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Webinar

Can urban lands be used to absorb CO2?, online

Event organised by ICE

Date
09 November 2021
Time
18:15 - 19:30 GMT
Location
Online

This event has now ended

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Overview

The event focuses on discussing soil inorganic carbon sequestration as a tool for atmospheric CO2 removals. The talk highlights sustainable sourcing of aggregates required for inorganic carbon sequestration and suitable lands for implementation of the technique.
 

Summary

Research has shown that soils containing crushed concrete, brick demolition and basic igneous rocks can remove substantial amounts of CO2 from the atmosphere through the formation of soil carbonates. This is an innovative technique of extracting CO2 from atmosphere which takes into account both climate change on waste management.

The formation of soil carbonates, which are predominately composed of CaCO3, depends on two main factors: (i) the availability of calcium; and (ii) carbonate in solution. Calcium is naturally derived from the weathering of silicate minerals (plagioclase feldspars, pyroxenes etc.) that commonly occur in basic igneous rocks (for example basalts and dolerites), or from artificial calcium silicate and hydroxide minerals within concrete and cement.

Carbonate carbon is mainly derived ultimately from photosynthesis, based on stable isotope studies.

During the process, silicate minerals, in particular calcium silicates, react with dissolved CO2 to form carbonates. This leads to the removal of atmospheric CO2 and its subsequent storage in a stable, inorganic state.  Once formed within the substrate, this is a permanent store for CO2.

This webinar will start at 18:15.
To join, please click on the link below:
https://ice-org.webex.com/ice-org/onstage/g.php?MTID=e316d4919a17d01052b2b0372e7e59697

If prompted for a password, please enter scotevent
 

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