A pavement coating tested in the Netherlands could reduce air pollution almost half, claims a paper in the Journal of Hazardous Materials.
Tested over the course of a year on a block in Hengelo, Netherlands, concrete blocks covered with a titanium oxide coating removed an average of 19 percent of pollution from NO and NO2 over the course of a day, up to 45 percent during ideal weather conditions--days with low humidity and high radiation.
The photocatalytic paving stones are more expensive than regular concrete, but could help reduce the concentration of smog in urban areas. Photocatalytic cement is already being used on one busy stretch of sidewalk in Chicago.
Good. I could only imagine how much this would help cities like Beijing.
Breathing clearer is always good.
I am not quite understanding this. It sounds great but what is happening to this Nitrogen oxide/ dioxide. Is it being absorbed into the pavement and if so how much can it absorb. Or is then releasing it into the air again but in a different form or in the ground. If so then what does it leave as?
It pulls oxygen off other molecules in the air and then the oxygen bonds with the NO or NO2 to produce the safer nitrate, NO3.
this definitely needs to be implemented onto every sidewalk; preferably sooner than later!!