利用偏振光散射技术的藻类絮凝过程监测

在水体中添加适量絮凝剂和助凝剂将藻类絮凝沉降是藻华治理的常用方法。水体现场环境复杂,影响絮凝效果因素较多, 能原位监测藻类絮凝过程有利于提高治理效果。以铜绿微囊藻为样本,添加不同浓度的聚合氯化铝和高岭土形成絮凝体 悬浮液,并利用偏振光散射技术观察不同絮凝体悬浮液的偏振参数。研究结果表明,偏振参数可表征随着絮凝剂和助凝剂 用量变化而引起的不同絮凝过程,显示偏振光散射技术描述藻类絮凝过程的潜力。该方法为藻类絮凝过程研究、藻华治 理监测、污染水处理、药剂开发等提供了一种非接触、无标记、快速的原位监测手段。

Monitoring of Algal Flocculation Using Polarized Light Scattering

Adding proper amount of flocculants and coagulants into water can settle algal flocculation and remove algal bloom. Water body in scene is much complex and there are many factors affecting the flocculation effects. It is beneficial to improve the treatment effect to monitor the algae flocculation process in situ. Microcysts aeruginosawas used as a sample in this work to form flocculant suspension by adding different concentrations of polyaluminium chloride and kaolin, and then the polarization parameters of the different flocs suspension were measured by polarized light scattering technique. The results show that the polarization parameters can be used to characterize the flocculation processes affected by the dosage of flocculants and coagulants, which shows the potential of the proposed polarized light scattering technique to describe the algal flocculation process. It is indicated that the method provides an in-situnon-contact, unmarked and rapid monitoring tool for algal flocculation process research, algal blooms governance and monitoring, contaminated water treatment, pharmaceutical development, etc.