Proof-of-concept for chemiresistive water quality sensors: free chlorine in drinking water; ammonia in wastewater

化学电阻式水质传感器的概念验证：饮用水中的游离氯；

• 批准号: 566183-2021
• 负责人: Kruse, Peter
• 金额: $ 2.19万
• 依托单位: McMaster University
• 依托单位国家: 加拿大
• 项目类别: Alliance Grants
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=722941
• 关键词: Proof; concept; chemiresistive; water; quality

Water is essential to our life. We take water from the environment, consume it for various purposes, and discharge it back into the environment. Maintaining water quality at all times is very important. Our drinking water, for example, needs to be kept free from pathogens throughout the distribution system by maintaining residual disinfectant levels. Free chlorine is a common disinfectant used for that purpose because it is effective at killing pathogens, even though it is not very stable and can easily deplete during drinking water distribution. This is why continuous online monitoring is desirable at multiple points along the distribution system. Monitoring of wastewater during its discharge into the environment is similarly important. While it is not destined for immediate human consumption, it can severely impact the ecosystem at the discharge site, or downstream of it. In most cases, wastewater will eventually pass by the intake sites of other drinking water systems. The nitrogen content of wastewater, in especially in the form of aqueous ammonia, is of particular concern. Thus, ammonium sensors are commonly deployed at wastewater plants. Both free chlorine and ammonia sensors are being manufactured and distributed by our industrial partner ABB as part of the Aztec and Navigator series of continuous water analyzers. These devices mainly rely on colorimetric and electrochemical sensors. While ABB has succeeded in reducing the reagent consumption of their colorimetric sensors, they nevertheless require periodic maintenance for refills. Electrochemical sensors are typically reagentless, but nevertheless limited by the durability of their reference electrodes. This proposal aims to develop McMaster's chemiresistive technology for use in ABB's online analyzers.

水对我们的生活至关重要。我们从环境中取水，出于各种目的食用，然后将其倒入环境中。始终保持水质非常重要。例如，我们的饮用水需要通过维持残留的消毒水平来避免在整个分配系统中避免病原体。游离氯是用于此目的的常见消毒剂，因为它在杀死病原体方面有效，即使它不是很稳定，并且在饮用水分布期间很容易耗尽。这就是为什么在分配系统沿多个点可以看到连续的在线监视的原因。在排放到环境期间废水的监测同样重要。尽管它不注定要立即进行人类消费，但它可能会严重影响放电现场或下游的生态系统。在大多数情况下，废水最终将通过其他饮用水系统的摄入地点。废水的氮含量特别关注。因此，铵传感器通常部署在废水植物中。我们的工业合作伙伴ABB正在制造和分发免费的氯和氨传感器，这是阿兹台克人和导航器系列连续水分析仪的一部分。这些设备主要依赖于比色和电化学传感器。尽管ABB成功地减少了比色传感器的试剂消耗，但它们仍需要定期维护补充。电化学传感器通常是无试的，但仍受其参考电极的耐用性的限制。该建议旨在开发麦克马斯特的化学技术，用于ABB的在线分析仪。