Fenton and Fenton-like wet oxidation for degradation and destruction of organic radioactive wastes

Walling, Sam A.; Um, Wooyong; Corkhill, Claire L.; Hyatt, Neil C.

doi:10.1038/s41529-021-00192-3

Cited by 42 publications

(20 citation statements)

References 102 publications

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“…This can be explained by the reaction between protons and hydroxyl radicals. In highly acidic solutions, these radicals are "scavenged" by hydrogen ions (Walling et al, 2021). This can explain the difference in optimal pH values between the two methods.…”

Section: Discussionmentioning

confidence: 99%

Determination of Ideal Conditions for the Production of Hydroxyl Radicals through Spectroscopy of Ferric Thiocyanate and Methyl Orange

Maken¹

2023

Preprint

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When the human body comes in contact with radiation, water breaks down into ROS, Reactive Oxidative Species such as hydroxyl radicals, in a process called radiolysis. With the presence of hydroxyl radicals (HOᐧ) and other ROS, DNA in the human body is susceptible to mutations. While hydrogen peroxide (H₂O₂), a product of radiolysis, may not be a strong ROS on its own, it can react with certain metals such as Iron(II) to produce hydroxyl radicals in a process called the Fenton Reaction. This study aimed to use the cost-effective spectroscopic study of Ferric Thiocyanate and Methyl Orange to determine optimum conditions for the Fenton Reaction. Understanding conditions and methods of detecting products of the Fenton Reaction is key to determine how and under what circumstances hydroxyl radicals are readily produced in the human body, putting humans at risk of cancer. Through the spectroscopic analysis of FeSCN2+ and degradation of Methyl Orange, it was determined that the Fenton Reaction occurred ideally at a pH between 2.0-4.0 with low temperature dependence. Furthermore, both spectroscopic methods were viable options for detecting the efficiency of Fenton Processes.

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Section: Discussionmentioning

confidence: 99%

Determination of Ideal Conditions for the Production of Hydroxyl Radicals through Spectroscopy of Ferric Thiocyanate and Methyl Orange

Maken¹

2023

Preprint

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“…In his honor, ferrous salts and H 2 O 2 are called Fenton reagents, and the reaction of Fe 2+ and H 2 O 2 is the classic Fenton process. In the Fenton process, Fe 2+ activates H 2 O 2 to produce various reactive oxygen species (ROS), including ·OH, superoxide anion radical (·O 2– ), and singlet oxygen ( 1 O 2 ), among which ·OH is the main functional ROS and has the second highest oxidation potential of 2.8 eV in nature. , The Fenton process is widely used to degrade biorefractory organic contaminants such as phenols, pesticides, pharmaceuticals, and organic solvents into harmless inorganic matter, such as carbon dioxide and water due to the production of ROS with strong oxidation potential . Recently, some researchers have realized the removal of microplastics by using the Fenton process.…”

Section: Fenton Processmentioning

confidence: 99%

“…53,54 The Fenton process is widely used to degrade biorefractory organic contaminants such as phenols, pesticides, pharmaceuticals, and organic solvents into harmless inorganic matter, such as carbon dioxide and water due to the production of ROS with strong oxidation potential. 55 Recently, some researchers have realized the removal of microplastics by using the Fenton process.…”

Section: ■ Fenton Processmentioning

confidence: 99%

Emerging Technologies for Waste Plastic Treatment

Tan

Xie

et al. 2023

ACS Sustainable Chem. Eng.

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The existence of waste plastics and microplastics has caused serious pollution to the ecological environment. Harsh reaction conditions or long reaction time are typically required for the current waste plastic treatment technologies, resulting in high energy consumption and capital cost. Recently, plasma, Fenton, and electrochemical technologies have emerged to upcycle waste plastics under mild conditions and remove microplastics efficiently. The fundamentals and applications of plasma, Fenton, and electrochemical technologies in waste plastic treatment are reviewed. The prospects of these emerging technologies are also discussed, aiming to provide the scientific background, application status, and technical challenges for these emerging technologies for waste plastic treatment.

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“…The hydroxyl radical (HO • , 2.8 V vs normal hydrogen electrode) is considered as one of the most powerful oxidizing agents in nature, capable of attacking and degrading various organic pollutants including plastics in the environment. − The effectiveness of photo-Fenton chemistry for microplastics degradation was proved on chemically activated polymers previously. Sulfonated virgin PE and PE waste (LDPE, HDPE), sulfonated PS, PP, and PVC were shown to undergo partial oxidation after FeCl 3 grafting, producing low-molecular-weight organic molecules and CO 2 .…”

Section: Micromotors For Microplastics Decompositionmentioning

confidence: 99%

Micromachines for Microplastics Treatment

Hermanová

Pumera

2022

ACS Nanosci. Au

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The increasing accumulation of persistent nondegradable microplastics in the marine environment represents a global environmental problem. Among emerging approaches to tackle microplastics are micro-and nanomotors, tiny devices capable of autonomous propulsion powered by chemical fuels or light. These devices are capable of on-the-fly recognition, capture, and decomposition of pollutants. In the past, various micromotors were designed to efficiently remove and degrade soluble organic pollutants. Current effort is given to the rational design and surface functionalization to achieve micromotors capable of capturing, transporting, and releasing microplastics of different shapes and chemical structures. The catalytic micromotors performing photocatalysis and photo-Fenton chemistry hold great promise for the degradation of most common plastics. In this review, we highlight recent progress in the field of micromotors for microplastics treatment. These tiny self-propelled machines are expected to stimulate a quantum leap in environmental remediation.

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Fenton and Fenton-like wet oxidation for degradation and destruction of organic radioactive wastes

Cited by 42 publications

References 102 publications

Determination of Ideal Conditions for the Production of Hydroxyl Radicals through Spectroscopy of Ferric Thiocyanate and Methyl Orange

Determination of Ideal Conditions for the Production of Hydroxyl Radicals through Spectroscopy of Ferric Thiocyanate and Methyl Orange

Emerging Technologies for Waste Plastic Treatment

Micromachines for Microplastics Treatment

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