Experimental investigation on ZnO-Fenton as solar photocatalyst to treat the oilfield produced water by response surface methodology.

Petroleum Industries are producing huge amount of waste with wastewater more than 80% of liquid waste and as high as 95% in ageing oilfields. In the current study, the performance of solar photo-catalyst of ZnO in the AOP on degradation of TOC and COD from PDO Oilfield produced water in Oman was investigated. Multilayer thin films coated on the glass ring by alternate adsorption of chitosan and the photo catalyst solution of ZnO by dip coating technique (L-b-L). The coated glass was scanned using SEM and DLS. A sequence of experiments of batch reactor were supported out throughout the experimental study. CCD was used for the experiment to enhance the parameters of experiment and evaluate the relation among four major important independent variables on ZnO dosage, H2O2, Fe+2 dosage, pH and reaction time. The overall performance was evaluated by analyzing the removal efficiencies of COD and TOC. It was observed that the optimum % COD reduction 93.56 % & %TOC degradation was approximately 80%. Maximum TOC and COD removal efficiencies for model response and confirmation experiments under optimal conditions (ZnO dosage (0.83 g/L), H2O2 dosage (1.62 g/L), Fe+2 dosage (0.2 g/L), pH (3.11) and RT (178.78 min) respectively). Thus, the ability of solar photocatalysis of ZnO/Fenton in pretreatment water of oil filed. [ABSTRACT FROM AUTHOR]