Copying machine is based on the photoconductive principle of selenium drum, which is generally safe and will not endanger human health. However, due to the static electricity during the operation of the copier, some ozone molecules will be produced in the indoor air. Ozone is a strongly oxidizing gas, and nitrogen in the air will react with it to generate nitrogen oxides. These gases have a strong stimulating effect on human respiratory tract. If the copy room is poorly ventilated, the operator will inhale a large amount of high-concentration ozone in a short time, causing discomfort such as cough and dry mouth. If ozone and nitrogen compounds stay in the lungs for a long time, they will also induce toxic emphysema and cause nervous system diseases. And the toner brought by static electricity is harmful to health when inhaled into human body. In addition, the strong light generated when the copier works will also cause harm to the eyes.
It is not difficult to prevent the health hazards caused by photocopiers. As long as you do the following, you can use this kind of good office helper that can effectively improve office efficiency.
First of all, the copy room should be well ventilated. If the room is not ventilated, an exhaust fan should be installed to ensure fresh indoor air. Every working cycle, the operator should take a rest outdoors.
Secondly, in the working process of the copier, it is necessary to cover the upper baffle to reduce the irritation of strong light to the eyes.
Third, the copier should be cleaned regularly, and the waste ink cartridges should be carefully removed to prevent excessive toner in the air from being inhaled by the human body.
Finally, remind OL who deals with the copier every day to wash his hands in time after using the copier to eliminate the harm of residual dust on his hands to human body.
When the electrostatic copier is used, oxygen molecules (O2) in the surrounding air will be ionized to form atomic oxygen (O), which will combine with the surrounding oxygen molecules to form ozone (O3). Ozone is a strong oxidant with fishy smell, its specific gravity is 1.66 times that of air, and it is often concentrated in the lower space of the office. High concentration ozone strongly stimulates human respiratory tract, causing sore throat, chest tightness and cough, bronchitis and emphysema. Ozone can cause people's neurotoxicity, dizziness, headache, vision loss and memory loss; Ozone can destroy vitamin E in human skin, leading to wrinkles and dark spots on human skin. Ozone can also destroy the immune function of human body, induce lymphocyte chromosome lesions, accelerate aging, and make pregnant women give birth to deformed children.
Secondly, in the process of using the copier, in addition to high-concentration ozone harmful to human health, some toner of the copier will escape during high-temperature and high-speed movement, producing a certain amount of dust. The organic waste gas generated by toner heating is a strong carcinogen, which will cause various cancers and cardiovascular diseases. Due to the use of polymer materials for development and fixing, a small amount of harmful organic gases (such as styrene) will also be produced, which is also harmful to human body. These harmful substances inhaled by people will remain in the human body forever and cannot be ruled out. Long-term exposure can cause nervous system symptoms such as xerostomia, chest tightness, cough, bronchitis, toxic pulmonary edema, headache, dizziness and nausea. Therefore, people must attach great importance to the harm caused by ozone and organic waste gas.
Ozone is a double-edged sword.
1. Sterilization and disinfection: Studies have shown that ozone is a broad-spectrum, efficient and fast disinfectant, which can quickly kill all kinds of germs, viruses and microorganisms that cause diseases to people and animals. Ozone is a very oxidizing substance, and its redox potential is second only to F2. Using its oxidation, the biological structure of bacteria, viruses and other microorganisms can be destroyed in a short time, making them lose their viability. There are many compounds that kill microorganisms by oxidation to achieve sterilization effect, such as common chlorine, bleaching powder, potassium permanganate and so on. But these fungicides are not only slower than ozone, but also harmful to human body. Ozone is different from ordinary bactericides, because excess ozone can be quickly decomposed into oxygen, which is beneficial and harmless to human body. The bactericidal effect of ozone is equivalent to that of oxyacetic acid, stronger than that of formaldehyde and twice that of chlorine. Different from the gradual and cumulative sterilization of general fungicides, the sterilization of ozone is rapid, and when its concentration exceeds a certain threshold, the sterilization can even be completed instantly. The increase of humidity and the decrease of temperature can enhance the disinfection effect of ozone When ozone is dissolved in water, it has a stronger and faster disinfection effect. Ozone sterilization has no secondary pollution, and there is no harmful substance residue in treated water, air, food and utensils. This is also an incomparable advantage of other fungicides.
2. Detoxification: Ozone can effectively remove toxic gases such as CO, NO, SO2 and mustard gas through oxidation reaction. Ozone dissolved in water can be oxidized and decomposed, effectively removing toxic substances such as heavy metal ions, organic poisons, cyanide and sulfide, and pesticides such as dichlorvos, omethoate and malathion. Ozone used in water disinfection can greatly reduce organic carcinogens such as halogenated hydrocarbons in tap water.
3. Preservation: Because ozone water has a strong killing effect on bacteria and microorganisms, treating fish and other foods with ozone water can achieve the effects of preservation, deodorization and preservation. When ozone is produced, it can also produce a lot of negative ion oxygen. Some negative ions in the air can effectively inhibit the respiration of fruits and vegetables and delay their metabolic process. At the same time, ozone can kill pathogenic bacteria causing fruit and vegetable rot, and decompose metabolic wastes such as ethylene, alcohols, aldehydes, aromatics and other substances with ripening effect during fruit and vegetable storage. In this way, under the action of ozone and negative ions, the metabolism of fruits and vegetables and the propagation and spread of microbial pathogens are inhibited, thus delaying the maturity and aging of fruits and vegetables, preventing them from rotting and deteriorating, and achieving the effect of preservation. Studies have shown that ozone can prolong the shelf life of food, beverage, fruit and vegetables by 3- 10 times.
4. Deodorization: The main components that cause odor and corruption in nature are ammonia, hydrogen sulfide, methyl mercaptan, dimethyl sulfide and dimethyl disulfide. Ozone can react with them and decompose them into non-toxic and odorless substances, thus achieving the effect of deodorization.
To put it bluntly, mainly in the concentration of ozone produced by photocopiers, no data in this regard have been found.
When ozone reaches a certain concentration in the atmosphere, it will cause environmental pollution. Our country stipulates that when the ozone concentration exceeds 0. 1mg/m3 in the living environment, it constitutes air pollution; In the workplace, when the ozone concentration exceeds 0.2mg/m3, it constitutes pollution.
Hygienic standard for ozone industry:
International Ozone Association: 0. 1 ppm, contact 10 hour.
United States: 0. 1 ppm, contact for 8 hours.
Germany, France and Japan: 0. 1 ppm
China: 0. 15ppm