According to a new study by the Hong Kong University of Science and Technology (HKUST), CO2 in the deep Earth may be more active than previously believed and could have played a bigger role in climate change than previously thought. The research, led by Professor Pan Ding, analyzed the dissoluti
Left: the solution is confined by graphene. Right: the solution is confined by stishovite . The white, grey, red, and pink balls are the hydrogen, carbon, oxygen, and silicon atoms, respectively. Credit: HKUSTin the deep Earth may be more active than previously believed and could have played a bigger role in climate change than previously thought.
The vast majority of the Earth’s carbon is buried in its interior. That deep carbon influences the form and concentration of carbon near the surface, which can in turn impact global climate over geologic time. It is therefore important to assess how much carbon lies in deep reservoirs hundreds of kilometers underground.
“It is an important step forward to understand the unusual physical and chemical properties of aqueous COPrevious studies focused on properties of dissolved carbon in bulk solutions. But in deep Earth or underground carbon storage, aqueous solutions are often confined to the nanoscale in pores, grain boundaries, and fractures of Earth’s materials, where spatial confinement and interface chemistry may make the solutions fundamentally different.
Professor Pan is an associate professor of physics and chemistry at the university. The team also comprises doctoral students Nore Stolte and Rui Hou.
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