The process of bioremediation entails altering the surrounding environment to promote the development of microorganisms that degrade the intended contaminants in a polluted medium, such as soil, water, or subsurface material. The environment's concentration of heavy metals is influenced by anthropogenic or natural factors. Industries, electronic trash, and ore mining are examples of anthropogenic activities which lead to contamination of heavy metals like cadmium, chromium, lead, mercury, thorium, and uranium that cannot be biodegraded. Bioremediation procedures, on the other hand, have the potential to minimize the mobility of these materials in the subsurface, hence lowering the risk of environmental exposure. Due to runoff, heavy metals from these causes are mostly prevalent in water sources, where they are absorbed by marine fauna and plants which leads to ecological and biological disarrays.

Keywords : Bioremediation, Crab Shell.