Scientists are exploring specific wavelengths of UVC light that are safe for humans.
Most UVC lamps emit a broad spectrum of UVC wavelengths (200–280 nanometers) or a specific wavelength of 254 nanometers. Studies have shown that shorter wavelengths of UVC light (such as 222 nanometers) can also inactivate airborne viruses (including SARS-CoV-2) and other microorganisms. This wavelength of UVC light is often referred to as far-UVC light and may be safe to use in occupied spaces. In studies on mice and rats, no damage to the skin or eyes was found from long-range UVC light. However, more research is needed to verify that people can be exposed to this wavelength for a period of time without harmful side effects." "What is a UV Lamp
Ultraviolet lamp is a kind of lamp product that can emit ultraviolet rays. It is also an essential tool for observing samples in the field of biochemistry. It is also used for indoor disinfection and the most important physical method to reduce the generation of bacteria. Ultraviolet lamps can emit wavelengths within 10-400nm, and are also used in the production of various functional lamps, such as strong ultraviolet high-pressure mercury lamps, capillary ultra-high pressure mercury lamps, ultraviolet iron lamps, excimer discharge lamps, etc.
UV Lamp Features
1. The light radiated by ultraviolet rays will change the genetic structure of microorganisms and damage the DNA, so that the microorganisms lose their reproductive and repair functions, and finally achieve the inhibitory effect of bacteria. In addition, the use of ultraviolet light for sterilization work, without worrying about the generation of odor, and no harmful chemical components will remain. Due to its colorless properties, it has been gradually used in many modern water treatment and has been put into treatment in many countries.
2. Ultraviolet lamps actually use mercury lamps to emit ultraviolet rays, and the released amount is relatively large. If certain protective measures are not taken, it is easy to cause great damage to the human body. If the skin is exposed to ultraviolet light, the degree of itching, redness, peeling and other problems will occur to a certain extent. If the degree is serious, it will cause skin diseases. In addition, such lamps also have a great impact on the human eye. Staying in the radiation space for a long time is easy to cause inflammation of the corner of the eye, and even suffer from cataracts.
3. Ultraviolet lamps are also widely used in automotive applications, and these lamps have a variety of styles, which not only play a good role in disinfection and sterilization, but also have a certain decorative effect. After the car is treated with ultraviolet light, the air inside is fresh, the odor is completely removed, and it will not cause harm to the human body.
4. Ultraviolet lamps have a significant effect on indoor disinfection, will not affect the environment, and reduce the generation of pollution. However, when using it, care should be taken to avoid direct contact with the skin and eyes of the lamp to reduce the impact of radiation.
The last thing I need to mention is that the anti-mosquito UV lamps used in restaurants and milk tea shops are different from the UV lamps introduced above. Therefore, consumers do not need to worry about radiation problems and can use them with confidence." "Disinfection principle
Ultraviolet rays can be divided into three types: UVA, UVB, and UVC.
These three kinds of ultraviolet rays all have a certain sterilization and disinfection effect, and now it is also a broad-spectrum sterilization and disinfection method, which can disinfect and sterilize the surface of objects, indoor air quality, water and other liquids. But short- and medium-wave ultraviolet rays are very harmful to the body, burning the skin in a short time, and long-term or high-toughness skin cancer. There are generally two types of ultraviolet germicidal lamps on the market: simple ultraviolet lamps and active oxygen lamps.
UVC ultraviolet sterilization time
At this stage, the sterilization efficiency of UVC is still very high, and there is no promotion technology. The sterilization efficiency is 99%-99.9%, and the general sterilization time of several bacteria and viruses is generally within 1 second. Traditional organic chemical disinfection methods such as hydrogen and active oxygen generally take 20 minutes to 1 hour to achieve the actual sterilization effect of ultraviolet UVC, which varies greatly.
In fact, we can see the very simple initial ultraviolet germicidal lamp in many places, as long as the area irradiated by ultraviolet rays can be reasonably disinfected.
For reactive oxygen species, the key to sterilization is that it is an oxidizing agent, and redox reactions according to cell biology can make bacteria unspecific.
The addition of this aspect is mainly to better fill the bug that the ultraviolet rays can only be directly exposed. It is easy to understand that reactive oxygen species can be encapsulated in the dark parts that are not exposed to ultraviolet rays, and there will always be barriers in the home environment, and these blocked parts are precisely the areas where bacteria and viruses are most likely to grow. Therefore, blind spots can be taken care of by disinfecting the entire house with reactive oxygen species.