Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1992-02-25
1993-03-02
Sever, Frank
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
210638, B01D 6144
Patent
active
051906287
ABSTRACT:
A method and apparatus for selectively removing species of ions from an area of soil. Permeable membranes 14 and 18 impregnated with an ion exchange resin that is specific to one or more species of chemical ions are inserted into ground 12 in close proximity to, and on opposing sides of, a soil area of interest 22. An electric potential is applied across electrodes 26 and 28 to cause the migration of ions out of soil area 22 toward the membranes 14 and 18. Preferably, the resin exchanges ions of sodium or hydrogen for ions of mercury that it captures from soil area 22. Once membranes 14 and 18 become substantially saturated with mercury ions, the potential applied across electrodes 26 and 28 is discontinued and membranes 14 and 18 are preferably removed from soil 12 for storage or recovery of the ions. The membranes are also preferably impregnated with a buffer to inhibit the effect of the hydrolysis of water by current from the electrodes.
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Constant Richard E.
Dixon Harold M.
Moser William R.
Sever Frank
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