PROBLEM TO BE SOLVED: To provide a heavy metal treating agent with a little gas evolution of carbon disulfide or the like.

PURPOSE: A fire extinguishing composition for a solid aerosol fire extinguisher system and a preparation method thereof are provided to improve stability against external shocks or vibration. CONSTITUTION: A fire extinguishing composition for a solid aerosol fire extinguisher system comprises 60-90 wt% of potassium nitrate, 1-10 wt% of potassium permanganate, 1-10 wt% of flammable metal powder, and 5-25 wt% of epoxy resin. The flammable metal powder is selected from magnesium, aluminum, titanium...

PURPOSE: A fire extinguishing mixture and a using method thereof are provided to improve an fire extinguishing effect of water or fire extinguishing liquid by adding the mixture. CONSTITUTION: A fire extinguishing mixture contains 80-95wt% of yellow soil, 1-3wt% of limestone, 1-3wt% of sodium bicarbonate, 1-3wt% of enterolith, 1-3wt% of tin, 0.5-3wt% of charcoal, and 0.5-3wt% of flour. The particle size of the yellow soil and the limestone is 0.5-50 micrometers. The sodium bicarbonate is obtaine...

PROBLEM TO BE SOLVED: To provide a heavy metal treating agent using diethylenetriamine carbodithioate remarkably improved in lead insolubilizing ability in alkalinity and usable for treatment of alkaline heavy metal contaminants and for treatment of heavy metal contaminants with pH variation.

An agent and a method for purifying a medium contaminated with an organic chlorine compound are provided with which a medium, e.g., soil, groundwater, or bottom sediment, that has been contaminated with an organic chlorine compound can be purified in a short period and rapidly restored to the original environment, and which impose little burden on the environment. An anaerobic ingredient system to be used under anaerobic conditions which comprises solid milk, an acetic acid salt, Casamino acid, ...

PROBLEM TO BE SOLVED: To provide an apparatus for removing aromatic phosphate in waste oil and a system for treating waste oil containing PCB (Polychlorinated Biphenyl).