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 | | Mercury waste management has become more complex as more mercury is collected from a greater variety of sources, including gas filtering products, sludges from the chlor-alkali industry, ashes, slags, and inert mineral residues, as well as used fluorescent tubes, batteries and other products that are often not recycled. |
 | | Mercury emissions due to trace contamination of raw materials or feedstocks such as in the cement, mining and metallurgical industries may be reduced by end-of-pipe controls, and sometimes by selecting a raw material or feedstock with lower trace contamination, if possible. |
 | | Mercury emissions from dental amalgams during cremation may only be reduced by removing the amalgams before cremation, which is not a common practice, or by filtering the gaseous emissions when the practice takes place in a crematorium. |
| www.chem.unep.ch /mercury/Report/Chapter8.htm (4512 words) |
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