Fishing for Isotopes: Capturing Beryllium-7 from Brookhaven LINAC Isotope Producer’s 300 gallons of Cooling Water,ACS Omega

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Fishing for Isotopes: Capturing Beryllium-7 from Brookhaven LINAC Isotope Producer’s 300 gallons of Cooling Water
ACS Omega ( IF 3.7 ) Pub Date : 2018-03-16 00:00:00 , DOI: 10.1021/acsomega.7b01757
Jonathan Fitzsimmons ₁ , Lisa Muench ₁ , Cathy S. Cutler ₁

Affiliation

The ability of capturing metals and/or radionuclides from large amounts of water is important for radioisotope waste treatment and environmental cleanup. We have developed an approach that rapidly optimizes the capturing of radioisotopes in large-volume aqueous environments. The approach was scaled up to capture beryllium-7 from 300 gallons of cooling water associated with a linear accelerator. Solid supports with the functional groups sulfonic acid, iminodiacetate, pyridine amine, pyridine amine acid, or quaternary amine were incubated in the cooling water for 1 week. One sulfonic acid solid support was able to capture 2.1 mCi of Be-7. Subsequent studies with the sulfonic acid solid support focused on the uptake over time of Be-7, scale-up of capturing Be-7, and subsequent purification of Be-7. The uptake over time of Be-7 was found to be linear in the first 24 h, with an equation of Y = 4.11X (% uptake/time (h)) (R² = 0.998). The uptake of Be-7 reached the maximum at 24 h and was identical to the uptake at 168 h. To purify Be-7, the optimal purification approach was to release the Be-7 from the solid support with 10 M HCl, which could be immediately passed through an AG1 resin to remove radioimpurities. The radiopurity of the purified Be-7 was greater than 99%, and this method was used to purify 65 mCi of the isotope.

中文翻译：

捕捞同位素：从Brookhaven LINAC同位素生产商的300加仑冷却水中捕获铍7

从大量水中捕获金属和/或放射性核素的能力对于放射性同位素废物的处理和环境清洁非常重要。我们已经开发出一种方法，可以快速优化在大量水环境中放射性同位素的捕获。该方法已扩大规模，可从与线性加速器相关的300加仑冷却水中捕获铍7。将具有官能团的磺酸，亚氨基二乙酸酯，吡啶胺，吡啶胺酸或季胺的固体载体在冷却水中孵育1周。一种磺酸固体支持物能够捕获2.1 mCi的Be-7。随后用磺酸固体支持物进行的研究集中于随着时间的推移吸收Be-7，扩大Be-7的捕集率以及随后纯化Be-7。ÿ = 4.11 X（％摄取/时间（h））（- [R ² = 0.998）。Be-7的吸收在24 h达到最大值，与168 h的吸收相同。为了纯化Be-7，最佳的纯化方法是用10 M HCl从固体支持物中释放Be-7，该溶液可立即通过AG1树脂以去除放射性杂质。纯化的Be-7的放射纯度大于99％，该方法用于纯化65 mCi的同位素。

更新日期：2018-03-16

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