Removal of Direct Red and Orange II Azo Dye from Synthetic Textile Water Using Electrochemically Produced Fe‐LDH

Layered double hydroxides are produced as an intermediate phase during in-situ electrochemical coagulation technique using iron sacrificial electrodes. Its structure consists of cationic layers, Fe(OH)(2)(n+), alternating with anionic layers stacked in a six-layer repeating sequence, giving rise to a hexagonal or pseudohexagonal symmetry. This Fe-LDH has the ability to trap organic impurities in the interlayers when it is mixed with wastewater. This hypothesis was verified using dye molecules, such as Direct Red and Orange II. Generally, textile industries use various kinds of chemicals including dyestuffs and pigments during dyeing and finishing processes. Their effluent is extremely toxic and environmentally hazardous. Fe-LDH was found to remove dye molecules with satisfactory efficiency. Optimum conditions were explored by changing current density, dye concentration, conductivity and pH during the LDH generation process. The floe was characterized using x-ray diffraction.