Photocatalytic Treatment of Spontaneous Effluent of Petrochemical Industries by TiO2 CTAB- Synthetic Nanoparticles
کد مقاله : 1287-IWWA
امین احمدپور *
عضو هییت علمی شرکت پژوهش و فناوری پتروشیمی
چکیده مقاله:
Removal of pollutants in petrochemical effluents is vital in terms of effluent control and achieving environmental standards. Because of the nature of particular effluents in petrochemical industry, direct biological treatment is not recommended. Therefore, novel techniques such as advanced oxidation processes through photocatalytic processes have been proposed for this purpose.. In this study, synthetic photocatalyst TiO2-CTAB (cetyletrimethylammoniumbromide) is used for treatment of a real spent-neutral effluent from a neutralization section of the olefin unit of a petrochemical company. In order to study the chemical oxygen demand (COD) of the process, a double-walled photoreactor is utilized pursuing the box-Bancon experiment design method. The results show that increasing the concentration of photocatalyst at neutral pH, up to an optimal value of 0.61 g/l in unrestricted conditions and 2g/l in restricted conditions, enhances COD removal by 91.3% and 90.7%, respectively. Furthermore, the effects of oxidation parameters, aeration rate, pH and the amount of catalyst loaded on COD removal efficiency are investigated. It is interpreted from the results that when the oxidant is at its lowest level, removal efficiency is reduced with increasing pH.
کلیدواژه ها:
Photocatalytic effluent treatment, Spontaneous caustic, Titanium dioxide, Experimental design, Chemical oxygen demand, CTAB nanoparticles
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