| Environment-Cyanide, Thiocyanate and Nitrite treatment |
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Cyanide
Cyanide, one of the most toxic and fast-acting poisons known, and can pose serious threats to people and wildlife. However cyanide is widely used in industry and the discharge of cyanide wastes from mining operations and electroplating processes is increasingly attracting public and regulatory attention.See Section on Mining - Gold
Thiocyanates
In the mining industry, when alkaline cyanide comes into contact with sulphide minerals, i.e. as in the gold mining industry, the cyanide can be converted to thiocyanate. See section on Mining - Gold
Nitrite
In many cases, particularly in the case of effluent from hardening shops, electroplating plants etc. nitrite and cyanide co-exist in effluents. Nitrite is an undesirable component of a waste water as, being an easily oxidisable chemical, it adds to the Biological Oxygen Demand (BOD) of the waste water, causing oxygen depletion downstream of the discharge. In most circumstances nitrite discharge above 20mg/l level is prohibited.
Peroxygen Treatments
Peroxygens are widely used throughout industry for the safe and effective treatment of cyanide, thiocyanate and nitrite in process and waste waters. In addition to H2O2 other peroxygens such as Caro's acid and sodium percarbonate may also be employed.
For a more detailed discussion on this application of peroxygen technology please contact us
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