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(2) Shuster, W. W., “Control of Pollu$on from Outboard Engine Exhausts: A Reconnaissance Study, 38 pp, U.S. Environmental Protection Agency, Water Pollution Control Research Series, 15020 E N N 09 ’71, 1971. (3) Ludemann, D., Helgoldnder Wiss Meeresunters., 17, 356-69 (19%). (4) Clark, R. C., Jr., Finley, J. S., in “Prevention and Control of Oil Spills,” Proc., Joint Conference on Prevention and Control of Oil Spills, Washington, D.C., March 13-15, 1973, 161-72, Am. Petroleum Inst., Washington, D.C., 1973. (5) Sparks, A. K., Pauley, G. B., J . Insect Pathol., 6, 78-101 (1964).
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Received for reuieu December 17, 1973. Accepted June 24, 1974
Treatment of Aqueous Effluents from UF,(g) + (NH4)4[U02(C03)3](~) + U02(s)Conversion H. Zafer Dokuzoguz*$ The Babcock & Wilcox Co., P.O. Box 1260, Lynchburg, Va. 24505
Henry M. Muller N u k e m G m b H , 6450 Hanau, Postfach 869, West Germany
leased to the environment. This article describes a process Increasing use of the U F ~ ( ~ ) ~ ( N H ~ ) ~ [ U O ~ ( of ~O ~ ) ~ ]the ( S effluents )~ treating generated during the UFs-AUC UO2(s) conversion process for manufacturing UO2 fuels -U02 conversion. The treatment process, tested in a has led to the development of different processes to treat pilot plant, is semicontinuous and comprises four stages the aqueous effluents generated during several stages of (Figure 5): the UOz conversion. The mixture of these effluents conA continuous COz(g) liberation circuit. tains large amounts of NH4+, c O & , F-, and a relatively A batch precipitation stage to precipitate U with Hz02 small amount of U. This article describes a novel treatas U04.2NH3-2HF. ment process comprising four main stages. These aim a t A batch system to precipitate F - with an excess amount of CaO and to distill off NH3 and H20. the recovery of C02 by acidification through a unique Rectification of NH3 solution. gas liberation circuit, the precipitation of U as U04-2NH3.2HF (a novel compound), the removal of FThe treated effluents contain
