Kinetic and thermodynamic evaluation of cod removal from pharmaceutical industry wastewater by Fenton oxidation

Organic material removal from bilge water by chemical treatment processes

“…Similar COD removal trend against ferrous concentration was observed in the previous studies [19], [20], [30], [31]. The optimum concentration of ferrous salt and COD removal efficiencies in the literature differed from 1 mg Fe 2+ L -1 to 4 g Fe 2+ L -1 and from 22.4 to 95%, respectively.…”

“…However, these changes were not different statistically (p > 0.05), so that the optimum H2O2 concentration was determined as 30 mM from the economical perspective. Argun [19] reported that COD removal efficiencies varied between 72 -79% in the range of 500-6000 mg L -1 H2O2. Regardless of H2O2 concentration, 87.6-92.1% of COD removal efficiency was obtained [32].…”

“…There is a good agreement with the previous study. Organic material removal from pharmaceutical industry by Fenton oxidation was studied and the optimum Fe 2+ /H2O2 was reported as1/5 [19].…”

“…In the economical perspective, coagulation-flocculation, and advanced oxidation process (Fenton oxidation) have presented alternative treatment methods for bilge water. Coagulationflocculation and Fenton oxidation are highly efficient processes for wastewater treatment, and they have been used to remove organic materials in many different industrial wastewaters such as cheese whey [16], pesticide [17], pulp and paper mills [18], pharmaceutical [19], dye [20] and leachate [21]. In coagulation, the negative surface charges on the colloidal suspended solids are neutralized with opposite charged ions by adding chemicals and the neutralized particles are formed flocs in flocculation [17].…”

Photocatalytic Oxidation and Heterogeneous Fenton Applications With Paper Industry Wastewater

“…In addition, two moles of hydroxyl radicals are formed as a result of photolysis of H2O2 by UV rays. The radicals formed undergo an oxidation reaction with the organic compounds in the environment and break down the organic compounds [14][15][16].…”