| 摘要 |
A composition for separating out volatile pollutants from gases and exhaust gases comprising calcium hydroxide and water-soluble salts of sulfur-containing compounds, e.g., mercaptans, sulfides, polysulfides, polythionates and thiosulfates or elementary sulfur which are used in combination with surfaceactive substances. Possible ways to produce the composition include adding the sulfur-containing compounds to quicklime during slaking, to the slaking water or, subsequent to slaking, to calcium hydroxide. The compositions are used for removing the volatile heavy metals, particularly mercury, arsenic, cadmium, thallium, antimony and lead, at temperatures ranging from 0 .degree. C to 400 .degree. C. For this purpose, the composition is blown as powder into the exhaust gas stream, and the resultant products are separated out at fabric filters. Upon addition of surface-active substances, volatile organic pollutants are removed simultaneously with the afore-mentioned inorganic pollutants.
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