聚合氯化铝与传统混凝剂的凝聚—絮凝行为差异

本文综合阐述无机高分子絮凝剂与传统混凝剂在化学特征和凝聚－絮凝行为机理上的差异。ＰＡＣ的主要成分聚十三铝在预制条件下能大量生成。它们对水解反应有一定的稳定性，直接吸附有颗粒物表面，发挥强烈的电中和及粘结架桥作用，其流动电流，ζ电位，絮凝指数及凝聚－絮凝区域图等，均与传统混凝剂有很大不同，其计算模式应根据表面络合及表面沉淀原理建立。

THE DIFFERENCES OF COAGULATING BEHAVIOR AND MECHANISM BETWEEN PREPRODUCED INORGANIC POLYMERIC AND TRADITIONAL COAGULANTS

The outstanding behaviors of inorganic polymer flocculants polyaluminum superior to the traditional aluminum salt coagulants were experimentally examined by the poten-tiometry ,27 Al NMR, timed ferron complexation spectrophotometry, laser scattering PCS, streaming current detector, zeta potential meter and flocculation detector and jar test. A113 species can be made up only when the Al solution is undertaken a base addition with the production of Al (OH)4- as precursors. Their superior properties in the coagula-tion-flocculation processes should be attributed also to the character of temporary refractory to hydrolysis. A scheme of transformation pathway for Al species in solution was suggested. Their mechanism and quantitative model in coagulation-flocculation processes may be proposed to set up the surface complexation-precipitation modeling.