gypsum) resulting from hydrometallurgical processes (acid leach followed by lime neutralisation) of nickel laterite ores are proving difficult to dewater using conventional dewatering methods (thickeners/vacuum filters). To generate a dense non-segregating slurry or paste that can be deposited on surface in the …
Laboratory evaluation of electrokinetic dewatering of …
Electrokinetic stabilization is a promising method to dewater and expedite the settlement of the dredged marine sediments. However, the placement of electrodes …
Fundamental of Electrokinetic Processes | SpringerLink
From a soil treatment perspective, application of electric fields in soil throughout a set of electrodes is a very important topic because it generates the phenomena in which most of the electrochemically assisted soil remediation processes are based [1,2,3].In this context, although sometimes the remediation of soil using …
A Study on Electrokinetic Dewatering of Saturated Soil
Rotte et al. [ 19] studied the factors affecting the efficiency of electrokinetic dewatering of saturated soil. It was observed that an increase in voltage and pH increases the efficiency of electrokinetic dewatering. However, the effect of the spacing of electrodes needs a more elaborate study.
Electrokinetic dewatering, consolidation and stabilization of …
Semantic Scholar extracted view of "Electrokinetic dewatering, consolidation and stabilization of soils" by L. G. Adamson et al. ... THE GENERAL THEORY OF ELECTRO-OSMOSIS IN SOILS IS PRESENTED, ANALYSED ON THE BASIS OF OLD AND NEW EXPERIMENTAL EVIDENCE AND REDUCED TO A FORM WHICH CAN BE EASILY …
Electrokinetic geosynthetic dewatering of nuclear …
In this context, this study conducts electrokinetic dewatering tests on fine bauxite tailing, using samples with initial solid content by weight ranging from 20 to 30%; final values between 43 and ...
Electrokinetic Dewatering of Mine Tailings Using DSA …
Electrokinetic dewatering has been shown to be a promising technology; however, one of the challenges in its practical application is the corrosion of anodes. Recently, dimensionally stable anodes (DSAs) were developed that are virtually corrosion free. ... Characterization of the tailings is presented, followed by the results of …
Electrokinetic dewatering and thickening. I.
241 Accesses. 33 Citations. 3 Altmetric. Explore all metrics. Abstract. An introduction to electrokinetics and a historical review of electrokinetic devices is presented. Article …
Dewatering of Tunneling Slurry Waste Using Electrokinetic Geosynthetics
Laboratory experiments are described that investigate the potential for using electrokinetic geosynthetics (EKGs) [materials that permit the combined exploitation of geosynthetics with electrokinetics (EKs)] to dewater slurry waste from a tunneling operation.
Advances and challenges of electrokinetic dewatering of …
The development of electrokinetic dewatering technologies for clay and soil materials has steadily advanced for over 100 years. A review of the origins, important contributions, and recent work on the topic are presented. Research into the electrokinetic mechanisms have informed the design process and resulted in prototypes and pilot-scale …
Electrokinetic dewatering and thickening. I. Introduction …
An introduction to electrokinetics and a historical review of electrokinetic devices is presented. Skip to main content. Account. ... Sunderland, J.G. Electrokinetic dewatering and thickening. I. Introduction and historical review of electrokinetic applications. J Appl Electrochem 17, 889–898 (1987 ...
Mathematical model and optimization of continuous …
Electrokinetic dewatering has been an on-going topic of research for dewatering effluent from mining operations such as phosphatic clay. Phosphatic clay is a clay-water suspension with a solids content of 2–3 wt.% that is produced as a waste stream from the beneficiation of phosphate ores. ... The solids distribution presented in Fig. 8 …
Full scale electrokinetic dewatering of waste sludge
From an environmental point of view, electrokinetic dewatering of sludge is beneficial by reducing the energy needed for complete evaporation of remaining water, if …
Sludge dewatering by electrokinetic technique: effect of …
1.. IntroductionSludge dewatering can be accomplished by freeze–thaw, centrifuge force, mechanical press and sun-drying. The freeze–thaw method is capable of decreasing the water content of sludge to 50–60% (Knocke and Trahern, 1987, Lee and Lee, 1995) and even lower to 43% with addition of polymer electrolytes (Huang et al., …
Improved estimates of power consumption during dewatering …
Electrokinetic dewatering of fine-grained mine wastes has been attempted by Veal et al. (2000) amongst others, but with relatively little success. There are no instances of large scale implementation of the concept in this type of application. ... Based on the results presented in this paper, operating energy costs can be reduced …
Electokinetic dewatering of clay slurries as engineered
The development of electrokinetic dewatering technologies for clay and soil materials has steadily advanced for over 100 years. A review of the origins, important contributions, and recent work on ...
Electrokinetic Dewatering of Mine Tailings Using DSA …
Electrokinetic dewatering was first studied by Casagrande [5] for stabilizing weak fine-grained soils. This technique involves the application of a direct current (dc) voltage across electrodes placed ... Lockhart [7] presented laboratory results of electrokinetic dewatering for a tailings slurry, progressing from an initial solid content of 55 ...
[PDF] Electrokinetic dewatering of phosphatic clay settling …
A mathematical model is presented for the electrokinetic dewatering of suspensions of phosphatic clays. The modeling approach couples a boundary-element model for solution of Laplace's equation to a recently developed constitutive equation that relates the change in solids content with applied electric field and time. The observation …
(PDF) The Development of In-Situ Dewatering of Lagooned …
Paper Presented to 10th European Biosolids and Biowaste Conference. UK. November 2005 Lamont-Black, Glendinning, Jones, and Smith THE DEVELOPMENT OF IN-SITU DEWATERING OF LAGOONED SEWAGE SLUDGE USING ELECTROKINETIC GEOSYNTHETICS (EKG) Lamont-Black J, 1 **Glendinning S, **Jones C, *Huntley D, …
[PDF] A constitutive relationship for electrokinetic dewatering …
A mathematical model is presented for the electrokinetic dewatering of suspensions of phosphatic clays. The modeling approach couples a boundary-element model for solution of Laplace's equation to a … Expand. 6. PDF. Save. Mathematical model and optimization of continuous electro-osmotic dewatering.
Electrokinetic dewatering of a phosphate clay
The changes in water chemistry in Stage 2 are presented in Fig. 11. The data at time t = 0 represent the ionic concentrations after Stage 1 testing. After 36 h, the pH of water was neutralized to 6.7, as shown in Fig. lla. ... Electrokinetic dewatering of a phosphate clay suspension from Florida was investigated in an electrokinetic cell and …
A Study on Electrokinetic Dewatering of Saturated Soil
A Study on Electrokinetic Dewatering of Saturated Soil. January 2022. 10.1007/978-3-030-77230-7_66. In book: Advances in Transportation Geotechnics IV (pp.861-873)
Electrokinetic Dewatering of Mine Tailings Using DSA …
dewatering of tailings is a primary target in mining waste management. Electrokinetic dewatering was first studied by Casagrande [5] for stabilizing weak fine-grained soils. …
Efficient continuous electrokinetic dewatering of …
Lab-scale electrokinetic dewatering prototypes for the separation of phosphatic clay. •. Rheological measurements correlated to electrokinetic dewatering …
(PDF) Laboratory Evaluation of Electrokinetic Dewatering of …
The results of a laboratory investigation on the engineering properties of four different tailings are presented. First, some of the basic properties of the tailings are described. ... are labeled by d-spacings (Å) indicating the predominant presence of kaolinite, goethite, gibbsite and hematite. 5. Electrokinetic Dewatering Tests The tailings ...
Effect of Various Factors Affecting Electrokinetics Dewatering …
The presented paper used the process of electrokinetic dewatering to enhance the draining of water and thereby improve the strength of soft soil. The electrokinetic geosynthetics used give technical benefits over conventional electrodes in that they can be formed as strips, sheet, blankets, etc. They are light and easy to install.
Semi-Continuous Electrokinetic Dewatering of Phosphatic …
A semi-continuous electrokinetic dewatering process, representing an intermediate step in development of a technology for continuous electrokinetic dewatering of phosphatic clay suspensions, was designed and evaluated through measurement of supernatant turbidity, pH, and changes in solids content. ... and recent work on the topic …
Electro-osmosis treatment techniques and their effect on dewatering …
A qualitative illustration of this is presented in Fig. 1. An acidic front produced at the anode migrates towards the cathode, and a basic front produced at the cathode migrates towards the anode. ... Electrokinetic dewatering of a phosphate clay. J. Hazard. Mater., 55 (1997), pp. 117-133. View PDF View article View in Scopus Google Scholar.
Dewatering Sludge Using Electrokinetic Geosynthetics
Electrokinetic dewatering involves the application of a D.C Voltage across the sludge, driving water under an electrical gradient from positive (anode) electrode to negative (cathode) electrode. However, there have been several reasons why this technique has not been adopted in practice, not least because the, normally metallic, anode rapidly ...
Electrokinetic dewatering of a phosphate clay | Semantic …
Semantic Scholar extracted view of "Electrokinetic dewatering of a phosphate clay" by J. Q. Shang et al. Skip to search form Skip to main content Skip to account menu. Semantic Scholar's Logo. Search 216,175,530 papers from all fields of science. Search. Sign In Create Free Account.
