What are the characteristics of ion exchange purification and recovery of cyanide-containing wastewater?

Ion exchange advantages: â‘ the cyanide and heavy metals can drop to very low levels; â‘¡ can be recovered and cyanide; â‘¢ sulfhydryl salt may be removed.

Its disadvantages: 1 desorption of sulfuric acid is large; 2HCN gas is dangerous, must be carefully sealed; 3 resin bed may be blocked by metal deposits; 4 investment costs are relatively high.
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