Removal of cationic dyes from a synthetic effluent using a calcium surfactant

Abstract The present study aimed to evaluate the removal efficiency of two types cationic dyes different classes – methylene blue (MB) and malachite green (MG) from a synthetic effluent using calcium surfactant (CaSF) originated used frying soybean oil. Fourier Transform Infrared Spectroscopy (FTIR) spectra showed that functional groups on surface CaSF can form complexes or bonds with dye molecules and, consequently, promote their adsorption. adsorption kinetics studies indicated equilibrium point process is reached in 90 min for both dyes. Equilibrium isotherm models best fit MB MG were Langmuir Dubinin–Radushkevich models, respectively. maximum capacities MG, according model, 199 123 mg·g−1, In sight high (84 100%, respectively), use an excellent alternative treatment effluents contaminated by adsorption–desorption cycle maintains good up three cycles.