Photocatalytic Treatment of a Synthetic Wastewater

5th Annual International Conference on Material Science and Environmental Engineering

材料科学;生态环境科学

Yerkinova, Azat^1 ; Balbayeva, Gaukhar^1 ; Inglezakis, Vassilis J.^1 ; Poulopoulos, Stavros G.^1

School of Engineering, Chemical Engineering Department, Environmental Science and Technology Group (ESTg), Nazarbayev University, 53 Kabanbay Batyr Ave., Astana

010000, Kazakhstan^1

关键词: HPLC analysis;    Phenol conversion;    Photocatalytic treatment;    Photoreactors;    Synthetic waste water;    TiO2 catalyst;    Total carbon;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/301/1/012143/pdf
DOI  :  10.1088/1757-899X/301/1/012143

来源: IOP

【 摘 要 】

This work aimed at investigating the photocatalytic treatment of a synthetic wastewater using UV light (254 nm, 6 W), TiO2catalyst and H2O2 in a batch recycle annular photoreactor. The total volume of the solution was 250 mL while the irradiated volume in the annular photoreactor with 55.8 mL. Each experiment lasted 120 min and samples were sent for Total Carbon and HPLC analysis. The stock wastewater had initial total carbon 1118 mg L-1. The effect of the presence of phenol in the wastewater on total carbon (TC) removal was also studied. It was shown that the photocatalytic treatment was effective only when initial TC was decreased to 32 mg L-1, whereas the optimum TiO2concentration was 0.5 g L-1, leading to a TC removal up to 56%. For the same initial carbon load, the optimum H2O2concentration was found to be 67 mg L-1resulting in 55% TC removal. Combining, however, TiO2and H2O2did not lead to better performance, as 51% TC removal was observed. In contrast, when initial carbon in the wastewater was partially substituted by phenol, the combination of catalyst and hydrogen peroxide was beneficial. Specifically, when 10 ppm of phenol were added keeping the same initial TC concentration, UV/TiO2treatment resulted in 46% TC removal and 98% phenol conversion, whereas using additionally H2O2led to 100% phenol conversion after 45 minutes and 81% TC removal.