Toor Ramn, Mohseni Madjid
Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, BC, Canada V6T 1Z3.
Chemosphere. 2007 Feb;66(11):2087-95. doi: 10.1016/j.chemosphere.2006.09.043. Epub 2006 Nov 13.
The presence of disinfection byproducts (DBPs) such as trihalomethanes (THMs) and haloacetic acids (HAAs) in drinking water is of great concern due to their adverse effects on human health. Emerging regulation limiting the concentration of DBPs in drinking water has increased demands for technologies and processes which reduce the formation of DBPs in drinking water. In this study, UV-H2O2 based advance oxidation process (AOP) was used to treat raw surface water. Experiments were conducted using low pressure mercury vapor UV lamps in collimated beam and flow-through annular photoreactors. The effect of UV fluence (0-3500 mJ cm(-2)) and hydrogen peroxide concentration (0-23 mg l(-1)) in reducing the concentration of THMs and HAAs was examined. The UV-H2O2 AOP was then coupled with a downstream biological activated carbon (BAC) treatment to assess the synergetic benefits of combining the two treatments. It was observed that UV-H2O2 AOP was only effective at reducing DBPs at UV fluences of more than 1000 mJ cm(-2) and initial H2O2 concentrations of about or greater than 23 mg l(-1). However, the combined AOP-BAC treatment showed significant reductions of 43%, 52%, and 59% relative to untreated raw water for DBPs, TOC, and UV254, respectively.
饮用水中存在的消毒副产物（DBPs），如三卤甲烷（THMs）和卤乙酸（HAAs），因其对人体健康的不利影响而备受关注。新出台的限制饮用水中DBPs浓度的规定，增加了对减少饮用水中DBPs形成的技术和工艺的需求。在本研究中，采用基于UV-H2O2的高级氧化工艺（AOP）处理原地表水。实验使用低压汞蒸气紫外灯在准直光束和流通环形光反应器中进行。研究了紫外通量（0 - 3500 mJ cm(-2)）和过氧化氢浓度（0 - 23 mg l(-1)）对降低THMs和HAAs浓度的影响。然后将UV-H2O2 AOP与下游生物活性炭（BAC）处理相结合，以评估两种处理相结合的协同效益。结果发现，UV-H2O2 AOP仅在紫外通量超过1000 mJ cm(-2)且初始H2O2浓度约为或大于23 mg l(-1)时，对降低DBPs有效。然而，AOP与BAC联合处理相对于未处理的原水，DBPs、TOC和UV254分别显著降低了43%、52%和59%。
