Liquid purification or separation – Processes – Ion exchange or selective sorption
Patent
1980-01-18
1981-05-12
Castel, Benoit
Liquid purification or separation
Processes
Ion exchange or selective sorption
210683, 210903, C02F 128
Patent
active
042670578
ABSTRACT:
Water is treated to selectively remove substantially all of the nitrates present. This selective removal of nitrates is accomplished by adjusting the pH of the water to be treated, if necessary, to a pH of less than 8, and then passing the pH-controlled water through activated carbon. In one of the preferred embodiments, the spent activated carbon is substantially completely regenerated by backwashing to permit reuse of the carbon.
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Hassler J. W.; "Purification with Activated Carbon"; Chem. Pub. Co. Inc., New York, N.Y. pp. 98-102, 133, 134 & 200-203 (1974).
Hager Donald G.
Rubel, Jr. Frederick
Aluminum Company of America
Brownlee David W.
Castel Benoit
Klepac Glenn E.
Whalen Lyndanne M.
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