bioadsorbents
Bioadsorbents are adsorbent materials derived from biological sources or biomass that remove contaminants from liquids or gases by adsorption. They include raw or modified agricultural wastes (rice husk, banana peel), microbial biomass, algal biomass, and biopolymers such as chitosan, cellulose, and lignin, as well as biochars produced from biomass.
In water treatment, bioadsorbents target heavy metals (lead, cadmium, arsenic), dyes, phosphates, and various organic compounds.
Adsorption mechanisms rely on surface functional groups, porosity, and the interaction between pollutant molecules and the
Advantages include renewability, valorization of waste, and potential low cost. Challenges include variable feedstock composition, limited
Examples of bioadsorbents are chitosan beads and films, alginate composites, cellulose-based powders, lignin-derived adsorbents, and activated