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Disinfection and Electrostatic Recovery of N95 Respirators by Corona Discharge for Safe Reuse
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2021-09-27 , DOI: 10.1021/acs.est.1c02649 Sriram S K S Narayanan 1 , Xudong Wang 2 , Jose Paul 1 , Vladislav Paley 1 , Zijian Weng 1 , Libin Ye 2, 3 , Ying Zhong 1
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2021-09-27 , DOI: 10.1021/acs.est.1c02649 Sriram S K S Narayanan 1 , Xudong Wang 2 , Jose Paul 1 , Vladislav Paley 1 , Zijian Weng 1 , Libin Ye 2, 3 , Ying Zhong 1
Affiliation
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With the COVID-19 pandemic surging, the demand for masks is challenging, especially in less-developed areas across the world. Billions of used masks are threatening the environment as a new source of plastic pollution. In this paper, corona discharge (CD) was explored as a safe and reliable method for mask reuse to alleviate the situation. CD can disinfect masks and simultaneously restore electrostatic charges to prevent filtration efficiency deterioration. Electric field, ions, and reactive species generated by CD cause DNA damage and protein denaturation to effectively disinfect N95 respirators. Log reduction of 2–3 against Escherichia coli can be easily reached within 7.5 min. Log reduction of up to 6 can be reached after three cycles of treatment with optimized parameters. CD disinfection is a broad spectrum with log reduction >1 against yeast and >2.5 against spores. N95 respirators can be recharged within 30 s of treatment and the charges can be retained at a higher level than brand-new masks for at least 5 days. The filtration efficiency of masks was maintained at ∼95% after 15 cycles of treatment. CD can provide at least 10 cycles of safe reuse with benefits of high safety, affordability, accessibility, and device scalability/portability.
中文翻译：
通过电晕放电对 N95 呼吸器进行消毒和静电回收以实现安全重复使用
随着 COVID-19 大流行的激增，对口罩的需求充满挑战，尤其是在全球欠发达地区。数十亿个用过的口罩作为塑料污染的新来源正在威胁环境。在本文中，电晕放电 (CD) 被探索为一种安全可靠的口罩重复使用方法，以缓解这种情况。CD可以对口罩进行消毒，同时恢复静电荷，防止过滤效率下降。CD 产生的电场、离子和活性物质会导致 DNA 损伤和蛋白质变性，从而对 N95 呼吸器进行有效消毒。对数减少 2–3 对抗大肠杆菌可以在 7.5 分钟内轻松到达。在优化参数的三个治疗周期后，对数减少最多可达 6。CD 消毒是广谱的，对酵母的对数减少 >1，对孢子的对数减少 >2.5。N95口罩可在处理后30秒内重新充电，且充电量可保持在比全新口罩更高的水平至少5天。经过15个循环处理后，口罩的过滤效率保持在~95%。CD 可以提供至少 10 次安全重用周期，具有高安全性、可负担性、可访问性和设备可扩展性/便携性的优点。
更新日期：2021-11-16
中文翻译：
通过电晕放电对 N95 呼吸器进行消毒和静电回收以实现安全重复使用
随着 COVID-19 大流行的激增，对口罩的需求充满挑战，尤其是在全球欠发达地区。数十亿个用过的口罩作为塑料污染的新来源正在威胁环境。在本文中，电晕放电 (CD) 被探索为一种安全可靠的口罩重复使用方法，以缓解这种情况。CD可以对口罩进行消毒，同时恢复静电荷，防止过滤效率下降。CD 产生的电场、离子和活性物质会导致 DNA 损伤和蛋白质变性，从而对 N95 呼吸器进行有效消毒。对数减少 2–3 对抗大肠杆菌可以在 7.5 分钟内轻松到达。在优化参数的三个治疗周期后，对数减少最多可达 6。CD 消毒是广谱的，对酵母的对数减少 >1，对孢子的对数减少 >2.5。N95口罩可在处理后30秒内重新充电，且充电量可保持在比全新口罩更高的水平至少5天。经过15个循环处理后，口罩的过滤效率保持在~95%。CD 可以提供至少 10 次安全重用周期，具有高安全性、可负担性、可访问性和设备可扩展性/便携性的优点。
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