Cesium Sulfide and InSnS-1 Trap Cesium Ions

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Radioactive cesium ions are very toxic to humans and can cause serious health problems. When exposed to cesium, people may experience nausea and vomiting, diarrhoea and bleeding. The amount of cesium that is absorbed by a person depends on how much they are exposed to and how long the exposure lasts.

When a radioactive cesium ion comes in contact with water, it is highly soluble and can enter the body through the gastrointestinal tract. Some of this ion is excreted through the urine and some stays in the bloodstream.

This ion is very dangerous for humans to come into contact with because of its toxicity and because it can damage cells. It can also lead to cancer.

Scientists have found a way to trap and contain cesium ions, which is a promising development for speeding up clean-up of nuclear waste. Kanatzidis, who is at the Department of Energy’s Argonne National Laboratory, and Ding, who is at Northwestern University, have fashioned a material that can trap cesium and other ions.

They found that the framework has rings of sulfur atoms that change shape when a cesium ion binds to them, sealing a hole in the rings and trapping the ion. This mechanism could be useful for radioactive cesium, which often gets into soils from contaminated air, as well as other elements like sodium, potassium and lithium.

InSnS-1 is a promising sulfide-based ion exchange material for the selective capture of Cs+ ions from acidic nuclear wastewaters, such as those from nuclear power plants. The ability of InSnS-1 to selectively capture Cs+ ions mainly originates from the extremely strong interactions between soft S2- of sulfide layers and relatively soft Cs+, the adjustable interlayer spacing, and structural flexibility.