磁性离子交换树脂吸附-强化混凝去除消毒副产物前驱物的机理研究

Disinfection byproducts control technology is one of the research focuses in water treatment area. Magnetic ion exchange (MIEX) resin absorption is combined with enhanced coagulation to treatment micro-polluted surface water, for its excellent anion adsorption capacity. The combined processes are designed to improve the removal efficiency of disinfection byproducts precursors (organic matter and bromide ions). The operation parameters are determined by investigating the influences of various factors on the removal effect of organic matter. The characteristics of organic pollutants, the surface electrical properties of colloidal particles, and the morphology and composition of aggregates are examined to clarify the interaction among MIEX resin, organic matter and coagulant. The treatment effect and mechanism of the combined process in organic matter-bromide ions coexistence system are investigated. The role of MIEX resin in floc formation and improving floc properties is clarified by the investigation of coagulation dynamic and floc properties. On the basis of the above study, the enhanced coagulation theory under the MIEX resin pre-adsorption conditions will be completed, which could provide theoretical support for the application of the combined process in water treatment plants.

消毒副产物控制技术是目前水处理领域的研究热点之一。本课题利用磁性离子交换（MIEX）树脂良好的阴离子吸附能力，与强化混凝工艺联合处理微污染地表水，以提高消毒副产物前驱物（有机物和溴离子）的去除效率。本课题通过考察多种影响因素对有机物去除效果的影响，确定组合工艺的运行参数；通过考察有机污染物的特性、胶体颗粒表面电性以及凝聚体的形貌和组成，阐明MIEX树脂、有机物和混凝剂之间的相互作用；研究组合工艺对有机物-溴离子共存体系的处理效果和作用机理；研究混凝动力学和絮体特性，揭示MIEX树脂在絮体形成和改善絮体特性方面的作用。在上述研究的基础上，完善MIEX树脂预吸附条件下的强化混凝理论，为组合工艺在水厂的实际应用提供理论支撑。

消毒副产物控制技术是目前水处理领域的研究热点之一。本课题利用磁性离子交换树脂（MIEX）良好的阴离子吸附能力，与强化混凝工艺联合处理微污染地表水，以提高消毒副产物前驱物的去除效率。本课题优选出了具有较高有机物去除效果的混凝剂并与MIEX树脂联用，考察了多种影响因素对有机物去除效果的影响，明确了组合工艺的运行参数。通过考察有机污染物的特性、胶体颗粒表面电性以及凝聚体的形貌和组成，阐明MIEX树脂、有机物和混凝剂之间的相互作用。研究了组合工艺对有机物与阴离子共存体系的处理效果和作用机理。研究了混凝动力学和絮体特性，揭示了MIEX树脂在絮体形成和改善絮体特性方面的作用。在上述研究的基础上，完善MIEX 树脂预吸附条件下的强化混凝理论，为组合工艺在水厂的实际应用提供理论支撑。