Box-Behnken studies on dye removal from water using chitosan and activated carbon adsorbents

摘要

The percentages of adsorption of Rhodamine 6G from water using both chitosan and activated carbon adsorbents: at three particle sizes (0.5, 0.75, and 1.0 mm), temperatures (30, 45, and 60 degreesC), and initial pH values (7, 8, and 9) were compared. The Box-Behnken design was applied in a second-degree quadratic polynomial regression model to test the effects and interactions of the variables using three-factorial experimental designs. The statistical analysis revealed that the second-degree quadratic model gave a good fit with an R-2-value of 0.9704 and 0.9989, and an F-value of 25.5 and 719.9 with chitosan and activated carbon, respectively. The significance for each variable on the adsorption of dye Rhodamine 6G was identified, and the optimal conditions for dye removal were obtained. [References: 28]