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Elemental Mercury Capture from Industrial Gas Emissions Using Sulfides and Selenides: a Review by Liu, Dongjing; Li, Bin; Wu, Jiang; Liu, Yangxian is a Environmental Science article available to read on EtoBox.

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Mercury emission from industrial activities has become a major environmental health concern, because mercury is one of the most toxic metals encountered in the environment. Elemental mercury is the dominant Hg species in gas streams. Adsorption is regarded as a practical technique for Hg 0 removal, for which developing efficient and economic adsorbents are needed. Chalcogenides have recently gained increasing research interest owing to their high binding affinity for Hg 0 . Chalcogen-based adsorbents include S-modified adsorbents, H 2 S-and SO 2 -activated adsorbents, polysulfide chalcogels, mineral sulfides and metal selenides. This article reviews chalcogen-based adsorbents for Hg 0 capture from gas streams, with focus on removal performances, mechanisms, advantages and disadvantages. Results show that S modification, and H 2 S and SO 2 activation generate a great variety of active sulfur species on the adsorbent surface, resulting in enhanced Hg 0 removal activity. Sulfur species include elemental sulfur, sulfide, thiophene and sulfate. Nonetheless, removal efficiency decreases to some extent due to the presence of acidic flue gas components and steam. On the other hand, mineral

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Author

Liu, Dongjing; Li, Bin; Wu, Jiang; Liu, Yangxian

Publisher

Springer-Verlag; Springer Verlag; Springer Science and Business Media LLC; Society for Mining, Metallurgy and Exploration Inc. (ISSN 1610-3653)

Published

2020

Language

EN

Field

Environmental Science (Physical Sciences)