Disinfection by-products and their precursors in a water treatment plant in North China: Seasonal changes and fraction analysis
Disinfection by-products and their precursors in a water treatment plant in North China: Seasonal changes and fraction analysis
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DOI：
10.1016/j.scitotenv.2008.02.032
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发表时间：
2008-07-01
影响因子：
9.8
通讯作者：
Han, Hong-da
中科院分区：
文献类型：
--
作者：
Chen, Chao;Zhang, Xiao-jian;Han, Hong-da
通过为期一年的监测，分析了华北某水厂常规工艺中三卤甲烷和哈斯的浓度及其沿着生成潜力。其后亦进行了有机物分馏及藻类对前体物贡献的研究，以追踪消毒副产物的来源。结果表明，DBPs的浓度和形成潜力随季节变化而变化。秋季三卤甲烷浓度最高，哈斯生成潜力最大，均接近500 μ g/L，春季最低，均不超过100 μ g/L。有机质和藻类都是DBP的重要前体物质。溶解有机质中的疏水性酸组分具有形成THM和HAA的最高潜力。藻华期间，藻类约占总形成潜力的20%至50%。还分析了每个单元过程对消毒副产物和前体物的效率。不幸的是，传统的饮用水处理工艺在其去除前体的效率方面受到限制。预氯化和过滤过程对DBP或前体物的去除有负面影响。(C)2008 Elsevier B. V.保留所有权利。
A one-year-long monitoring project was conducted to assay the concentrations of THMs, HAAS and their formation potential along the conventional process in a water treatment plant in North China. Subsequent investigations of organic matter fractionation and the contribution of the algae to the precursor were also conducted to trace the source of the DBPs. The results showed that the concentration of DBPs and their formation potential varied with the seasons. The highest concentrations of THMs and the highest HAAs formation potential, each almost 500 mu g/L, were detected in autumn and the lowest were in spring, no more than 100 mu g/L. Both organic matter and algae were found to be important DBP precursors. The hydrophobic acid fraction in dissolved organic matter has the highest formation potential for both THM and HAA. Algae contribute about 20% to 50% of the total formation potential during an algal bloom. The efficiency of each unit process for DBPs and precursors was also assayed. Unfortunately, the conventional drinking water treatment process is limited in its efficiency for precursor removal. The pre-chlorination and filtration process had a negative effect on DBP or precursor removal. (C) 2008 Elsevier B.V. All rights reserved.