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陆地上铀蕴藏量逐年减少,认为在不久将来将会全部用尽,可是,在海洋中一吨海水就含铀3.4毫克,所以,各国都在致力于海水提铀的研究。最近,日本京都大学原子能反应堆试验所古屋仲芳男副教授用方铅矿试验成功。方铅矿对铀的吸着力很强,古屋仲副教授制作了50张边长为10厘米的正方形,带有小孔的正方形金属网 (60目)。在其上面用接合剂粘上粒状的方铅矿,每10张为一组。把三组放在和歌山海面距岸2公里、流速比较大的海水中,另外两组沉在离泉佐野0.5公里的海水中,放置140个小时。结果,和歌山岛海水的“方铅板”一张提铀520微克,泉佐野海水中的“方
Terrestrial uranium reserves decreased year by year, that in the near future will be fully depleted, but in the ocean a ton of seawater containing uranium 3.4 mg, so all countries are committed to the sea to mention the study of uranium. Recently, Associate Professor Furuya Nakayama of the Atomic Energy Reactor Experimental Station at Kyoto University in Japan successfully tested galena. Galena has a strong attraction for uranium, and Associate Professor Nagasaka made 50 square squares with sides of 10 cm and a square mesh with holes (60 mesh). On top of it, the granular galena is glued with a cement, one for every 10 sheets. The three groups were placed in the Wakayama Sea 2 km away from the shore, the relatively large flow rate of the sea, the other two groups sink in the water 0.5 km from Izumi Sano, placed 140 hours. As a result, a piece of “square grid” of Waksandao seawater was raised to 520 micrograms of uranium,