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Sustainable Mercury Waste Storage in Bedrock: Swedish Solution

Learn about Sweden's innovative underground storage solution for mercury waste, relying on bedrock's natural properties. Discover the benefits, requirements, and recommendations for safely storing waste with high mercury content in bedrock facilities.

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Sustainable Mercury Waste Storage in Bedrock: Swedish Solution

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  1. Underground storage in bedrock – the Swedish solution for mercury waste Björn Södermark Swedish Environmental Protection Agency

  2. Terminal storage in bedrock is the best solution • Rely on the capabilities of nature to withstand its own forces and those of man • Supplement with technical measures

  3. Fundamental properties of the surrounding bedrock Prevention and remediation: • A stable physical and chemical environment and low groundwater flows • Long transport paths; high capacity for sorption, matrix diffusion and dilution No supervision and maintenance needed

  4. Recommendations • Waste containing more than 1 per cent mercury should be terminally stored in bedrock • The mercury in the waste should be extracted and converted to an insoluble form • The storage facility should be located at least 400 m below ground in granite bedrock, preferably adjacent to an existing mine • The waste owners have the responsibility for building and running a storage facility

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