Method for removing nitrogen oxide

摘要

The invention relates to a method and apparatus for removing nitrogen oxide from gas (exhaust gas) discharged, for example, in the steps of plating, washing with acids, dissolution, etc. The removing method comprises making a liquid capable of absorbing and removing nitrogen oxide adhered onto the surfaces of glass fibers followed by making a gas containing nitrogen oxide brought into contact with said glass fibers while making said nitrogen oxide absorbed by the liquid adhered onto the surfaces of said glass fibers to thereby remove said nitrogen oxide from said gas. According to this method, since a gas containing nitrogen oxide is brought into contact with a liquid capable of absorbing and removing nitrogen oxide from the gas, that has adhered on the surfaces of glass fibers, the nitrogen oxide is efficiently absorbed by said liquid and is therefore efficiently removed from said gas.