A method for treating an industrial gas stream that includes acid gases includes contacting the industrial gas stream with an aqueous liquid absorption medium in a gas/liquid absorber. The aqueous liquid absorption medium includes at least a tertiary alkanolamine having the General Formula (I) in an amount for 10 wt % to 90 wt % and water in an amount from 10 wt % to 90 wt %, based on a total weight of the aqueous liquid absorption medium.