EXTRACTION METHOD OF HEXAVALENT CHROMIUM

摘要

PROBLEM TO BE SOLVED: To provide an extraction method of hexavalent chromium which is capable of attempting the safe use and abandonment of hexavalent chromium residual components and preventing the affects to environment pollution and human body by surely and inexpensively extracting toxic hexavalent chromium remaining in the surface or inner part of a chromium plating or chromate film without necessitating special and expensive equipment to prevent the elution of hexavalent chromium from a raw material to be treated.

SOLUTION: The method is to extract hexavalent chromium remaining in the raw material 3 to be treated. The raw material 3 to be treated having the film in which hexavalent chromium remains is allowed to contact with a liquid or particulate reducing agent 2. The hexavalent chromium is extracted from the film.

COPYRIGHT: (C)2007,JPO&INPIT