中文摘要：

研究了胶原纤维固化杨梅单宁（IBT）这一新型吸附材料对Mo^6＋的吸附特性。实验表明，温度对吸附容量影响不大，而pH值对吸附容量有显著影响，Mo^6＋的吸附容量随pH值降低而增加，表明其吸附机理是吸附剂与聚钼阴离子之间的静电结合。当Mo^6＋的初始质量浓度为100．0mg/L、吸附剂用量0．100g、温度为303K、pH值2．0时，IBT对Mo^6＋的吸附量为82．4mg／g。Freundlich方程可以很好地描述IBT对Mo^6＋的吸附等温线。动力学研究表明，初始吸附速率很快，吸附达到平衡的时间约为600min,其吸附动力学可很好地用拟二级速率方程描述，计算所得的平衡吸附量与实测值误差很小。解吸实验表明，0．02mol／LEDTA溶液能使吸附剂再生，并能循环使用。选择性吸附研究表明，在酸性（pH值2．0）条件下，IBT对Mo^6＋的吸附率大于95％，而对M^6＋和Cu^2＋的吸附率低于5％．可用于Mo^6＋-Ni^2＋和Mo^6＋-Cu^2＋二元混合溶液中Mo^6＋的分离和提取．

英文摘要：

The adsorption behaviors of Mo^6＋ on collagen fiber immobilized bayberry tannin（ IBT）, a new kind of adsorbent, were investigated. It was found that the influence of temperature on adsorption capacity of Mo^6＋ is insignificant, but the effect of pH value on the adsorption was remarkable. The adsorption capacity of Mo^6＋ was increased with the decrease of pH value. These facts implies that adsorption is based on electrostatic association between adsorbent and polymeric anions of Mo^6＋. At pH value 2.0 and 303 K, the adsorption capacity of Mo^6＋ on 0. 100 g adsorbent was 82.4 mg/g in 100 mL of 100.0 mg/L Mo^6＋ solution. The adsorption isotherms can be well described by Freundlich equation. The adsorption rate of the adsorbent to Mo^6＋ was very fast at the beginning, and reached adsorption equilibrium around 600 min. The adsorption kinetics can be well described by the pseudo- second-order-rate model and the adsorption capacities calculated by this model are very close to those experimentally determined. The adsorbent can be regenerated by using 0.02 mol/L sodium ethylenediamine-tetraacetate （ EDTA-Na4 ） as resorption agent after adsorption of Mo^6＋. The adsorbent also showed satisfactory adsorption selectivity to Mo^6＋ in Mo^6＋-Ni^2＋ and Mo^6＋-Cu^2＋ mixture solutions at pH value 2.0, because these metal ions have different adsorption mechanisms on IBT and therefore, to be adsorbed at different pH value ranges.