Removal of Acid Red 27 (Amaranth Dye) from Synthetic Wastewater using Natural Coagulants

Abstract

A Physicochemical study for the treatment of synthetic dye wastewater was performed for the possible use of natural coagulants in the coagulation-flocculation method. The coagulation-flocculation method was used to treat aqueous solution containing varying concentrations of anionic dye. The effectiveness of this method was assessed using Chicken Bone Coagulant (CBC) and Bambara nut Shell Coagulant (BSC). The jar test method was used to measure the effects of pH, coagulant type, temperature and dosage on colour removal. The results showed that highest Acid Red 27 (AR27) removal efficiency for CBC is 94.7% at pH of 4 while that of BSC is 60.3% at settling time of 30 minutes. The results also showed that CBC is more efficient than BSC in the treatment of industrial textile wastewater sample.