Heard about electro-osmosis?

In order to improve the underlying soil, geotechnical engineering has to do a lot with ground improvement. Ground improvement methods falls into two categories, soil improvement and direct load bearing. I read about few ground improvement works here at [U]https://www.dstgroup.com/services/geotechnical-engineering/ground-improvement/[/U] . Among the five methods (wick drain and preloading, deep compaction, stone-cement-and-lime columns, deep soil mixing, electro-osmosis) listed there, electro-osmosis is the one which I haven’t heard about. Can anyone explain the method?