Utilisation of eggshell membrane as an adsorbent for carbon dioxide

Carbon dioxide (CO2) is a major greenhouse gas responsible for global warming. This work aims to explore a cheap and easy way for CO2 adsorption from the atmosphere, by using an eggshell membrane. Eggshell membrane could be used upto four times with intermediate regeneration with acetic acid solution. Atomic absorption spectrophotometer (AAS) analysed the amount of CO2 adsorbed as equivalent calcium (Ca) present in calcium carbonate (CaCO3). An average of 6824 mg CO2 could be adsorbed per g of eggshell membrane. Scanning electron micrograph (SEM) was used to analyse the surface morphology of the fresh and regenerated eggshell membrane.