Sharma and Kaur (2011) highlighted that the pH value of the solution is a crucial factor in adsorption studies. They adjusted the pH between 1 and 9, using a digital pH meter (Model LT-10) for measurements. They found that adsorption increases with pH, likely because the adsorbent surface becomes negatively charged at higher pH values, which promotes the adsorption of positively charged methylene blue cations via electrostatic attraction. Although Evans Blue (EB), an anionic dye, still