藻类所产溶解性胞外有机物（dEOM）逐渐成为广泛关注的环境污染问题，其对饮用水安全和人类健康构成不容忽视的威胁。通过对混凝法进行研究，希望对水体中dEOM的污染问题有较好的解决。本项目从不同藻类的不同生长周期提取、纯化dEOM，明确dEOM普遍具有的组成、结构特征。以此为基础，从原理上对新型絮凝剂的核心分子结构进行设计，进而依据模板聚合、原子转移自由基聚合原理，有目的性的制备具有特殊活性基团和结构的、对dEOM有较好去除效果的絮凝剂。并通过分析絮凝剂实际组成、结构，揭示絮凝剂的制备机理。在混凝去除水体中dEOM的研究中，考察dEOM的混凝去除效率，优化混凝条件，分析絮体组成、特性，探究dEOM与絮凝剂的相互作用机制和相关混凝去除机理，并明确自然含藻水体中其它污染物与dEOM的作用过程及对其去除效率的影响。本项目为实际水体中dEOM的混凝去除奠定理论基础和提供科学依据。

Dissolved extracellular organic matter (dEOM) originated from algae-polluted water has been paid increasing attention for protecting the environment. It poses the potential threat to the safety of drinking water and human health. Coagulation as widely applied water treatment technology is supposed to solve this problem. The study is firstly to collect dEOM from the varied algae in the different culture time and to analyze the characteristic of purified dEOM for determining the special composition and structure. Based on the characteristic of dEOM, the molecular structure of novel flocculants is designed in principle. And flocculants containing the special active group and structure is prepared according to the principles of template polymerization and atom transfer radical polymerization. Then, preparation mechanism is discovered via the structural analysis of flocculants. Besides, the performance of flocculants in the dEOM treatment from the algae-polluted water is investigated, and acceptable removal efficiency of dEOM is found. And the flocs characteristics, interaction between dEOM and flocculants and coagulation mechanism are discussed in the treatment. Moreover, it is interesting to analyze the interaction between dEOM and other pollutants in the natural algae-polluted water and the effects of other pollutants on the dEOM removal. In conclusion, this study is of great theoretical significance to the preparation of flocculants and has important guiding value to the dEOM treatment by coagulation.