Air polluted with wildfire smoke can harm animals, too

The Canadian wildfires that are burning out of control have brought hazy skies and polluted air to parts of the United States unprepared for it—and that's affecting not just the people, but their pets and livestock, too.

Burning membranes for molecular sieving

A robust nanofiltration membrane that acts as a highly effective molecular sieve can avoid many of the problems with current polymer membranes.

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Filtration is commonly the mechanical or physical operation which is used for the separation of solids from fluids (liquids or gases) by interposing a medium through which only the fluid can pass. Oversize solids in the fluid are retained, but the separation is not complete; solids will be contaminated with some fluid and filtrate will contain fine particles (depending on the pore size and filter thickness). Filtration is also used to describe some biological processes, especially in water treatment and sewage treatment in which undesirable constituents are removed by adsorption into a biological film grown on or in the filter medium.

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