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用强碱性阴离子交换树脂从含铀的硫酸溶液中提取铀早已在工业上得到广泛的应用。但是有关该树脂吸着铀的机理,长期以来一直存在两种观点,即“交换机理”和“加成机理”。季铵型的阴离子交换树脂(R_4N~+X~-)在水中可以完全电离(表现出强碱性),含铀的硫酸溶液中存在着硫酸铀酰阴离子络合物(UO_2(SO_4)_n~(2-2n),n=2,3),因此大多数人都认为强碱性阴离子交换树脂从硫酸溶液中吸着铀是单纯的离子交换反应(即
The extraction of uranium from uranium-bearing sulfuric acid solutions using strongly basic anion exchange resins has long been widely used industrially. However, there are two kinds of views that have long been held about the mechanism by which this resin adsorbs uranium: the “exchange mechanism” and the “addition mechanism.” Quaternary ammonium anion exchange resin (R_4N ~ + X ~ -) can be completely ionized in water (showing strong alkalinity), Uranium sulfate solution containing uranyl sulfate anion complex (UO_2 (SO_4) _n ~ (2-2n), n = 2,3), so most people think that strongly basic anion exchange resins sorbed uranium from sulfuric acid solution is a simple ion exchange reaction (ie