Inorganic waste gas absorbent and method for treating inorganic waste gas in air

The invention provides an inorganic waste gas absorbent and a method for treating inorganic waste gas in air. The inorganic waste gas absorbent is prepared from components in percentage by mass as follows: 10%-30% of a strong oxidant, 5%-30% of concentrated sulfuric acid, nitric acid, hydrochloric acid or sulfamic acid, 10%-30% of an ionic liquid and the balance of water. The invention further discloses the method for treating the inorganic waste gas. The method comprises steps as follows: the components are mixed proportionally, and an aqueous solution is obtained and mixed uniformly to be accommodated in a sealed container; air containing the inorganic waste gas is introduced into the sealed container in a concentrated manner and is discharged through a gas outlet pipe, and gas at an outlet is purified gas, and the purified gas is directly discharged indoors. The problem of non-ideal treatment effect on the inorganic waste gas in air conventionally can be solved.