铝原位水解产物和腐殖酸质子化基团的优先结合特性及再生水控制策略研究

The project is intended to increase the removal of natural organic matter represented by humic acid. A series of representative HA model compounds were selected, and the preferential binding properties of the protonated groups of humic acid with various hydrolyzed aluminum species under different chemical conditions were investigated. Furthermore, the interaction and matching relationship between the removal of the protonated group and coagulant speciation can be clarified. Based on fractionating the effluent dissolved organic matter (EfOM), the coagulation behavior of in situ hydrolyzed aluminum species with different components of organic matter can be obtained. Using advanced chemical analytical methods, the reactivity of organic matter with the aluminum ion can be quantified. According to the molecular structural variation of organic matter during coagulation, the roles of hydrolyzed species and organic matter, mechanism of synergistic effects of various in situ hydrolyzed aluminum species for the removal of organic matter selectively can be achieved. The results provide theoretical and application basis for advanced coagulation treatment process and improvement of humic acid removal based on established fractionation and evaluation system of EfOM. Thus, high efficiency of sewage recycling and water quality safety guarantee have realized.

以高效去除水中以腐殖酸为代表的天然有机物为目的，选择有代表性的特征官能团腐殖酸片段，探索腐殖酸质子化基团和铝离子不同水解产物在不同化学条件下的优先结合特性，明确腐殖酸质子化基团去除和混凝剂形态之间的相互作用和匹配关系；通过对二级处理水中有机物进行深度分级，探索铝盐原位水解物种对有机物不同组分的凝聚行为；结合现代化学分析技术，探讨各条件下有机物与铝离子结合的反应活性；基于对混凝过程中有机物的构造改变特征的分析、不同水解物种混凝去除的有机物种类的确定，揭示铝盐原位水解产物选择去除有机物的协同作用机制，以此为基础，建立二级处理水中有机物深度分级表征评估体系，优化不同回用水条件下的混凝处理工艺，强化水中有机物的去除效率，从而实现污水再生利用的高效与水质安全保障。

饮用水源水中存在的天然有机物因产生消毒副产物（DBPs）所引起的水质问题备受关注。对此，以有机物的高效去除为目标，选择有代表性的特征官能团腐殖酸片段，从分子角度探究了不同结构特征有机物的混凝效果，明确了腐殖酸质子化基团和铝离子不同水解产物在不同化学条件下的优先结合特性。通过对二级处理水中有机物进行深度分级，探索了铝盐原位水解物种对有机物不同组分的凝聚行为和各条件下有机物与铝离子结合的反应活性；基于对混凝过程中有机物的构造改变特征的分析、不同水解物种混凝去除的有机物种类和消毒副产物前驱物的确定，揭示了铝盐原位水解产物选择去除有机物的协同作用机制，以此为基础，建立有针对性的有机物强化混凝匹配机制，为再生水利用工艺的优化和污染物的合理控制提供可靠依据。