Reactive dye removal from textile wastewater using ferric coagulants

In this study, the removal of Reactive Red 195, a dye commonly present in textile wastewater, was investigated using Ferric Chloride (FeCl₃) and Ferric Sulfate Fe₂(SO₄)₃ are as coagulants. Jar tests were undertaken to evaluate the effectiveness of the optimal coagulant dose, optimal pH, and the optimal coagulant dose at the optimal system pH for maximum colour removal. FeCl₃ achieved a maximum removal efficiency of 99.9% at pH 12 using a coagulant dose of 1000 mg/L for an initial dye concentration of 50 mg/L. In contrast, Fe₂(SO₄)₃ reached a maximum removal efficiency of 90% at pH 11 with a higher coagulant dose of 3300 mg/L under the same dye concentration. These compounds are undoubtedly among the best options available for high-performance applications.