One thing worth noting: "removed from solution" is not the same as "adsorbed."
The methodology in this study (and most sorbent-chemistry papers) measures contaminant disappearance from the test solution. The conclusion that the contaminant is now
bound to the rock surface is the conventional sorbent-chemistry framing, it's what activated carbon, zeolites, and clays do. It is the default mental model in the field.
But shungite is not activated carbon. It is a conductive carbon-mineral composite, and at least three separate Russian-and-Estonian research lines suggest the rock can
catalytically destroy contaminants on its surface, not merely store them:
Shungite tears apart heptyl
, Frumkin Institute of Physical Chemistry + 25th State Research Institute of the Russian Ministry of Defence + Fedorovsky All-Russian Institute of Mineral Resources, published in
Khimiya i Zhizn (Russian Academy of Sciences popular-science journal), 2006. Svetlana Golub's summary:
"Heptyl breaks down into its components, its molecule essentially tears itself apart." The shungite catalytically decomposes UDMH (asymmetric dimethylhydrazine, the Soviet space programme's most toxic rocket fuel) into methane, nitrogen, and water.
Shungite removes 90% of cesium and 97% of strontium...
, the Russian water-research literature explicitly contrasts shungite with activated carbon on this point:
"Shungite destroys organic and chlororganic compounds through its pronounced catalytic activity, which ordinary sorbents do not possess." The 30× advantage over activated carbon on dioxin removal was characterised at the Mendeleev University of Chemical Technology and the Military Medical Academy in Saint Petersburg.
The Estonian Academy ran the experiment with controls. The bacteria still died.
, University of Tartu, 2022. Common bacteria placed in shungite-treated water are killed under controlled experimental conditions. Bactericidal action is destruction, not adsorption.
So the more careful reading of any "shungite removes X" finding is:
X has disappeared from solution. Whether X is now stored on the rock surface (adsorbed) or has been broken into smaller molecules on the rock surface (catalytically destroyed) is a question most adsorption-framed studies don't actually test for. The methodology measures depletion of X in the supernatant, not the chemical state of what remains on the substrate.
For studies that have looked at what the rock surface actually does to the contaminant, the catalytic-destruction pattern keeps showing up.
