蓝藻AOM特征与DBPs生成关系的研究进展

蓝藻水华期间,藻细胞因自然生长或受水处理工艺影响(如预氧化和混凝),会向水中释放大量藻源有机物(AOM),能够与氯消毒剂反应生成大量消毒副产物(DBPs),增加了饮用水安全风险.了解AOM的特征及其对DBPs生成的影响对于AOM的控制和饮用水安全保障至关重要.本文综述了蓝藻AOM的主要理化特征(溶解性有机碳、溶解性有机氮、亲疏水性、光学特性、分子量、化学结构)及其对饮用水处理过程中AOM的削减转化规律和DBPs生成的影响,并讨论了AOM前体表征技术在蓝藻水处理过程中追踪AOM变化和预测DBPs的应用前景,最后展望了未来的研究方向.

Research progress on relationship between algal organic matter characteristics and disinfection byproducts formation

During cyanobacteria blooms, a large amount of algal organic matter (AOM) can be released into water from cyanobacterial cells due to cell growth and/or effect of drinking water treatment processes (e.g., pre-oxidation and coagulation). AOM can react with chlorine to generate numerous disinfection byproducts (DBPs), which could increase health risk of drinking water. Accordingly, for a better control of AOM-derived DBPs, it is of paramount importance to study the relationship between AOM characteristics and DBPs formation. This paper provided a brief review on main physicochemical characteristics of AOM (i.e., dissolved organic carbon, dissolved organic nitrogen, hydrophobicity, optical features, molecular weight, and chemical structure) and their effects on AOM reduction/transformation and DBPs formation in drinking water. Furthermore, this paper discussed future applications of AOM precursor characterization methods to AOM tracing and DBPs prediction during cyanobacteria-polluted water treatment processes, with prospects of future research.