A New Approach for Dye Removal with a Polymer: Removal of Acid Orange 12 from Aqueous Solution with Shrimp Chitin

Chitin, a naturally abundant mucopolysaccharide, is the supporting material of crustaceans, insects, and etc. Chitin and its main derivative chitosan have various applications in medicine, pharmacy, biotechnology, environment, and food engineering because of their nontoxicity, biodegradability, biocompatibility, antimicrobial, and antioxidant properties. Here, research was conducted on the removal of Acid Orange 12, which is among the most used azo dyes in textiles, from aqueous solutions using shrimp chitin, a polymer. To determine the most suitable conditions, different parameters (pH degrees, amount of chitin, amount of dye, contact time) were studied. Chitin was determined to be the most efficient in removing Acid Orange 12 using pH 5 conditions. The adsorption of dye onto chitin followed the Langmuir isotherm and pseudo-second-order kinetic model.