Over 10 million tons of mollusc shells are produced each year, which have devastating effects on marine ecosystems. Our study aims to target the prominent clamshell waste issue by using clamshells to create enhanced zeolites which act as carbon sinks. We utilised clamshells from both Singapore and South Korea by conducting ion exchange with the Zeolite X material and the calcium chloride solution we obtained from dissolving the clamshells. We hypothesised that the zeolites that had gone through ion exchange would have superior gas absorption abilities compared to untreated zeolites. Using X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM) and Energy-Dispersive X-ray spectroscope (EDX), we were able to observe the structural and elemental composition of our zeolites, which supported our hypothesis where ion-exchanged zeolites surpasses untreated counterparts in gas absorption capacity. An Ion chromatography machine was also used to get an accurate representation of the calcium concentration in our samples. In conclusion, our study presents another purpose for clamshell waste, which can help alleviate environmental impacts, while also offering a sustainable solution for creating pollutant-absorbing materials, reducing the amount of clamshell waste in the process.