中文摘要：

以天然牛皮为原料，经胃蛋白酶处理制得水解胶原；通过胶原-黑荆树单宁-醛反应制备了胶原-单宁树脂（C-TR）吸附材料，并表征了材料的形貌，测定了材料的比表面积、热变形温度等性质。系统研究了C-TR对水溶液中UO2^2＋的吸附特性。结果表明，C-TR对UO2^2＋有较强的吸附能力。当温度为303K、pH：5.0、UO2^2＋的初始浓度2.5mmol·L^-1时，吸附容量达到1.49mmolU/g。升高温度，平衡吸附量增大。pH对吸附容量的影响较大，适宜的pH范围为5.0-6.0。C-TR对UO2^2＋的吸附平衡符合FreundliCh方程。吸附动力学可用拟二级速度方程来描述。C-TR对UO2^2＋的吸附基本不受NaCl影响，该吸附材料可望用于海水中铀的富集和分离。

英文摘要：

Collagen was obtained by enzymatic hydrolysis of bovine hide using pepsin, and then the collagen - tannin resin （ C - TR） was prepared via the reaction of collagen with black wattle tannin and aldehyde. The morphology, specific area and deconstruction temperature of C - TR were determined respectively. The adsorption of C - TR to UO2^2＋ in aqueous solution was investigated. It was found that C - TR has high adsorption capacity to UO2^2＋. The adsorption capacity was 1.49retool U/g at 303K and pH 5.0 when the initial concentration of UO2^2＋ was 2.5mmol·L^-1. The adsorption capacity was increased with the increase of temperature, and the adsorption isotherms can be described by the Freundlich equation. The pH had a significant effect on the adsorption of C - TR to UO2^2＋ and a maximal adsorption capacity was achieved in the pH range of 5.0 - 6.0. The adsorption kinetics data were well fitted by the pseudo - second - order rate model. The adsorption capacity of C - TR to UO2^2＋ was little influenced by NaCl, which suggests that the separation of UO2^2＋ from sea water can be expected by using C - TR as an adsorbent.