A standard mercury thermometer contains one gram of mercury, and if all the mercury in it evaporates, it can make a room 15 square meters large and three meters high with a mercury concentration of 22.2 milligrams per cubic meter, which is much higher than the maximum allowable concentration of 0.01 milligrams per cubic meter set by the state.
For human beings, a normal person in a room with a mercury concentration of 1 to 3 mg per cubic meter may get a headache and fever in less than two hours, have difficulty breathing, and suffer from mercury poisoning.
Safety of Mercury Exposure
Mercury vapor, whether from industrial exhaust, spills, or broken thermometers, can be extremely damaging to anyone. It is the most dangerous form because it is absorbed by the lungs, allowing much of it to reach the brain. Inhaling mercury does not cause side effects quickly.
The effects of mercury poisoning may include:
Household waste can generally be divided into four main categories: recyclable waste, food waste, hazardous waste, and other waste.
Waste mercury thermometers are categorized as hazardous waste in our country. If your city has already categorized garbage for recycling, it is recommended to wrap the mercury thermometer with a sponge (to prevent the thermometer from breaking when dumping the garbage and the mercury from being exposed to the staff) and put it into the red hazardous garbage can as shown in the picture above. If your city has not yet done waste separation and recycling, it is recommended to wrap the thermometer with a sponge and put it into a plastic bottle, mark it well, and then look for an open and uninhabited place to bury it.
The ultimate way - permanent decontamination (mercury vapor damage to the human body), once and for all, fast (do not a minute), convenient (no need to cumbersome operation), that is, one of the mercury poured into the sulfur, mercury and sulfur immediately generate mercury sulfide.
Because the mercury thermometer is not applicable to throw directly into the trash, the best way is to mark it, and then go to the nearby hospital to throw it into the yellow medical waste trash can, so that it can be
Buried deep in the ground on the line.
As the "warmest university", NUIST has equipped all students with specially customized "Xindanwei temperature" mercury thermometers, which not only measure temperature, but also become a special time for the school to witness the warmth. The thermometers will not only measure the temperature, but will also be a witness to the warmth of the school during the special period.
But do you really know the correct way to use a mercury thermometer? What do you need to pay attention to? In case of accidental break, and how to deal with it? Let's come together to understand it!
How to use the mercury thermometer and the precautions
1. First of all, before you use it, be sure to check whether the thermometer is broken, broken thermometers can not be used, the thermometer must be avoided to avoid hard objects, so as not to touch the broken thermometer.
2. Pay attention to the timing of the measurement, eating, drinking, exercise after sweating body temperature will change, so to avoid these times, if there are these cases, it is best to rest for half an hour before measurement.
3. After checking, you have to look at the mercury column on the thermometer, that is, the current temperature is not below 35 degrees, and then put it in the armpit, clamp it, and take it out after sitting still for 5 minutes.
4. After taking out the thermometer, do not shake, and do not touch the thermometer's metal head with your hand, slightly rotating the thermometer, you can see a column of mercury money, the line to the number, is the measured body temperature.
5. After using the thermometer, it is best to wipe it with alcohol, on the one hand, it can be sterilized, on the other hand, alcohol is volatile, it can make the temperature of the mercury column down, and then carefully stowed into the shell, put it into a drawer and other secure places.
In addition, mercury is harmful to the human body, if accidentally broken, please follow the following matters:
1. Once the mercury thermometer is broken, you should clean up the glass debris in a timely manner to prevent stabbing.
2. Clean up the mercury in time to prevent mercury contamination of the ambient air.
3. Clean up the mercury, to avoid direct contact with the hand, you should wear gloves, folded into a dustpan shape with hard paper will be collected, or with a small wet cotton swab or tape paper will be spilled on the ground mercury stick up, put into a small bottle can be sealed, and add a small amount of water in the bottle to be closed, the bottle is labeled "waste mercury" and other words, and sent to our school. and other words, sent to the school clinic medical waste storage point management personnel, and sent to the environmental protection department to deal with.
4. Indoor personnel temporarily leave the room, turn off all indoor heating devices, open the windows to ventilate. Call the outpatient department duty phone 120 to consult the medical staff.
5. If inadvertently taken by mistake, should immediately seek medical attention, under the guidance of a doctor, rinse the mouth with cold water and then take milk or raw egg white to ease the body's absorption of mercury, and closely observe the changes in vital signs and clinical manifestations. If symptoms of poisoning appear, immediately carry out symptomatic treatment.
Mercury thermometer when using the notes you have remembered? The next time you use it, be sure to pay attention to it! The epidemic will eventually be controlled, and I hope to return to school to see you again, masks off, to see everyone's long-lost smile!
Don't throw them away, don't destroy them, just find a place to put them.
Electronic thermometers, because of environmental factors, leading to a relatively large error in measurement. I originally thought that electronic thermometers were good to use, the first to buy a non-contact used to measure the temperature of the child, found that the error is serious, the child fever can only use the electronic thermometer roughly measured, to see if the child is a fever, and then use the mercury to measure the specific temperature.
Later on, I thought it would be too much of a hassle to know whether my child had a fever or not, so I used the back of my hand to touch it, and then I had to use the electronic thermometer. I bought a contact thermometer and thought it would be a good idea to get it right. To be honest, when I first started to use it, it was really good, mainly because of the short measuring time, compared to the mercury measuring time of 3 minutes, electronic as long as a few dozen seconds is much faster. But then I do not know what reason, this contact electronic thermometer and out of the problem, the error is getting bigger and bigger.
Electronic is when the problem, you do not know, this is too much delay, especially after the child to take medicine, waiting for fever, half an hour to measure once. This time the thermometer out of the problem, that is really anxious to jump feet. The child's fever is often in the middle of the night, when you want to buy a thermometer have no place to buy.
Mercury, as long as not broken his measurement temperature is accurate. Stability overrides everything, and eventually the mercury thermometer out of use, electronic reduced to a child's toy.
Well the questioner, know what to do with the extra thermometer at the moment.
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