Common methods are:
Purification Method 1. The charge activated chloride: activated carbon adsorption air containing mercury, mercury chloride and mercuric chloride and generated.
Hg+Cl 2 →HgCl 2 ↓
The purification efficiency of this method can reach 99.9%.
2. Manganese dioxide absorption method: Natural pyrolusite can absorb mercury vapor strongly, and can also absorb fine mercury beads in full liquid.
MnO 2 +2Hg = Hg 2 MnO 2
Hg 2 MnO 2 can form mercury sulfate when sulfuric acid is present:
Hg 2 MnO 2 +4H 2 SO 4 +MnO 2 =2HgSO 4 +2MnSO 4 +4H 2 O
The absorption efficiency of pyrolusite can reach 95-99%. In addition, the mercury-containing waste gas can be purified by a water rinsing method.
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