空氣凈化器產生臭氧就是死刑了嗎？

02-02

看了很多帖子都說如果凈化器產生臭氧就不可以使用了，臭氧真的就有那麼可怕嗎？我一直覺得臭氧是一個殺菌的好東西啊~而且它的半衰期應該很短吧？

空氣中每立方米百萬分之0.4以內的臭氧含量是安全的。問題是消費者基本沒有檢測能力，而且的確有些空氣凈化器品牌臭氧釋放量超標。消費者並不知道哪個品牌值得信任？所以，還是選擇物理凈化比較踏實。真正專業的品牌還需要市場和時間的檢驗。目前，安全的選擇是50平方以下空間，物理凈化。

一般濃度的臭氧對身體有益。

Med Gas Res. 2011 Dec 20;1:29. doi: 10.1186/2045-9912-1-29.

Mechanisms of Action Involved in Ozone Therapy: Is healing induced via a mild oxidative stress?

Sagai M1, Bocci V.

Author information

Abstract

The potential mechanisms of action of ozone therapy are reviewed in this paper. The therapeutic efficacy of ozone therapy may be partly due the controlled and moderate oxidative stress produced by the reactions of ozone with several biological components. The line between effectiveness and toxicity of ozone may be dependent on the strength of the oxidative stress. As with exercise, it is well known that moderate exercise is good for health, whereas excessive exercise is not.Severe oxidative stress activates nuclear transcriptional factor kappa B (NFκB), resulting in an inflammatory response and tissue injury via the production of COX2, PGE2, and cytokines. However, moderate oxidative stress activates another nuclear transcriptional factor, nuclear factor-erythroid 2-related factor 2 (Nrf2). Nrf2 then induces the transcription of antioxidant response elements (ARE). Transcription of ARE results in the production of numerous antioxidant enzymes, such as SOD, GPx, glutathione-s-transferase(GSTr), catalase (CAT), heme-oxygenase-1 (HO-1), NADPH-quinone-oxidoreductase (NQO-1), phase II enzymes of drug metabolism and heat shock proteins (HSP). Both free antioxidants and anti-oxidative enzymes not only protect cells from oxidation and inflammation but they may be able to reverse the chronic oxidative stress. Based on these observations, ozone therapy may also activate Nrf2 via moderate oxidative stress, and suppress NFκB and inflammatory responses. Furthermore, activation of Nrf2 results in protection against neurodegenerative diseases, such as Alzheimers and Parkinsons diseases. Mild immune responses are induced via other nuclear transcriptional factors, such as nuclear factor of activated T-cells (NFAT) and activated protein-1 (AP-1).Additionally, the effectiveness of ozone therapy in vascular diseases may also be explained by the activation of another nuclear transcriptional factor, hypoxia inducible factor-1α (HIF-1a), which is also induced via moderate oxidative stress. Recently these concepts have become widely accepted. The versatility of ozone in treating vascular and degenerative diseases as well as skin lesions, hernial disc and primary root carious lesions in children is emphasized. Further researches able to elucidate whether the mechanisms of action of ozone therapy involve nuclear transcription factors, such as Nrf2, NFAT, AP-1, and HIF-1α are warranted.

首先要明白空氣凈化器的臭氧是如何產生的，空氣凈化器在使用高壓電離空氣的情況下會產生微量的臭氧，微量的臭氧可以有空氣除味與殺菌的作用，要求的濃度較低，對人體不會造成影響和傷害，濃度要求在0.25 ppm（0.5 mg/m3）以下，在使用臭氧除味殺菌的同時也應該保持室內空氣濕度，在空氣濕度少於50%時臭氧對於空氣中懸浮的細菌病毒的殺滅效果微弱，在95%左右時可以達到最佳效果，換句話說，微量的臭氧在保持空氣濕度的情況下是可以殺滅細菌的，但是超標的臭氧排放則會對人體的呼吸系統造成影響和傷害。另外臭氧在自然環境中會慢慢分解的但是速度不快。

空氣凈化器的空氣凈化功能無法代替空氣的大循環，所以在平常的使用中遇到好天氣還是需要勤開窗通風保持室內與室外的空氣流通交換，一個好的空氣凈化器是可以保持在正常的空氣交換中PM2.5指數不明顯升高的。

主要看使用者的空氣凈化器是否臭氧超標，以及是否對不超標但能聞到的臭氧過敏。如果在使用空凈的同時有新風系統來保證屋內空氣流通，減少屋內臭氧濃度超標的可能性。那麼空凈產生臭氧就不是死刑。但是從國內使用者的角度來說，你產生臭氧就算不超標，也對使用體驗產生負效應。因為臭氧的氣味是類似魚腥味的。這並不好聞。至於半衰期一般是半小時左右。

但考慮國內的情況，如果某些時候，戶外臭氧超標，你在屋內繼續使用產生臭氧的空氣凈化器。這就會變得比較黑色幽默了。因為戶外的臭氧空氣進入室內和室內產生的臭氧疊加。這時候就可能臭氧超標。

對於」空氣凈化器產生臭氧不能使用」這種說法是錯誤的，根據國際臭氧協會規定濃度： 0.1 ppm，接觸10小時；美國： 0.1 ppm，接觸 8小時，德、法、日本： 0.1 ppm，中國：0.15ppm。臭氧在空氣中不僅可以殺菌，還可以除臭味、除甲醛等有機揮發物的作用，從而達到凈化空氣的作用，而臭氧在殺菌、除甲醛後產物為氧氣，二氧化碳和水等氣體小分子。臭氧在室內20-50min分解為氧氣，不會造成二次污染。

一般少量的臭氧是對身體有益的，大量的臭氧含量才會對身體造成傷害

空氣凈化器不過是一個初效-中效-亞高效過濾器。。。