基于硫醚类嗅味物质和天然有机物同步去除的预氧化/强化常规工艺构建及其协同作用机制研究

Frequent occurrences of odor compounds in source water lead to a complex pollution system formed by odor compounds and natural organic matter (NOM), which also challenges the drinking water safety and treatment technology. This project is devoted to solve the complex pollution problem caused by thioether odor compounds-NOM; focused on the complex mechanism, oxidation mechanism, synergistic removal mechanism by oxidation-enhanced coagulation of thioether odor compounds-NOM complex pollution system; engaged to break the limitations of the traditional water treatment process on simultaneous removal of thioether odor compounds and NOM; aimed to develop a pre-oxidation/enhanced coagulation water treatment process which could synergistically remove the thioether odor compounds and NOM. This project would provide theoretical basis and scientific support for water industry to improve the drinking water treatment technology.

饮用水水源嗅味污染问题频发，嗅味物质与天然有机物（NOM）形成的复合污染给水质安全保障提出了巨大挑战。本项目针对水体中常见的硫醚类嗅味物质-NOM复合污染体系，围绕其在常规工艺中同步去除的难题，深入研究硫醚类嗅味物质及不同类型NOM的复合污染机制、氧化去除机制、预氧化-强化混凝协同去除机制等关键科学问题，构建以预氧化-强化混凝为核心的协同去除典型硫醚类嗅味物质及天然有机物的工艺技术，为提升饮用水处理工艺提供理论依据和技术支持。

饮用水水源嗅味污染问题频发，嗅味物质与天然有机物（NOM）形成的复合污染给水质安全保障提出了巨大挑战。本项目针对水体中常见的硫醚类嗅味物质-NOM复合污染体系，研究了硫醚类嗅味物质与不同类型有机物（包括腐殖酸，牛血清蛋白及海藻酸钠）间的相互作用，发现蛋白类对硫醚类嗅味物质的复合作用较强；进一步通过对硫醚类嗅味物质的吸附机制研究发现，物质表面碱性官能团，尤其是苯环结构对其复合作用有显著影响。进一步通过混凝对不同天然有机物及硫醚类嗅味物质的去除研究发现，混凝对于硫醚类嗅味物质-牛血清蛋白复合污染体系中的嗅味物质的去除效果较好；基于以上发现，通过预氧化工艺有效改变背景有机物的特性，从而影响背景有机物与硫醚类嗅味物质的相互作用，提高混凝对于硫醚类嗅味物质的去除效能。在此基础上，构建了以预氧化-强化混凝为核心的协同去除典型硫醚类嗅味物质及NOM的工艺技术，为提升饮用水处理工艺提供理论依据和技术支持。