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Abstract
The article explores the photocatalytic removal of BTEXS, a group of harmful volatile organic compounds, in aqueous solutions. It introduces a green synthesis method to create an ALV-TiO2/Co-MCM-41 nanocomposite, which effectively degrades BTEXS under visible light. The study delves into the characterization of the nanocomposite, optimization of photocatalytic conditions, and the mechanism of degradation. Notably, the research demonstrates the high efficiency and stability of the nanocomposite, making it a promising solution for industrial wastewater treatment.
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Abstract
Industrial wastewater containing benzene, toluene, ethylbenzene, xylene, and styrene (BTEXS) poses serious risks to soil, water, air, and especially people due to their hazardous contents. Therefore, it is crucial to remove it from wastewater that has been tainted by this kind of pollutant. Photocatalytic performance was examined when removing BTEXS from an Aloe vera-titanium oxide nanocomposite (ALV-TiO2) that had three different percentages doped on a Co-MCM-41 nanocatalyst. Nanocomposite structures were characterized by FTIR, XRD, zeta potential, XRF, N2 adsorption-desorption, EDX, FESEM, and TEM measurement. A laboratory-scale double-walled reactor was used for all experiments. At pH 11, the reaction time of 90 min, the total concentration of BTEXS cyclic hydrocarbon solution of 250 mg/L, and the nanocomposite dose of 1.0 g, optimal results were obtained. Surprisingly, the findings demonstrate a relationship between the addition of more ALV-TiO2 nanocomposite and the photocatalytic performance of the nanocomposite. Under ideal circumstances, 89.18% of the cyclic hydrocarbons in industrial wastewater samples were removed. Also, their reusability was evaluated, it was observed that the particles were reusable in five cycles, and a 5% reduction in their degradation efficiency was observed. The appropriate dosages of photocatalytic nanocomposite for a variety of other real-world applications can be directly guided by this study.
Graphical abstract
Schematic of green synthesis of ALV-TiO2/Co-MCM-41 nanocomposite using doping method
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