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Letter 9091
HCN gas production with chlorine
addition
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I am trying to develop a small scale system to reduce levels of
cyanide in waste water from ~200 ppb to less than 50 ppb. I have
found in my research that chlorine addition to remove cyanide, if not
akaline, can produce HCN gas.
My questions: is a 200 ppb level in the water a concern for gas
cyanide gas production? Do other processes such as aeration cause
this release of HCN gas or is it limited to chlorine?
Thanks,
Matt Vick
- Marion, Illinois, USA
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