biosorbent

A biosorbent is a solid material of biological origin that can adsorb (bind to its surface) and accumulate specific substances from a liquid or gas phase. This process of biosorption is a type of passive adsorption, meaning it does not require energy input from the biosorbent itself. Biosorbents are typically waste materials or byproducts from various industries, making them an economically attractive and environmentally friendly option for remediation and separation technologies.

The effectiveness of a biosorbent depends on its surface properties, such as the presence of functional groups like carboxyl, hydroxyl, amino, and phosphate groups, which can interact with the target pollutants through various mechanisms including electrostatic attraction, complexation, and ion exchange. Common sources of biosorbents include agricultural wastes like fruit peels, husks, and seeds, as well as microbial biomass such as bacteria, fungi, and algae.

Biosorbents are primarily employed in environmental applications, particularly for the removal of heavy metals, dyes, and other organic pollutants from wastewater. They are also explored for applications in areas like water purification, gas treatment, and the recovery of valuable ions. The advantages of using biosorbents include their low cost, abundance, biodegradability, and the potential for regeneration and reuse, contributing to sustainable practices.