Abstract: The invention provides a method for removing a dissolved heavy metal from an aqueous solution. The method comprises dissolving in the aqueous solution a foaming agent of formula (I) or a salt thereof. The method further comprises passing a gas through the aqueous solution to form a foam and separating the foam from the aqueous solution.

Abstract: The invention provides a method for removing a dissolved heavy metal from an aqueous solution. The method comprises dissolving in the aqueous solution a foaming agent of formula (I) or a salt thereof. The method further comprises passing a gas through the aqueous solution to form a foam and separating the foam from the aqueous solution.

Abstract: A system and method for mounting an interactive technology device on one side of a surface that has a transparent portion. The system includes a flange bracket assembly and a mounting tray assembly to be secured under the surface, generally aligned with the transparent portion, with the flange bracket assembly and/or mounting tray assembly movable and/or pivotable to provide access to an interactive technology device positioned within the mounting tray assembly. The flange bracket assembly and mounting tray assembly protect the interactive technology device from environmental conditions and use of the interactive technology device does not interfere with the intended use of the surface. The method includes attaching a mounting system relative to the surface.