Abstract
This study was conducted to evaluate the COD removal efficiency of Photo-Fenton oxidation process. The reagents used in the Photo-Fenton process are catalyst Fe2+ and H2O2 as oxidizing agent. A 16W UV lamp was used to carry out the experiments. All the experiments were performed in batch mode to investigate the influence of operating conditions viz., Fenton reagents dosage, molar ratio and reaction time. The maximum COD removal observed was 68% under optimum operating conditions. The operating conditions H2O2/Fe2+ molar ratio = 3 and reaction time = 90 minutes were found to optimum. The dosages of Fenton reagents i.e. hydrogen peroxide and Fe2+ were optimum at 0.09 mol/L and 0.03 mol/L respectively.
Highlights
There is enormous generation of by-products due to the economic development and change in lifestyle
Landfilling is the widely adopted waste disposal method around the world [1]. This method of waste disposal gives rise to highly toxic wastewater known as leachate, which is a result of degradation of organic matter mixing with rainwater [2]
The hydroxyl ions generated by AOPs can oxidize the recalcitrant compound present in the landfill leachate [5]
Summary
There is enormous generation of by-products due to the economic development and change in lifestyle. They reported that hydrogen peroxide alone has negligible effect on the degradation whereas the COD removal efficiency increased by 36% with the addition of UV irradiation in to the system. In water or wastewater treatment, AOPs include Fenton and its combinations such as Photo-Fenton, E-Fenton, UV/H2O2, and O3/UV It has been reported by many researchers that AOPs have been used for degradation of COD, recalcitrant organic compounds, micro pollutants and colour and odour removal [7]. It has been reported that Photo-Fenton method is successfully adopted for removal of recalcitrant compounds from various types of wastewaters or in combination with biological technologies [8]
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