HEAVY METAL FIXING AGENT AND STABILITY IMPROVEMENT METHOD FOR HEAVY METAL FIXING AGENT

摘要

PROBLEM TO BE SOLVED: To provide a heavy metal fixing agent which can prevent elution of heavy metals by fixing the heavy metals in a heavy metal-containing matter and which generates a smaller amount of poisonous gases to provide safety and good work efficiency while dithiocarbamic acid (salt) which has been known heretofore as an fixing agent of heavy metals present in solid powder or slurry, and its aqueous solution in particular sometimes generate poisonous gases such as hydrogen sulfide and carbon disulfide when stored, transported and used. SOLUTION: The heavy metal fixing agent consists of dithiocarbamic acid and /or its salt and an iron compound. COPYRIGHT: (C)2005,JPO&NCIPI