REMOVAL OF REACTIVE YELLOW 145 COLOR AND REACTIVE RED COLOR 194 BY GUM EXTRACTED FROM MORINGA OLEIFERA SEEDS

Abstract

In this study, a biological coagulant (gum) extracted from moringa seeds is produced as a coagulant to treat Reactive Yellow 145 (RY145) and Reactive Red 194 (RR194). The material's properties are determined by scanning electron microscopy (SEM) and FTIR. SEM images show that the surface structure of the gum has the appearance of relatively fine pores and homogenously distributed gum particles on the surface. FTIR spectra indicate that the prepared material contains surface functional groups such as –OH, –HC=O and C-O of the xyloglucan ring. The factors affecting the coagulation process of RY145 and RR194 colors include pH, gum concentration, initial color, stirring speed, and stirring time. based on the results, it is suggested that the bio-flocculating agent (gum) prepared from moringa seeds, an eco-friendly material, can decolorize and reduce COD and, thus, is potential for the treatment of textile dyeing wastewater. The RY145 and COD removal efficiency was 87.77% and 76.92%, respectively, at optimal points of pH = 9, gum concentration (2000 mg/L), color concentration (40 mg/L), stirring speed (60 rpm)and time stirring (55 min). The RR194 and COD removal efficiency was 89.31% and 80%, respectively, at optimal points of pH = 7, gum concentration (3000 mg/L), color concentration (20 mg/L), stirring speed (45 rpm), and time stirring (65 min).