Eggshells Can Combat Global Warming! Did You Know That?


A research team from University of Calcutta under Basab Chaudhuri has discovered that eggshells contain the material that could be of help in the Carbon capture and sequestration (CCS) process. This process refers to the way of fighting global warming through the process of removing carbon from the atmosphere and thereby driving it away using carbon soaking materials.

The University of Calcutta team’s research appears this month in the International Journal of Global Warming. Researchers have demonstrated that the eggshell membrane has the capacity to absorb almost seven times its own weight of carbon dioxide from the atmosphere, says a report.

The membrane, which is about 100 micrometers thick, is just below the shell. A weak acid can be used to separate it from the shell for use as a carbon dioxide adsorbent.

The whole structure of an eggshell comprises three layers such as a cuticle on the outer surface, and a spongy calcium-containing middle layer and inner layer. The second and third layers are composed of protein fibers bonded to calcium carbonate. (see the source link here)

This calcium carbonate is a chemical compound that results from another carbon sequestration technology which is also developed in India using naturally occurring bacteria.

They say that thus captured gas could be stored until environment-friendly methods of disposing of can be found. They even hope that they can even find new ways to use the thus stored gas.

But separating the membrane from the cuticle is not an efficient process. India alone consumes 1.6 million metric tons of eggs each year and global egg consumption expected to reach about 1,154 billion by 2015, which indicates that researchers will definitely find methods to ensure the conduction of the process at industrial scale.

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