激光散射研究絮凝剂在水中的自然构象

Study on the molecular weight,the size and shape of flocculation in pure water by laser light scattering

用激光散射技术测量了无机高分子絮凝剂PAC ,PAC V在水中自然状态下的分子量、其颗粒的流体力学半径、回转半径、第 2维里系数等参数 ,并根据流体力学半径和回转半径的比值导出絮凝剂的颗粒形态。从而较全面地了解絮凝剂在水中的自然构象 ,并证实了絮凝剂的分子量、其颗粒大小及形状不随浓度的改变而变化 ,但对絮凝效果有较大影响 ,这为确切探知絮凝机理提供实验数据和理论依据。

The weight average molecular weight,the hydrodynamic radius and gyration radius,the size distribution and the shape of the particles of flocculation PAC and PAC-V in pure water are studied with laser scattering technique.Accompanied with removal efficacy measurements,the study proves that the molecular weight,the size and shape of flocculation strongly affect the removal efficacy,and do not change with the concentration of flocculation,thus provides experimental evidence and theoretical basis for flocculating mechanism.