Özet:

The quality of the in-situ pretreated real textile wastewater was improved by a hybrid treatment process comprising of the sequential applications of the electrocoagulation, adsorption and photo Fenton like oxidation processes. Under the most suitable electrocoagulation conditions 19.5% total organic carbon (TOC) removal was accomplished. The textile wastewater was subjected to adsorption after electrocoagulation. Graphene oxide adsorbents were prepared from corncob (C-GO) was used as the adsorbent in the adsorption process. The effect of the adsorbent loading and the initial pH were investigated to determine the most suitable adsorption conditions. At 2 g/L of adsorbent loading and pH 5, 40.3% cumulative TOC removal was achieved. After the adsorption photo Fenton like oxidation was applied as the third treatment step in the presence of BiFeO3/C-GO and BiNiO3/C-GO catalysts. The TOC removal performances of the catalysts were compared at 0.25 and 0.5 g/L of catalyst loading. After the photo Fenton like oxidation the highest cumulative TOC removal was evaluated as 51% in the presence of BiNiO3/C-GO catalysts. The use of biomass-derived graphene oxide as adsorbent and catalyst support material for textile wastewater removal in a sequential treatment system consisting of electrocoagulation, adsorption and photo-Fenton-like oxidation constitutes the main originality of this study.

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