中文摘要：

通过吸附历时过程、饱和吸附量、吸附过程中Na^＋离子交换释放量、絮凝过程中蒙脱土胶体颗粒的Zeta电位测试等试验，考察了FeCl3和聚合氯化铁（PFC）两种不同Fe（Ⅲ）形态的絮凝剂对蒙脱土悬浮水样的吸附电中和特征，并探讨了其作用机理。结果表明，随着碱化度（B）的增大，PFC吸附的趋势增强，吸附平衡时PFC（B=0．7）的饱和吸附量高达6．5×10^-5，mol／L，高出FeCl3的30％以上。除浊试验表明，PFC的投加量范围较FeCl3明显增大，说明高分子絮凝剂中的水解多核多羟基络合物在溶液中比较稳定。PFC和FeCl3对钠化蒙脱土的吸附方式不同，FeCl3以离子交换为主；PFC的吸附既有离子交换又存在表面络合作用，吸附能力较FeCl3强；PFC比FeCl3具有更强的吸附电中和能力。

英文摘要：

The adsorption and charge neutralization characteristics of two Fe-based flocculants, FeCl3 and polyferric chloride （PFC）, in montmorillonite suspension system were studied by investigating the time required to reach equilibrium, saturated extent of adsorption, Na^＋ exchange capacity, and the Zeta potential of montmorillonite particles. The interaction mechanisms between Fe-based flocculant and montmorillonite particles were also discussed. The experimental results show that the adsorption ability of PFC is enhanced with its B value increasing. The maximum saturated extent of adsorption of PFC （B = 0.7 ） is 6.5 × 10^-5 mol/L under a adsorption equilibrium state, which is 30% higher than that of FeCl3. The turbidity removal experimental results show that the dosage of PFC is obviously wider than that of FeCl3, which indicates that the multi-nucleus hydroxy complex of polymeric flocculant is quite stable in the solution. PFC and FeCl3 have a different adsorption mechanism to Na-montmorillonite. The adsorption mechanism involves mostly ion exchange for FeCl3, but also surface complexation for PFC. PFC has higher adsorption and charge neutralization ability than FeCl3.