What are the sources of VOCs?

I. Sources of VOCs

Previously, we delved into the definition of VOCs, understanding the differences and commonalities between different countries' definitions. Next, we'll explore the sources of VOCs. It's understood that VOC emissions in the atmosphere can be divided into natural and human sources. Approximately 75% of VOCs originate from natural sources, but in densely populated areas, human sources contribute far more than natural sources.

II. Sources of VOCs - Natural Sources

Natural sources primarily include vegetation emissions, geothermal heat and wildfires, and bio-degradation. Forests and shrubs release isoprene and monoterpenes through secondary metabolism, accounting for 70% of total VOC emissions and representing the largest natural source of VOCs. Volcanic eruptions release methane, mercaptans, and hydrocarbons, among other VOCs. Decomposition by soil microorganisms also releases aldehydes, ketones, and olefins. Furthermore, primary VOC emissions can form new VOCs under sunlight or oxidation conditions, known as "secondary natural sources."

III. Sources of VOCs - Human Sources

Human sources can be further divided into stationary sources, mobile sources and unorganized emission sources.

Stationary Source

Stationary sources involve industries such as petrochemicals, steel smelting, printing and packaging, coating, and pharmaceuticals. These fields release VOCs during the production process through solvent use, biomass combustion, gas escape in waste water treatment, and emissions during the process.

Mobile Source

Mobile sources mainly refer to exhaust gases from transportation such as motor vehicles, ships, and airplanes, as well as VOCs emitted during fuel storage and transportation.

Unorganized Emissions

Unorganized emissions refer to VOCs that are emitted directly into the atmosphere without treatment, such as solvent evaporation at construction and decoration sites; cooking fumes and open-air grilling emissions.

VOCs are also common in daily life. Acetic acid in vinegar, alcohol in alcoholic beverages, and aromatic compounds in perfumes are all VOCs. Even limonene, found in citrus fruits like lemons and oranges as well as household cleaners, is a fragrant VOCs.

Home decoration and furniture are the main sources of VOCs sources in the house, with formaldehyde being a common example. Their single concentration indoors is often not very high, but their combined effect cannot be ignored.

IV. Conclusion

Effective management of VOCs not only requires accurate identification of various sources, but also the construction of a full-process management system. Shandong Eco Nova Group focuses on strengthening the effectiveness of end-of-pipe treatment facilities, and forms core competitive advantages in the field of VOCs waste gas treatment through the double-wheel drive of technological innovation and system optimization.

Shandong Eco Nova Group calls upon all sectors of society to join forces in this battle for blue skies—a war without visible smoke. Only through collective participation can we achieve the dual goals of improving environmental quality and advancing green development!