Method for treating contaminants on a site, especially a deep well site includes delivering a first stream of a first gas to a first port of a laminar microporous diffuser and delivering a second stream of a second gas to a second port of the laminar microporous diffuser to effect mixing of the first and second streams of gases within the laminar microporous diffuser. The quaternary chalcogenides are useful as the absorber layer as a p-type semiconductor in a thin film solar cell application. The first electrode is located on the substrate, and the isolation layer is located on the epitaxy structure adjacent to the first electrode. A plurality of extension wings are respectively disposed at preset locations of the outer ends of the centrifugal blades.