Exploring toxicity and byproducts formed when using UV-chlorine advanced oxidation for drinking and reuse waters

使用紫外线和氧化剂(一种称为高级氧化的过程)相结合的水处理在市政当局中越来越受欢迎。虽然价格昂贵，但在常规治疗不够充分的情况下，它提供了高度的有效性。例如，对直接转化为饮用水的废水进行处理，或对含有可抵抗其他形式氧化的污染物的饮用水进行处理，如可能有毒或产生难闻味道和气味的藻类副产品。 这是一个为期两年的项目，探索一种新型的高级氧化工艺：通过紫外光光解氯。紫外线/氯已被证明是非常有效的，但关于可能产生不良副产品的信息几乎完全缺乏。监管机构和公用事业公司在愿意广泛接受这种新形式的治疗之前，将需要这些信息。该项目将确定在一系列处理条件下可能形成的特定副产品，并使用筛查工具来检测潜在的毒性。总体研究假设是，使用紫外线/氯消毒饮用水时，副产物或毒性的形成不会比使用传统氯化消毒时更大。通过使用常规饮用水作为基准，我们可以允许UV/氯形成一些可测量的副产品或毒性，同时仍然能够在相对意义上确定它所带来的风险可能大于或低于目前被认为是可接受的自来水。

Water treatment using ultraviolet light coupled with an oxidant (a process called advanced oxidation) is gaining popularity among municipalities. While expensive, it offers a high degree of effectiveness in situations where more conventional treatment is not sufficient. Examples include the treatment of wastewaters for direct conversion to drinking water, or the treatment of drinking waters that contain contaminants that are resistant to other forms of oxidation, such as algal byproducts that can be toxic or cause unpleasant tastes and odours. This is a 2 year project that explores a novel form of advanced oxidation process: the photolysis of chlorine by UV light. UV/chlorine has been demonstrated to be very effective, but information about the formation of possible undesirable byproducts is almost completely lacking. Regulators and utilities will require this information before they are willing to widely accept this new form of treatment. The project will identify specific byproducts that may form under a range of treatment conditions, and also employs screening tools to detect potential toxicity. The overall research hypothesis is that the formation of byproducts or toxicity when using UV/chlorine is no greater than when using traditional chlorination to disinfect drinking water. By using conventional drinking water as a benchmark, we can allow for UV/chlorine to form some measurable amount of byproducts or toxicity while still being able to determine in a relative sense whether it presents a risk that is likely greater than or less than tap water that is currently considered to be acceptable.