Abstract:

Humic acid natural organic matter in water is an important factor affecting water quality, and it is difficult to remove humic substances from water by conventional process. Due to its high efficiency, low energy consumption and wide application range, oxidation and its combined technologies have gradually become pretreatment technologies for removing such pollutants. Ozone, potassium permanganate and other oxidants with strong oxidizing characteristics have replaced the traditional oxidant - chlorine, which can effectively decompose NOM into non-toxic small molecules, reduce the risk of mutagenesis of drinking water quality. Among oxidation technologies, ozone is advantageous in terms of safety and side effects, but the single oxidation technology has different degrees of limitations. According to different water conditions at home and abroad, the oxidation mechanism, synergistic effect, removal effect and application status of oxidation technology-coagulation process and other combined technologies to remove humic acid in water were compared in detail, and the research progress of different oxidation and its combined technologies to remove NOM in water was discussed. The analyses showed that oxidation technology combined processes have become the mainstream process to remove humic acid in water, and point out that the pre-oxidation-membrane combined technology has a wide application prospect because of its good synergistic property.

Key words: oxidation technology, humic acids, drinking water, combined technologies

摘要：

水体中的腐殖酸类天然有机物是影响水质重要因素之一，仅靠常规工艺难以去除水中腐殖质。氧化及其联用技术因效率高、能耗低、适用范围广，逐步成为去除此类污染物的预处理技术，臭氧、高锰酸钾等氧化剂具有较强氧化性的特点，已取代传统氧化剂-氯气，能有效将水中天然有机物（natural organic matter，NOM）分解为无毒小分子物质，且降低了饮用水水质致突变风险，其中，臭氧在安全性和副作用方面更具优势，但单一氧化技术存在不同程度的局限性。针对国内外不同水体状况，本文详细比较了氧化-混凝等联用技术去除水中腐殖酸的氧化机理、协同作用、去除效果和应用状况，探讨了不同的氧化及其联用技术去除水中NOM的研究进展情况，分析表明氧化技术组合工艺已成为去除水中腐殖酸的主流工艺，并指出预氧化-膜联用技术因其良好的协同性而具有广泛的应用前景。

关键词: 氧化技术, 腐殖酸, 饮用水, 联用工艺