Chicken Eggshell as a Potential Eco-friendly, Low-cost Sorbent: A Mini Review

Abstract

Water and soil are the basic needs of human being. Urbanization and industrialization activities are growing day by day, as we know mining, smelting, agriculture, and other industrial enterprises etc. are playing a vital role in any country’s economic growth. But these anthropogenic activities create a somber environmental pollution. For the sustainability of green environment, many studies have reviewed for the removal of toxic heavy metal i.e. ion exchange, reverse osmosis, chemical precipitation, flocculation, electrolysis, coagulation etc. however, these methods have several disadvantages such as unpredictable metal ion removal, toxic sludge generation, requirement of huge amount of reagents etc. Adsorption is a very easy, cost-effective process that has become a best-preferred technique for the removal of toxic heavy metal contamination in soil and water. Cost is the important factor for the selection of adsorbent material and the expense of individual adsorbent varies depending upon its local availability and the degree of processing. Several natural adsorbent materials are available in the world. This paper reviews the use of highly efficient, cheap and readily accessible kitchen waste eggshell. Eggshell is one of the most environmental friendly and cost effective sorbent, due to high CaCO₃ concentration, which helps to restrain heavy metals, fluoride, phenol, and petrol etc. from contaminated soil and water, due to its physiochemical properties eggshell has many applications in the field of bioremediation, material, and metallurgical sciences. This sorbent is being proved to be a more useful and environmental friendly.

Keywords: Adsorption, Anthropogenic, Eggshell, Heavy metals contamination, Low-cost sorbent.