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Air Quality News

你正在让臭氧污染你的房子吗?

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Air Quality News from IQAir

尽管您一直在尽力为家庭创造空气清洁的环境,然而事实上,不当的空气净化设备可能正在让危险的臭氧危害您的健康。 一些空气净化器制造商仍旧坚称,能产生臭氧的产品是净化室内空气的安全有效方式。 这些公司使用“活性氧”和“山地新鲜空气”等词语误导公众。美国环保署(EPA)表示,产生臭氧的空气净化技术既不安全也没什么效率。 事实上,它们非但不会让人们呼吸更加顺畅,反而会让人患上疾病。

“在高空中有益 - 接近人体却有害”


臭氧是由三个氧原子组成的活性气体。臭氧层位于地球高空大气层,能够保护人体皮肤免受紫外线的伤害。然而一旦吸入,既会刺激人体的喉咙和肺脏,引起咳嗽、胸口疼痛、呼吸急促和过敏。 长期接触臭氧甚至会导致早死。 这就是为什么 EPA 用“在高处是好的—但在附近却有害”的短语来标记臭氧层与我们吸入的臭氧的区别。

不幸的是,人类吸入的大部分臭氧都是人类自己制造出来的。地面臭氧是烟雾的主要成分,是在发电厂排泄的废气或机动车尾气等污染物在日光照射下产生的。美国环保署意识到室外臭氧污染的危险,并按照《洁净空气法》建立了相关标准,以保护环境和人类健康。 然而,室内臭氧完全是另外一种情况。

产生臭氧的“空气净化器”确实会产生污染


第三方实验室UL的标准 867 规定,家庭空气净化器产生的臭氧浓度不能超过十亿分之五十。然而,即使是这样浓度的臭氧也会危害人的健康。加利福尼亚空气资源委员会(CARB)的测试表明,很多所谓的空气净化器产生的臭氧浓度超过了十亿分之三百。 根据 CARB 的说法,“这些臭氧的危害程度甚至超过了一级烟雾警戒。”

但是真正的问题是,这些生成臭氧的空气净化器并不能有效净化空气。 按照美国环保署的说法,这些净化器既不能清除灰尘、花粉、细菌和霉菌孢子等空气中的颗粒,也不能有效去除引起异味的化学物质。 臭氧除了会破坏人的呼吸系统外,还会与其他化学物质反应形成甲醛和超细颗粒等有毒产物。

改善室内空气质量的措施


为了安全和有效地改善室内空气质量,EPA 建议采取以下措施(按照效果顺序):

  • 源头控制 保持房屋干净,消除或控制污染源。
  • 通风 适时候打开房门和窗户,让新鲜空气进入。
  • 空气净化 使用机械过滤等安全技术清除空气中的颗粒物和气体,控制异味。

更多有关产生臭氧的空气净化器的危害信息,请访问美国 EPA 网站 www.epa.gov/iaq/pubs/ozonegen.html

点击此处下载本文的 PDF 文档。

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