颗粒物附着有机物的分布及其典型官能团的转化

通过超声提取(Ultrasonic extraction, UE)及气相色谱-质谱联用法分析(Gas chromatography-Mass spectrometer, GC-MS)对饮用水活性炭工艺出水中的颗粒物进行有机成分组成分析，考察颗粒物附着有机物的种类、特征、来源、转化机制及分布规律。结果表明，活性炭出水中颗粒物上的附着的弱极性有机物以烃类(37.75%)、酸酯类及酮类(32.60%)为主，并随粒径不同而略有差别。活性炭对有机物的去除受有机物的特性和其自身的性质影响；活性炭对各分子量范围内有机物的生物降解作用主要包括直接氧化分解、胞外酶对有机物的分解作用、生物吸附絮凝作用。因此有必要从附着态有机物角度控制活性炭出水中颗粒物的数量，以减少三卤甲烷(THMs)生成，提高活性炭出水的化学安全性。

Distribution and typical transformation of organic functional groups attaching to particles

UE extraction and GC-MS determination are used to analyze organic ingredients adhesion to particles in GAC effluents, and examine the types, characteristics, sources, transformation mechanisms and distribution of organic matter attached to particles. The results indicate that the weak polar organic adhesion to particles in GAC effluents mainly included the hydrocarbons(37.75%), esters and ketone (32.60%). There is a slightly different amount of organic matter attached to particles with different sizes. The transfer and transformation of organic matter attached to particles present the changes of number and type of functional group, and molecular structure determined the migration and transformation behavior of physical and chemical properties of organisms in the environment, and the internal eco-toxicological effects. And on this basis, it is necessary to control the number of effluent particles to reduce THMs and improve chemical security.