{HEAD ~ The present invention} relates to novel iron sulfides having excellent durability, processes for producing the same, iron sulfide mixture, a heavy metal treating agent containing either of these novel iron sulfides as an effective component, and {TAIL ~ a method} by which wastes containing various heavy metals are made harmless with the heavy metal treating agent 
relates to
{ HEAD ~ The present invention } relates to novel iron sulfides having excellent durability , processes for producing the same , iron sulfide mixture , a heavy metal treating agent containing either of these novel iron sulfides as an effective component , and { TAIL ~ a method } by which wastes containing various heavy metals are made harmless with the heavy metal treating agent
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH