中文摘要：

研究了溶液中牛血清白蛋白（BSA）的存在对Cu^2＋与δ-MnO2间吸附平衡性质的影响，旨在增进人们对Cu^2＋环境化学行为的认识。结果表明：BSA存在下，Cu^2＋在δ-MnO2表面的吸附率-pH曲线呈典型的“S”形，加入BSA使Cu^2＋的吸附突跃向高pH方向移动，影响程度与BSA的加入方式有关，其次序为Ⅳ（先加BSA后加Cu^2＋）〉Ⅲ（Cu^2＋和BSA同时加）≈Ⅱ（（先加Cu^2＋后加BSA）；BSA存在下，Cu^2＋的等温吸附线遵循Langmuir等温吸附方程，Cu^2＋的饱和吸附量随BSA浓度的增大而减小，并随BSA的加入方式而改变，其次序为I（不加BSA）〉Ⅱ≈Ⅲ〉Ⅳ；Cu^2＋在δ-MnO2上的饱和吸附量随温度的升高而增大。在pH=3．0条件下，Cu^2＋在δ-MnO2上的吸附是完全可逆的，但pH=5．0的条件下，吸附是不可逆的，BSA对Cu^2＋的吸附可逆性没有影响。

英文摘要：

This paper studied the adsorption equilibrium between Cu^2＋ and δ-MnO2 in solution in the presence of bovine serum albumin （BSA） to be beneficial to understand the environmental chemical behavior of Cu^2＋. The results showed that in the presence of BSA, the change pattern of Cu^2＋ adsorption onto δ-MnO2 with pH was a typical S-shape curve. BSA made the adsorption leap of Cu^2＋ moved to high pH range, and the degree was related to the adding order of BSA, i.e., Ⅳ （BSA added first） 〉 Ⅲ （Cu^2＋ and BSA added simultaneously） ≈ Ⅱ （Cu^2＋ added first）. The Cu^2 ＋ adsorption in the presence of BSA was fitted Langmuir adsorption isotherm, and the saturated Cu^2＋ adsorption quantity decreased with increasing BSA concentration and changed with the adding order of BSA, i.e. , Ⅰ （without BSA） 〉 Ⅱ≈Ⅲ〉 Ⅳ. In addition, the maximum capacity of Cu^2＋ onto δ-MnO2 increased with increasing temperature. The adsorption of Cu^2＋ onto δ-MnO2 was reversible at pH 3.0 but irreversible at pH 5.0. BSA had no influence on the reversibility of Cu^2 ＋ adsorption onto δ-MnO2.