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

探索使用紫外线-氯高级氧化处理饮用水和回用水时形成的毒性和副产物

• 批准号: 543834-2019
• 负责人: Hofmann, Ron
• 金额: $ 5.45万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=699476
• 关键词: Exploring; toxicity; byproducts; formed; when

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.

使用紫外线和氧化剂（称为高级氧化的过程）的紫外线处理在市政当局中变得越来越受欢迎。虽然昂贵，但它在不够常规治疗的情况下具有高度的有效性。例子包括处理废水以直接转化为饮用水的处理，或处理含有耐污染物的饮用水，这些污染物对其他形式的氧化作用，例如藻类副产品，可能有毒或引起不愉快的口味和异味。 这是一个为期2年的项目，探讨了一种新型的晚期氧化过程形式：紫外线对氯的光解。紫外线/氯已被证明非常有效，但是几乎完全缺乏有关可能不良副产品形成的信息。监管机构和公用事业将需要此信息，然后才能广泛接受这种新的治疗形式。该项目将确定可能在一系列治疗条件下形成的特定副产品，还采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/氯时的副产物或毒性的形成不比使用传统氯化来消毒饮用水时大。通过将常规饮用水作为基准，我们可以允许紫外线/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是否带来的风险可能大于或小于当前被认为是可接受的自来水。