What does environmental voc mean?

VOC refers to volatile organic compounds (volatile organic compounds? The abbreviation of compound refers to organic compounds with saturated vapor pressure greater than 70.9 1Pa at room temperature and boiling point less than 260℃ at atmospheric pressure.

But from the point of view of environmental protection, it refers to the total non-methane hydrocarbons detected by the hydrogen flame ion detector, mainly including alkanes, aromatics, olefins, halogenated hydrocarbons, esters, aldehydes, ketones and other organic compounds, that is, the kind of volatile organic compounds that will cause harm.

The pollution sources of VOC are divided into fixed sources and mobile sources. Coal, oil and natural gas, or industries with coal, oil and natural gas as fuel or raw materials, and their related chemical industries are three important sources of volatile organic compounds.

Extended data:

Hazards of volatile organic compounds:

1. Most volatile organic compounds are toxic. Common indoor volatile organic compounds come from decoration building materials, carpets, printers, furniture, paint thinner, glue, cosmetics, some sprays and plastic products. According to the report of the Environmental Protection Agency, if there is not enough ventilation equipment to circulate the air and VOC exists indoors, the indoor air pollution will be 10 times more serious than the outdoor air.

2. Some volatile organic compounds are carcinogenic. Because they are harmful to human body, the national standard implemented since July 6, 2005 stipulates that the VOC of indoor latex paint should be less than or equal to 200g/L, and the VOC content should be less than 6.5438+000g/L if environmental protection "ten ring mark" is to be obtained.

References:

VOC- Baidu encyclopedia