中文摘要：

采用Cu^2＋选择电极研究了不同pH值条件下胡敏酸（HA）、无定形Fe2O3、HA—Fe2O3复合胶体对Cu^2＋的等温吸附规律．结果表明，随着pH值的升高，3种胶体饱和吸附量和吸附平衡常数均增大，有利于吸附的进行．HA和无定形Fe2O3等温吸附Cu^2＋的4种拟合方程中，Langmuir方程整体拟合效果最佳，其次为对数方程和Frcundllch 方程 Linear方程较差．HA—Fe2O3复合胶体等温吸附Cu^2＋的4种拟合方程均达到显著相关．在相同pH值条件下，无定形Fe2O3对Cu^2＋吸附量最小，复合胶体次之，HA胶体最大；而且，无定形Fe2O3和复合胶体的饱和吸附量之和小于HA胶体．

英文摘要：

The isothermal adsorption characteristics ofhumic acid colloid （HA）, amorphous Fe2O3 colloid, and HA-F2O3 complex colloid to Cu^2＋at different acidities were studied by using Cu^2＋ selective electrode. The maximum adsorption amounts （Smax and adsorption equilibrium constants （k） of three colloid were all increased with pH value increasing, and thus high pH was beneficial to the adsorption process. The adsorption behaviors of HA and amorphous Fe2O3 colloid to Cu^2＋ could be well described by Langmuir equation, and then logarithm equation, Freundlich equation, and linear equation, while the adsorption behaviors of HA-Fe2O3 complex colloid to Cu^2＋ could be well described by the four isothermal adsorption equations. At the same pH, the order of the adsorption amount obtained by the three colloids was amorphous Fe2O3〈 the complex colloid 〈 HA. Moreover, the sum of the maximum adsorption amounts obtained by amorphous Fe2O3 and the complex colloid was lower than that of HA.