Adsorption of Basic Yellow 2 dye refers to the process by which the dye molecules are attracted and bound to the surface of a solid material, known as an adsorbent. This process is commonly used in wastewater treatment and the removal of dyes from aqueous solutions.

Basic Yellow 2 (also known as Auramine O) is a cationic dye, meaning it carries a positive charge. The adsorption of Basic Yellow 2 dye typically occurs through electrostatic interactions between the positively charged dye molecules and the negatively charged surface of the adsorbent material.

Various adsorbents can be used for the adsorption of Basic Yellow 2 dye, including activated carbon, clay minerals, zeolites, and certain types of nanoparticles. The choice of adsorbent depends on factors such as cost, availability, and the specific requirements of the application.

The adsorption process can be influenced by several factors, including the pH of the solution, temperature, contact time, concentration of the dye solution, and the surface area and porosity of the adsorbent material. Generally, higher concentrations of dye, longer contact times, and larger surface areas of the adsorbent favor greater dye adsorption.

The mechanism of adsorption involves the migration of dye molecules from the solution phase to the surface of the adsorbent. The positively charged dye molecules are attracted to the negatively charged sites on the adsorbent surface. Once adsorbed, the dye molecules form bonds or interactions with the adsorbent, leading to their immobilization.

The efficiency of Basic Yellow 2 dye adsorption can be evaluated through parameters such as dye removal percentage, adsorption capacity, and equilibrium isotherms. These parameters help determine the effectiveness of an adsorbent material for the removal of Basic Yellow 2 dye from solution.