Removal of acidic Yellow Dye of wastewater by Moringa Peregrina
Abstract Industrial textile treatment is one of the most important and complex parts of wastewater treatment. Absorption is considered a desirable method in separating pollutants and dyes from water. In this study, the effectiveness of Moringa Peregrina seeds as a natural, non-toxic, and environment-friendly adsorbent in the treatment of colored wastewater has been investigated. First, the isotherm model and absorption kinetics were investigated, and then influential variables such as major and minor factors in the absorption process were identified. During the experiment, the amount of dye removal efficiency was measured by a spectrophotometer. Optimization of three important factors including color concentration, pH, and adsorbent dosage was done using the design of the composite central method, the response surface in the Design-Expert software. The optimal model for describing the adsorption process, the Freundlich and the pseudo-second-order model are obtained as a result and the adsorption capacity of moringa peregrina is 22.85 mg / g. In the end, code 19 acidic yellow dye with a concentration of 250 mg/L, pH = 8, and adsorbent in the amount of 0.875 g was purified to 80% of an aqueous solution. The results were obtained under constant conditions with a mixing speed of 200 rpm and a duration of 60 minutes with a reliability of 0.93. According to the test results, on average, Moringa Peregrina is effective in removing pigments from aqueous solutions under the mentioned conditions.