Open AccessELECTROKINETIC DENSIFICATION OF COAL FINES IN WASTE PONDS
Author(s) -
E James Davis
Publication year - 1997
Language(s) - English
Resource type - Reports
DOI - 10.2172/757302
Subject(s) - electrokinetic phenomena , particle (ecology) , flocculation , coal , colloid , colloidal particle , particle size , dewatering , chemical engineering , electrochemistry , environmental science , materials science , waste management , electrode , chemistry , environmental engineering , nanotechnology , engineering , geology , geotechnical engineering , oceanography
The objective of this research is to demonstrate that electrokinetics can be used to remove colloidal coal and mineral particles from coal-washing ponds and lakes without the addition of chemical additives such as salts and polymeric flocculants. In this experimental and analytical study the authors elucidate the transport processes that control the rate of concentrated colloidal particle removal, demonstrate the process on a laboratory scale, and develop the scale-up laws needed to design commercial-scale processes. They then address the fundamental problems associated with particle-particle interactions (electrical and hydrodynamic), the effects of particle concentration on the applied electric field, the electrochemical reactions that occur at the electrodes, and the prediction of power requirements