Particulate Matter (PM2.5) Mega Guide

In this article, you will find information about everything related to particulate matter. I will focus on PM2.5 as I believe it is the most universal indicator of air quality. Almost all scientific studies concentrate their attention to PM2.5 because there is a substantial availability of monitors/sensors. Some extracts were taken from my book See The Air – PROOF THAT AIR POLLUTION KILLS.

1) What is PM2.5?

Scientific explanation: PM2.5 is a mass concentration on basis of a separation curve, where the 50% value is at 2.5μm aerodynamic diameter. More precisely, the weighting function is much steeper (100% weighting <0.5μm, to 0% weighting> 3.5μm and 50% weighting at approximately 2.5μm). PM2.5 pollution can only be seen with an electron microscope.

Plain English explanation: PM2.5 referees to fine particles with a size of or less than 2.5μm (aka micron). By the way, soot, aerosols, dust, BC are other common terms to call particle pollution.

2) What is PM2.5 made of?

It is hard to determine a specific chemical composition, however, here is a list of all the chemicals that might be found in a single particle. Polycyclic aromatic hydrocarbons (naphthalene, acenaphthylene acenaphthene, fluorene, phenanthrene, anthracene, fluoranthene, pyrene, benzo(a)anthracene, chrysene, benzo(b)fluoranthene, benzo(k)fluoranthene, benzo(a) pyrene, dibenzo(a,h)anthracene, benzo(g,h,i)perylene, and indene), metals (Al, Si, P, S, CI, K, Ti, Cr, Mn, Fe, Ni, Cu, Zn, Pb, Ca), others.

Read More »

Review: AIRINUM Lite Air Mask

It has been a long time since I reviewed a face mask. This mask review is all about how to protect yourself from ambient air pollution while commuting rather than from Covid-19. The mask can protect you from COVID because it is KN95 certified, which is similar to FFP2 and N95, but as most people use simple disposable surgical masks for their low price, I won’t focus on it. For this review, I decided to focus on air pollution which is a more severe threat in my opinion. Keep in mind, cheap surgical masks are useless and they pollute a lot more than they protect as they are thrown all around us by most people. We all have seen them flying around or on the ground or inside the sea. I am against disposable masks.

The AIRINUM Lite Air Mask offers great protection from particulate matter but also a modern and young style. I have been wearing the Aurora Blue for three weeks already and I am impressed by its performance.

Read More »