TAILIEUCHUNG - Báo cáo "Study of the Treatment of the Liquid Radioactive Waste Nong Son Uranium Ore Processing "

Liquid waste from Nong Son uranium ore processing is treated with concentrated acid, agglomerated, leached, run through ion exchange and then treated with H2O2 to precipitate yellowcake. The liquid radioactive waste has a pH of and a high content of radioactive elements, such as: [U] = ppm and [Th] = ppm. In addition, this waste contains many polluted chemical elements with high content, such as arsenic, mercury, aluminum, iron, zinc, magnesium, manganese and nickel. The application of the triditional method as one stage. | VNU Journal of Science Earth Sciences 27 2011 39-46 Study of the Treatment of the Liquid Radioactive Waste Nong Son Uranium Ore Processing Nguyen Ba Tien1 Tran Van Quy2 1Institut for Technology of Radioactive and Rare Elements VAEC - 48 Lang Ha Ha Noi Faculty of Environmental Sciences Hanoi University of Science VNU 334 Nguyen Trai Hanoi Vietnam Received 3 December 2010 received in revised form 17 December 2010 Abstract. Liquid waste from Nong Son uranium ore processing is treated with concentrated acid agglomerated leached run through ion exchange and then treated with H2O2 to precipitate yellowcake. The liquid radioactive waste has a pH of and a high content of radioactive elements such as U ppm and Th ppm. In addition this waste contains many polluted chemical elements with high content such as arsenic mercury aluminum iron zinc magnesium manganese and nickel. The application of the triditional method as one stage precipitation or precipitation in coordination with BaCl2 is not effective. These methods generated a large amount of sludge with poor settling characteristics. The volume of final treated waste was large. This paper introduces the investigation of the treatment of this liquid radioactive waste by the method of two stage of precipitation in association with polyaluminicloride PAC and polymer. The impact of factors pH neutralizing agents quantity of PAC and polymer to effect precipitation and improve the settling characteristics during processing was studied. The results showed that the processing of liquid radioactive waste treatment through two stages first stage at pH 3 and the second stage at pH with limited PAC and polymer A 101 resulted in significant reduced volume of the treated waste. The discharged liquid satisfied the requirement of the National Technical Regulation on Industrial Waste Water QCVN 24 2009 . Keywords uranium processing liquid radioactive waste treatment. 1. Introduction The radioactive liquid waste from .

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