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有关钛酸吸附剂提取海水中铀的研究,已进行得很多,但从固-液界面化学行为的角度去研究吸附机理,则报道极少.本文用微电泳法研究了钛酸吸附剂在吸铀前后的电动电位变化及计算了铀在不同pH溶液中的溶存状态分布.根据实验事实及双电层理论分析,推断钛酸吸附剂吸铀,属于特性吸附,其特性吸附自由能为△G_s=-8～-9千卡/摩尔.钛酸吸附剂主要与水溶液中含铀酰的带正电荷质点起化学作用形成表面络合物,使表面电位升高.
There are many studies on the extraction of uranium from seawater with titanic acid sorbent, but there are few reports about the adsorption mechanism from the perspective of the chemical behavior of solid-liquid interface.In this paper, Uranium electromotive potential before and after uranium and uranium calculated in different pH solution in the dissolution state distribution.According to the experimental facts and electric double layer theoretical analysis, concluded that the titanic acid adsorbent uranium absorption, belonging to the characteristic adsorption, the characteristic adsorption free energy △ G_s = -8 ~ -9 kcal / mol Titanic acid sorbent mainly with aqueous solution of uranyl containing positively charged particles play a chemical role in the formation of surface complexes, the surface potential increased.