Fundamental of Advanced Oxidation Processes

Jain, Pallavi; Singh, Prashant; Singh, Madhur Babu

doi:10.1007/978-981-19-0987-0_1

Cited by 2 publications

(2 citation statements)

References 78 publications

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“…When the MNBs burst, the gas-liquid interface promotes the chemical reactions, leading to a drastic change and stimulation of the production of reactive oxygen species (ROS) such as hydrogen peroxide (H2O2), radical anion superoxide ( − •O2), and hydroxyl radicals (•OH), which have high oxidizing power [59]. Hence, in oxidizing conditions, •OH may facilitate changes in the oxidative states of metal ions [60,61]. In this case, As(III) and Fe(II) could undergo oxidation to form As(V), and Fe(III), ultimately leading to generation of bioscorodite.…”

Section: Discussionmentioning

confidence: 99%

Effect of Micro-Nanobubbles on Arsenic Removal by Trichoderma atroviride for Bioscorodite Generation

Morales-Mendoza,

Flores-Trujillo,

Ramírez-Castillo

et al. 2023

JoF

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The global environmental issue of arsenic (As) contamination in drinking water is a significant problem that requires attention. Therefore, the aim of this research was to address the application of a sustainable methodology for arsenic removal through mycoremediation aerated with micro-nanobubbles (MNBs), leading to bioscorodite (FeAsO4·2H2O) generation. To achieve this, the fungus Trichoderma atroviride was cultivated in a medium amended with 1 g/L of As(III) and 8.5 g/L of Fe(II) salts at 28 °C for 5 days in a tubular reactor equipped with an air MNBs diffuser (TR-MNBs). A control was performed using shaking flasks (SF) at 120 rpm. A reaction was conducted at 92 °C for 32 h for bioscorodite synthesis, followed by further characterization of crystals through Fourier–Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), and X-ray diffraction (XRD) analyses. At the end of the fungal growth in the TR-MNBs, the pH decreased to 2.7–3.0, and the oxidation-reduction potential (ORP) reached a value of 306 mV at 5 days. Arsenic decreased by 70%, attributed to possible adsorption through rapid complexation of oxidized As(V) with the exchangeable ferrihydrite ((Fe(III))4-5(OH,O)12), sites, and the fungal biomass. This mineral might be produced under oxidizing and acidic conditions, with a high iron concentration (As:Fe molar ratio = 0.14). The crystals produced in the reaction using the TR-MNBs culture broth and characterized by SEM, XRD, and FTIR revealed the morphology, pattern, and As-O-Fe vibration bands typical of bioscorodite and römerite (Fe(II)(Fe(III))2(SO4)4·14H2O). Arsenic reduction in SF was 30%, with slight characteristics of bioscorodite. Consequently, further research should include integrating the TR-MNBs system into a pilot plant for arsenic removal from contaminated water.

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Section: Discussionmentioning

confidence: 99%

Effect of Micro-Nanobubbles on Arsenic Removal by Trichoderma atroviride for Bioscorodite Generation

Morales-Mendoza,

Flores-Trujillo,

Ramírez-Castillo

et al. 2023

JoF

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“…Among the alternatives for the elimination of these dyes from water are advanced oxidation processes (Jain et al, 2022) whose degradation mechanism is based on the formation of hydroxyl radicals, however, the activity of these radicals is limited in complex environmental matrices (Brienza and Katsoyiannis, 2017) such as wastewater. Another alternative is the degradation of dyes using bacteria based on enzymatic activity by means of oxidases and azoreductases (Jamee and Siddique, 2019) and have proven to be effective at laboratory scale and their application to real conditions is still limited (Moyo et al, 2022).…”

Section: Introductionmentioning

confidence: 99%