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Application of 5-Br-PADAP Colorimetric Method in the Determination of Low Content Uranium in High Iron and High Nitrate Solutions
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Xinran CAO1, Chen CHENG2, Libin ZHOU1
Uranium Mining and Metallurgy | 2025, 44(1) : 71 - 77
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Uranium Mining and Metallurgy | 2025, 44(1): 71-77
• MINING AND HYDROMETALLURGY •
Application of 5-Br-PADAP Colorimetric Method in the Determination of Low Content Uranium in High Iron and High Nitrate Solutions
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Xinran CAO1, Chen CHENG2, Libin ZHOU1
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  • 1 Beijing Research Institute of Chemical Engineering and Metallurgy, CNNC, Beijing 101149, China
  • 2 Agriculture and Rural Bureau of Anguo, Baoding 071200, China
Published: 2025-02-20 doi: 10.13426/j.cnki.yky.2024.05.04
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This article studies the pretreatment methods of solutions with high iron content, high nitrate content, and low uranium content. The results show that under the pretreatment conditions of using 4% TOPO cyclohexane solution as the extractant, a volume ratio of organic phase to water phase of 1:6, an extraction time of 2 minutes, an extraction temperature of 25℃, and a mixed complexing agent as the counter extractant, the extraction efficiency reached 99.0%, and the counter extraction efficiency was 99.0%. The 5-Br-PADAP colorimetric method can accurately determine the uranium content in the pretreated solution after extraction reverse extraction of high iron, high nitrate, and low uranium content solutions. The relative standard deviation of this method is less than 8.11%, the recovery rate of spiking is 96.0%~99.5%, and the detection limit of this method is 0.013 mg/L.

high iron  /  high nitrate content  /  low uranium content  /  pretreatment  /  extraction  /  reverse extraction  /  5-Br-PADAP
Xinran CAO, Chen CHENG, Libin ZHOU. Application of 5-Br-PADAP Colorimetric Method in the Determination of Low Content Uranium in High Iron and High Nitrate Solutions[J]. Uranium Mining and Metallurgy, 2025 , 44 (1) : 71 -77 . DOI: 10.13426/j.cnki.yky.2024.05.04
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doi: 10.13426/j.cnki.yky.2024.05.04
  • Receive Date：2024-05-24
  • Online Date：2025-07-04
  • Published：2025-02-20
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  • Received：2024-05-24
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    1 Beijing Research Institute of Chemical Engineering and Metallurgy, CNNC, Beijing 101149, China
    2 Agriculture and Rural Bureau of Anguo, Baoding 071200, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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