| Autor: |
Boddu, Sumalatha, nagarjuna, Kondiboina, Jajula, Sandeep, Kumar, Vivek, Marri, Bhanu Prasad, Nagireddi, Srinu, Tondepu, Subbaiah |
| Zdroj: |
Journal of the Institution of Engineers (India): Series D; 20240101, Issue: Preprints p1-9, 9p |
| Abstrakt: |
The present research aims to investigate the degradation of Rhodamine B (RHB) in water by utilizing UV radiation in a specially designed photoreactor equipped with two 16-W Philips UV lamps. The study explores the influence of experimental parameters, which includes pH, photocatalyst dosage, and dye concentration on the degradation process. Silver (Ag) nanoparticles were utilized as the photocatalyst, and their synthesis associated a green approach, ensuring an eco-friendly nanoparticle production process. The characterization of the produced Ag nanoparticles was executed by various analytical methods, including Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) coupled energy dispersive X-ray spectroscopy (EDX) and X-ray diffraction (XRD). The degradation of RHB was analyzed using a UV–VIS spectrophotometer. The optimum conditions for RHB degradation were determined through systematic batch experiments. The results obtained from the analytical methods suggested valuable insights into the size, shape, and composition of the Ag nanoparticles. Notably, the maximum degradation of RHB was observed at a pH of 3 and a catalyst dosage of 3 g/L. The overall maximum degradation efficiency achieved was 93.56%, validating the efficacy of photodegradation using UV radiation and Ag nanoparticles under carefully controlled parameters. The optimization process further substantiated the accuracy and reliability of the proposed analytical methods. Furthermore, the experimental data were fitted with kinetic models. The degradation pathway followed second-order rate kinetics for the photocatalytic degradation of RHB with an excellent rate constant (k2= 2.44 × 10−2min−1). The overall investigation illustrates the attainment of substantial degree of degradation via photodegradation utilizing UV radiation and Ag nanoparticles emerges as a promising and viable approach for treating RHB contaminated water. |
| Databáze: |
Supplemental Index |
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