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）进行水处理在市政当局中越来越受欢迎。虽然价格昂贵，但它在传统治疗不足以解决问题的情况下提供了高度的有效性。例如，处理废水以直接转化为饮用水，或处理含有能抵抗其他形式氧化的污染物的饮用水，例如可能有毒或导致难闻味道和气味的藻类副产品。 这是一个为期 2 年的项目，探索一种新型的高级氧化过程：通过紫外线光解氯。紫外线/氯已被证明非常有效，但几乎完全缺乏有关可能形成不良副产物的信息。监管机构和公用事业公司在愿意广泛接受这种新的治疗方式之前将需要这些信息。该项目将识别在一系列处理条件下可能形成的特定副产物，并采用筛选工具来检测潜在的毒性。总体研究假设是，使用紫外线/氯时副产物或毒性的形成并不比使用传统氯化法对饮用水进行消毒时产生的副产物或毒性更大。通过使用传统的饮用水作为基准，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所带来的风险是否可能大于或小于自来水目前认为这是可以接受的。