Abstract: A method of removing MTBE from an aqueous solution. A counter-current air stripper is employed in carrying out the present method configured in the form of a substantially cylindrical column having a top and a bottom, a substantially circular cross section and longitudinal axis. An inlet is provided for the aqueous solution containing MTBE proximate the top of the column and an inlet is provided for air proximate the bottom of the column such that the aqueous solution is caused to gravitationally travel within the column while the air moves upward in a counter-current fashion. The column is at least partially packed with open spherical balls having internal ribs.

Abstract: Solid waste contaminated with cationic metals is remediated with a composition that reduces the mobility of the metals. A recycled product is formed having improved structural properties for possible use as engineered fill such as road base material. Said composition comprising an emulsion of asphalt or tall oil pitch in water and a chemical fixing agent.