Laserfiche WebLink
• Appendix V <br />FORMULAS FOR NEUTRALIZING CYANIDE <br />The destruction of cyanide with chlorine.involves using 8 parts of CL2 to one part of NaCN. <br />The calcium hypochlorite that is used contains 65% available CL2. <br />Fora 1000 gallon spill containing. 2 pounds per ton cyanide, use 51 pounds of calcium <br />hypochlorite. <br />Some useful numbers: <br />One (1) gallon water weighs .00418 tons <br />One (1) ton water has 239.23 gallons <br />One (1) pound NaCN (not CN) requires: <br />3-1/4 gallons household bleach, <br />• 1-1/4 gallons commercial sodium hypochlorite, or <br />2-1/4 pounds dry calcium hypochlorite. <br />There are 100 pounds of calcium hypochlorite per container, therefore, one drum will treat 2000 <br />gallons. Exact measurement is not necessary, however, it would be better to over estimate. <br />Solutions must be dilute solutions. Recommendation is to treat a maximum 1% NaCN solution <br />with a maximum 1%hypochlorite solution, mixing slowly by adding 10% of hypochlorite every <br />1 to 3 minutes while stirring. <br />pH must be controlled to avoid cyanogen chloride release. <br />• Cyanide Emergency Response Plan September 25, 2006 <br />EMS: AGANA/CCV Doc.# E-012 <br />S:\4010-00055 CC & V l 12(d) Permit Application\ERP, SPCC, FMP\Cyanide Emergency Response.Plan.doc Revision 03 <br />- 17- <br />