What are UFPs?

Ultrafine particles (UFPs) are aerosols with an aerodynamic diameter of 0.1 µm (100 nm) or less. There is a growing concern in the public health community about the contribution of UFPs to human health. Despite their modest mass and size, they dominate in terms of the number of particles in the ambient air.

Are ultrafine particles carcinogenic?

These particles can get into the lungs and translocate into vital organs due to their size, causing significant human health consequences. Besides, PM pollutants have been linked to respiratory conditions, genotoxic, mutagenic, and carcinogenic activity in human beings.

What is ultra fine dust?

Ultrafine particles (UFPs) are particulate matter of nanoscale size (less than 0.1 μm or 100 nm in diameter).

What is the size of fine particles?

The term fine particles, or particulate matter 2.5 (PM2.5), refers to tiny particles or droplets in the air that are two and one half microns or less in width.

How do you measure ultrafine particles?

Airborne UFPs can be measured using a condensation particle counter, in which particles are mixed with alcohol vapor and then cooled, allowing the vapor to condense around them, after which they are counted using a light scanner. UFPs are both manufactured and naturally occurring.

Does particulate matter stay in your lungs?

They generally enter the body through the lungs but translocate to essentially all organs. Compared to fine particles (PM2.5), they cause more pulmonary inflammation and are retained longer in the lung.

Why is Seoul Dusty?

Many South Koreans blame China for its pollution because of the spread of their yellow dust that is being produced by huge factories and coal-fired power plants. Fine dust particles from China together with domestic air pollutants contribute to the surge in the concentration of air pollutants in the Korean air.

What is yellow dust in Korea?

Yellow dust is yellow-colored dust originating from the dry deserts of China and Mongolia, or the Yellowstone zone of the Yellow river, that is whisked into the atmosphere by strong winds when the atmospheric pressure is low, and that is carried to South Korea and the surrounding regions through the air before slowly …

What is PM 2.5 in air quality?

Fine particulate matter (PM2.5) is an air pollutant that is a concern for people’s health when levels in air are high. PM2.5 are tiny particles in the air that reduce visibility and cause the air to appear hazy when levels are elevated.