Electrolysis: processes – compositions used therein – and methods – Electrolytic material treatment – Water – sewage – or other waste water
Patent
1995-06-20
1997-02-04
Phasge, Arun S.
Electrolysis: processes, compositions used therein, and methods
Electrolytic material treatment
Water, sewage, or other waste water
205754, 205758, 205760, 205771, 205772, C02F 1461
Patent
active
055994377
ABSTRACT:
A waste solution containing electroactive species, e.g., metal ions, can be remediated to very low levels of contaminant by an electrolysis method including the steps of introducing an electrolyte containing an electroactive species into an electrolytic cell having a cathode and an anode, producing a flow of the electrolyte past at least one of the electrodes at an electrolyte flow rate, and passing an electric current through the solution between the anode and the cathode whereby the electroactive species undergoes an electrochemical reaction at one of the electrodes at an electrochemical reaction rate, using an electric current pulsed at a frequency of 0.5 to 1000 Hertz and a duty cycle of not greater than 50%, and adjusting the electrolyte flow rate for the pulsed current electrolysis such that the electrochemical reaction rate for pulsed current electrolysis is greater than the electrochemical reaction rate for direct current electrolysis. The method is especially useful in increasing the efficiency of electrolytic remediation of metal-containing waste solutions to low levels of metal ion contaminants. The method is preferably conducted using electrodes having very high surface area, optionally coated with an ion exchange resin.
REFERENCES:
patent: 3766034 (1973-10-01), Veltman
patent: 3884782 (1975-05-01), Pittman et al.
patent: 3928152 (1975-12-01), Harvey et al.
patent: 3957504 (1976-05-01), Ho et al.
patent: 4043377 (1977-10-01), Schlain et al.
patent: 4141804 (1979-02-01), Avedesian et al.
patent: 4146447 (1979-03-01), Houlachi et al.
patent: 4169029 (1979-09-01), Smirnov et al.
patent: 4216064 (1980-08-01), Penchev et al.
patent: 4396474 (1983-08-01), Astruc et al.
patent: 4597842 (1986-07-01), Evans
patent: 4800005 (1989-01-01), Rosenfield et al.
patent: 4913779 (1990-03-01), Lacoste
patent: 5049248 (1991-09-01), Muralidhara et al.
patent: 5200054 (1993-04-01), Glenn et al.
Baily, D., et al., Plating and Surface Finishing, vol. 75(4), pp. 26-31 (1988 Apr.).
Giordano, N. et al., Electrochimica Acta, vol. 35(9), pp. 1411-1421 (1990).
Walsh, F. C. et al., Transactions of the Institution of Chemical Engineers, vol. 68, pp. 107-114 (1990 May).
Zhou, C. D. et al. Plating and Surface Finishing, vol. 80, pp. 69-78 (1993 Jun).
Ibl, N., "Current Distribution in Pulse Plating", Proceedings of AESF 2nd Int'l. Pulse Plating Symposium (1981).
Chin, D.-T., J. Electrochem. Soc., vol. 130, pp. 1657-1667 Aug. & 1983) (best copy available).
Chin, D. T., et al., Electrochimica Acta, vol. 37(11), pp. 1927-1934 (1992).
Vilambi, N. R. K. et al., Plating and Surface Finishing, vol. 75, pp. 67-73 (Jan. & 1988).
Zhou, C. D. et al., Plating and Surface Finishing, vol. 81, pp. 70-78 (1994 & Jun.).
Renz Robert P.
Sunkara Mahendra K.
Taylor E. Jennings
Zhou Chengdong
Faraday Technology, Inc.
Phasge Arun S,.
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