우라늄 함유 폐수의 침전 처리에 대한 열역학적 기초 연구 (Basic Thermodynamic Study of Precipitation Treatment of Uranium Wastewater)

서지정보

· 발행기관 : 한국수처리학회
· 수록지 정보 : 한국수처리학회지 / 30권 / 4호 / 73 ~ 79페이지
· 저자명 : 송혜원, 김동수

초록

Uranium is one of the most frequently used radioactive element but is also known for its toxicity towards variety of species. To study the thermodynamic features and to identify the optimal condition of the precipitation treatment of wastewater that contains uranium, Pourbaix diagram was constructed based on the temperature of 288K, 298K, 308K, and 318K. Between the temperature of 288K to 318K, uranium can exist in the form of U4+, UO22+, U3O8, UO3, and UO2 in wastewater. Among these five compounds, UO2 was the most dominant compound, followed by UO22+, U3O8, UO3, and U4+. Also, UO22+ and U4+ existed as ion, while UO3, UO2, and U3O8 existed as precipitates. At the temperature of 288K, 298K, 308K, and 318K, UO2 started the precipitation reaction from pH 0.9435, 0.9451, 0.9467, and 0.9481, while U3O8 and UO3 started the precipitation reaction at pH 5.2727, 5.2712, 4.9277, and 4.7716, while UO3 was from 7.3587, 7.3610, 7.1942, 6.8121 respectively. Between pH 0 to pH 14, the ratio of compound to ion was approximately 2 to 1, and the ratio increased as the temperature increased.

영어초록

Uranium is one of the most frequently used radioactive element but is also known for its toxicity towards variety of species. To study the thermodynamic features and to identify the optimal condition of the precipitation treatment of wastewater that contains uranium, Pourbaix diagram was constructed based on the temperature of 288K, 298K, 308K, and 318K. Between the temperature of 288K to 318K, uranium can exist in the form of U4+, UO22+, U3O8, UO3, and UO2 in wastewater. Among these five compounds, UO2 was the most dominant compound, followed by UO22+, U3O8, UO3, and U4+. Also, UO22+ and U4+ existed as ion, while UO3, UO2, and U3O8 existed as precipitates. At the temperature of 288K, 298K, 308K, and 318K, UO2 started the precipitation reaction from pH 0.9435, 0.9451, 0.9467, and 0.9481, while U3O8 and UO3 started the precipitation reaction at pH 5.2727, 5.2712, 4.9277, and 4.7716, while UO3 was from 7.3587, 7.3610, 7.1942, 6.8121 respectively. Between pH 0 to pH 14, the ratio of compound to ion was approximately 2 to 1, and the ratio increased as the temperature increased.

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