Investigation of Basalt Properties as Heterogeneous Catalyst for Fenton Oxidation of Textile Wastewater

Abstract

In this study, basalt is used as a catalyst for the removal of the dyes malachite green (MG) and crystal violet (CV) from aqueous solution. First, the effect of sintering temperature on Fenton process is optimized using basalt powder. Different analysis techniques such as X-ray diffraction (XRD), X-ray fluorescence (XRF), Brunauer-Emmett-Teller (BET), and Fourier-Transform Infrared Spectroscopy (FTIR) are used to characterize basalt powder. It is concluded that Fe 2 O 3 in basalt powder is the main component responsible for the degradation of dyes in the Fenton process. The maximum degradation of the dyes (97.02% for CV and 95.71% for MG) is obtained at 10 mg L −1 dye concentration, solution pH of 6, 1 g L −1 catalyst amount, and 12 mm H 2 O 2 concentration for 2 h. The results are fitted to the second-order kinetic model. The reusability of the catalyst is explored, and the basalt showed stability in the removal efficiency for repeated five cycles. The degradation of real textile wastewater is also studied. The removal efficiency reached up to 60.33% at optimum conditions of pH 2, basalt amount of 5 g L −1 , H 2 O 2 concentration of 400 mm. The results showed that the basalt powder is successfully utilized as a heterogeneous catalyst for textile wastewater treatment.

The effect of different types of AOPs supported by hydrogen peroxide on the decolorization of methylene blue and viscose fibers dyeing wastewater

“…Thus, the optimum Fe 2þ concentration was accepted 50 mg Fe 2þ /L or all AOPs methods. Saleh et al (2021) have noticed similar results for the Fenton oxidation of textile wastewater (Saleh et al 2021b). Dagher & colleagues (2018) degraded the methylene blue by Fenton process using Fe 3 O 4 as a catalyst.…”

“…Beyond that point, the addition of excess amounts of H 2 O 2 concentrations will has a negative effect due to the reactions in Equations ( 4) and ( 5) in which the oxidation mechanism is inhibited because of the ÁOH and HO 2 ˙radicals are consumed that are necessary for the degradation of MB dyes (Sennaoui et al 2018). In previous study, the excessive H 2 O 2 acts as hydroxyl radical scavenger and lowers the degradation efficiency for the textile wastewater (Saleh et al 2021b). Therefore, the amount of H 2 O 2 concentration should be adjusted to the optimum dosage which was 50 mg/L in our study.…”