There's very little that's environmentally-friendly about the asphalt used in roads and sidewalks across the country, but the U.S. Environmental Protection Agency is evaluating how to put it to use as ...

Air filtration, as we all know, is the process of separating dispersed particles from air by means of porous media. Filter fibers are expected to separate and retain particles on or within the filter ...

Oil filtration media have at least two layers in practice, but typically three or more. Porous filtration materials like cotton, polyester, and non-woven fiberglass fabrics segregate particles from a ...

Nisshin Seifun Group. has filed a patent for a photocatalytic filter comprising a porous metal substrate with a photocatalyst. The product of thickness and cell number ranges from 100 to 400. This ...