Comparison of various advanced oxidation processes and chemical treatment methods for COD and color removal from a polyester and acetate fiber dyeing effluent [An article from: Chemosphere]

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Description:
In this paper, a comparison of various advanced oxidation processes (O"3, O"3/UV, H"2O"2/UV, O"3/H"2O"2/UV, Fe^2^+/H"2O"2) and chemical treatment methods using Al"2(SO"4)"3.18H"2O, FeCl"3 and FeSO"4 for the chemical oxygen demand (COD) and color removal from a polyester and acetate fiber dyeing effluent is undertaken. Advanced oxidation processes (AOPs) showed a superior performance compared to conventional chemical treatment, which maximum achievable color and COD removal for the textile effluent used in this study was 50% and 60%, respectively. Although O"3/H"2O"2/UV combination among other AOPs methods studied in this paper was found to give the best result (99% removal for COD and 96% removal for color), use of Fe^2^+/H"2O"2 seems to show a satisfactory COD and color removal performance and to be economically more viable choice for the acetate and polyester fiber dyeing effluent on the basis of 90% removal.