Sodium Cyanide

CAS RN: 143-33-9

Cleanup Methods

Waste cyanide salts from case hardening of steel are destroyed by reacting the salts at 650-700 deg C with waste ferric hydroxide sludges from various sources. /cyanide salts/
Environmental considerations - Land spill: Dig a pit, pond, lagoon, or holding area to contain liquid or solid material. /SRP: If time permits, pits, ponds, lagoons, soak holes, or holding areas should be sealed with an impermeable flexible membrane liner./ Cover solids with a plastic sheet to prevent dissolving in rain or fire fighting water. /Sodium cyanide, solid/
Environmental considerations - Land spill: Dig a pit, pond, lagoon, or holding area to contain liquid or solid material. /SRP: If time permits, pits, ponds, lagoons, soak holes, or holding areas should be sealed with an impermeable flexible membrane liner./ Dike surface flow using soil, sand bags, foamed polyurethane, or foamed concrete. Absorb bulk liquid with fly ash or cement powder. Cover solids with a plastic sheet to prevent dissolving in rain or fire fighting water. /Sodium cyanide solution/
Environmental considerations - Air spill: Apply water spray or mist to knock down vapors. Vapor knock down water is corrosive or toxic and should be diked for containment. /Sodium cyanide solution; sodium cyanide, solid/
Environmental considerations - Water spill: Add dilute caustic soda (sodium hydroxide). Add calcium hypochlorite ... Adjust pH to neutral (pH= 7). /Sodium cyanide solution; sodium cyanide, solid/
Spills of sodium cyanide ... solids may be shoveled carefully into containers, with care being taken that cyanide dust is not dispersed into the air. The residue after shoveling, or small spills, may be removed by dry vacuuming or flushing with a liberal quantity of water.
The electrodialysis through polyethylene membranes is used by the Legrand Copper Plating Co at Limoges, France to recover 3000 kg copper and 3400 kg sodium cyanide annually from wastewaters.
If cyanide is spilled ... 1. Ventilate area of spill. 2. Collect spilled material in the most convenient and safe manner for reclamation or for treatment in a cyanide disposal system.
Removal of copper, nickel, zinc, cadmium and cyanide from plating wastewater by electroflotation is discussed. /cyanides/
Keep water away from release. Avoid contact with dust, mist, or solution. Do not create dust. Prompt cleanup and removal are necessary. Shovel into suitable dry container. Control runoff and isolate discharged material for proper disposal.
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