electroosmotic dewatering 1999
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- electroosmotic dewatering 1999
Laboratory experiments were conducted to examine the feasibility and determine the optimal voltage gradient of electrokinetic consolidation of Wenzhou clay slurry with a small amount of fine sand. During the process of electrokinetic dewatering using high voltage gradients of 0.5-1.25 V/cm, the current, temperature, drainage, evaporated water, …
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However, most research has concentrated on pressurised electroosmotic dewatering (PED), that is, the application of a DC electric field during the expression of formed cakes or porous media (Sprute and Kelsh, 1980, Lockhart, 1983a, Iwata et al., 1991, Barton et al., 1999; Weber and Stahl, 2002b).
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The electroosmotic dewatering efficiency under the constant electric current is compared with that under the constant voltage, concerning dewatering rate, water content in dewatered sludge and ...
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The U.S. Department of Energy's Office of Scientific and Technical Information
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Electroosmotic dewatering of sedimented suspensions of sodium kaolinite clay, both partly and fully drained, was studied using inert electrodes at voltages from 1 V to 50 V. Dewatering at each ...
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during electroosmotic dewatering of a suspension of cellulose nanocrystals are shown in Fig. 2 for an applied electric field strength of 5 V/cm. The solid content of the cellulose nanocrystals increased from 2.3 to 15.3 wt%. Electroosmotic dewatering was thus used to remove more than 85% of all water from the initial suspension.
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In this methods of dewatering, a wall of frozen clay is made by, freezing the moist soil of the area where the excavation is to be carried out.. The process of freezing method of dewatering is as follows:. Large pipes of 10 to 15 cm diameter are laid in the ground around the area where excavation is to be done. The spacing between such …
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Volume 17, 1999 - Issue 3. Submit an article Journal homepage. 50 Views 3 CrossRef citations to date ... Original Articles. ELECTROCHEMICAL TREATMENT OF TUMORS (ECT): ELECTROOSMOTIC DEWATERING (EOD) AS THE PRIMARY MECHANISM. Ashok K. Vijh Institut de recherche d'Hydro-Quebec (IREQ), …
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(1999). 17:497 – 522. [8] Shirato ... An attempt is made to elucidate the electrochemical aspects of the electroosmotic dewatering (EOD) of clays as reported in some recent work, especially that ...
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Download PDF. Now Reading: An increasing body of evidence (1,4,5) suggests that reversal of electrode polarity or current direction during electro-osmosis …
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This preliminary investigation led to the development of a pilot-scale operation for the production of kelp meal, and the kelp after treating chemically and draining was …
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The electroosmotic dewatering process completely terminates after certain time periods as shown in Fig. 8. 3.3. Effect of Electromigration on Soil Strength Variation. After termination of electroosmotic dewatering process, the electromigration still continues, under the applied electric gradient, at a very slow rate, until eventually cracks …
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Nov 1999; P. R. M Silva; M. A. El Khakani; Boris Le Drogoff ... Electrode kinetic and electro-kinetic effects in electroosmotic dewatering of clay suspensions. Article. May 1997; Ashok Vijh;
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Jajuee et al. [70] patented a continuous electrokinetic process for dewatering oil-sand tailings, which consisted of an auger and perforated tube.The auger shaft and the tube served as the anode and cathode, respectively. Laboratory-scale experiments performed on a 2.54 cm diameter tube with an electric field of 40 V/cm demonstrated …
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Besides the sludge dewatering area, studies have focussed on EK remediation of soil, implanting two electrodes in soil beds either vertically (Ho, Athmer, Sheridan, & Shapiro, 1997) or horizontally (Ho et al., 1999) achieving removal of more than 90% of the metals; this metal removal was also observed in an improved EK process …
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The experiments of Yoshida et al. (1999), with different frequencies, showed that the best dewatering results were achieved by the lowest reversal frequency tested, …
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electroosmotic consolidation lag behind the experimental research and are quite different from engineering practices because most models assume that the physical parameters of soil remain unchanged under small strain conditions. Hence, researchers have conducted a …
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Electroosmosis is a phenomenon describing water molecules being dragged along as solvation shell by the protons, which are conducted from anode to cathode. The electroosmotic coefficient Cdrag corresponds to the water molecules, transported by a single proton (see Eq. 3.9 ), (3.9) C drag = j drag F i.
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A technique known to improve the dewatering drastically, both with regard to dewatering rate as with regard to final solids content, is electro-osmosis ( Yukawa et al., …
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The dewatering can be improved drastically by the use of electro-osmosis, a technique in which a direct current electric field is applied to the filter cake, inducing an …
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nation 1999, 8 (6), 617–635. ... Vacuum Preloading Combined with Electroosmotic Dewatering of Dredger Fill Using the Vertical-Layered Power Technology of a Novel Tubular Electrokinetic ...
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electroosmotic dewatering of tumors. necrosis caused by electroosmotic dewatering (EOD) A recent series of experimental papers on the electrochemical …
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Seeking new and efficient methods for dewatering, many authors (Yoshida, 1993, Barton et al., 1999, Gingerich et al., 1999) exploited electro-osmosis in order to …
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Electroosmotic dewatering of dredged sediments: bench-scale investigation. J. Environ. Manag. (2006) ... 2009), coal fly ash (Fang et al., 1999) and lime (Fang and Wong, 1999) could decrease the leaching risk of heavy metals and simultaneously improve the dewaterability by maintaining the sludge permeability during filter pressing; Liu et al ...
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Abstract. This work aims at providing an outline of engineering applications for electroosmosis, especially for sludge dewatering. A review of the theoretical analysis of electroosmotic dewatering ...
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Reuss conducted his second experiment [] in which two glass tubes were filled with water and a thin layer of well-washed sand was kept at the bottom (Fig. 2).In this setup, Reuss observed that by applying an external electric field, the sand at the bottom of the positive tube swelled upward and tended to penetrate the sand layer (demonstrated …
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The various parameters affecting electroosmotic dewatering were cylinder pressure (1000 kPa–3000 kPa), applied voltage (12 V–36 V) and pre-soaking time of the flax stem (12 h–36 h). An ...
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The electroosmotic dewatering allows accelerating the consolidation and increasing the dewatering of semi-solid materials and relies on the electroosmosis (moving of ionized mobile liquid close to the particles surface due to the external electric field). ... Lite and Xiuqu, 1999, Xia et al., 2003, Al-Asheh et al., 2004, ...
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Electroosmotic dewatering under AC electric field with periodic reversals of electrode polarity. Dry. Technol., 17 (1999), pp. 539-554. CrossRef View in Scopus Google Scholar [24] M. Citeau, O. Larue, E. Vorobiev. Influence of filter cell configuration and process parameters on the electro-osmotic dewatering of sewage sludge.
به خواندن ادامه دهیدThe unidirectional migration of electroosmotic flow under direct current electric field has remained an issue of previous studies such as seriously uneven strength and difficult drainage collecting, which primarily limited the practical engineering applications of electroosmosis method. Innovative cyclic and progressive electroosmosis method …
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Filtration combined with an electric field (electrofiltration) enhances the filtration kinetics of aqueous suspensions. Although electrophoresis and electroosmosis largely contribute to electrofiltration behavior, side effects such as water electrolysis, heat production, and gravitational sedimentation of particles may be influential.
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Published: July 1999; Electrochemical field effects in biological materials: electro-osmotic dewatering of cancerous tissue as the mechanistic proposal for the electrochemical treatment of tumors. A. K. Vijh 1 Journal of Materials Science: Materials in Medicine volume 10, pages 419–423 (1999)Cite this article
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