Iron activated sodium bisulfite enhances generation of Mn (III) species through the MnO2/bisulfite catalytic process

Hou, Zaiyao; Ma, Jianfeng; Fan, Changhai; Peng, Mingguo; Komarneni, Sridhar

doi:10.1016/j.ceramint.2018.09.262

Cited by 12 publications

(5 citation statements)

References 36 publications

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“…However, neither tert -butanol nor methanol affected degradation of rhodamine B in the systems with Fe1Mn5 and Mn 2 O 3 as the catalyst, indicating that HO • and SO 4 •– were not the dominant ROS in the solution or bound on the surface of the catalyst in those systems. It has been reported that Mn(III) may dominate in the homogeneous and heterogeneous reaction of manganese to activate bisulfite. , Nevertheless, an unusual phenomenon was discovered: Mn(III) was not captured throughout the degradation process (Figure b). Therefore, other ROS might be involved in the activated bisulfite system using manganese.…”

Section: Resultsmentioning

confidence: 93%

“…As the molar ratio of Mn increases, the Fe1Mn1 and Fe1Mn2 samples not only show the original MnFe 2 O 4 peak but also have additional peaks (41 and 42°), which can be attributed to MnO 2 . 13 Furthermore, the peaks of iron oxide gradually weakened, and only the diffraction peaks of Mn 3 O 4 (PDF#24-0734) were observed in Fe1Mn5.…”

Section: Resultsmentioning

confidence: 99%

“…It has been reported that Mn(III) may dominate in the homogeneous and heterogeneous reaction of manganese to activate bisulfite. 13,15 Nevertheless, an unusual phenomenon was discovered: Mn(III) was not captured throughout the degradation process (Figure 3b). Therefore, other ROS might be involved in the activated bisulfite system using manganese.…”

Section: Identification Of Rosmentioning

confidence: 99%

“…These studies have proposed a non-radical oxidation mechanism in light of findings that methanol (MeOH) or tert -butanol (TBA) (scavengers for SO 4 •– or HO • , respectively) did not significantly inhibit the degradation of organic compounds caused by the transition-metal-ion activation of bisulfite. 13 Sun et al 14 showed that in an established permanganate/bisulfite system, a large amount of Mn(III) species (existing in the form of hydroxo-Mn 3+ , Mn(III)-sulfur complex, or other types of intermediate) with strong oxidizing power were produced in a short period of time, leading to degradation of the organic compounds. In addition, Zhang et al 15 found that the Fe 2+ /Mn 2+ /sulfite process could be rendered a more cost-effective oxidation process by promoting the production of SO 5 •– to accelerate the oxidation of Mn(II) to Mn(III).…”

Section: Introductionmentioning

confidence: 99%

“…In addition, Dong et al confirmed the formation of Cr(V) in Cr(VI)/sulfite process and proposed a new mechanism for Cr(V) degradation of organic pollutants in oxygen-containing solutions. These studies have proposed a non-radical oxidation mechanism in light of findings that methanol (MeOH) or tert -butanol (TBA) (scavengers for SO 4 •– or HO • , respectively) did not significantly inhibit the degradation of organic compounds caused by the transition-metal-ion activation of bisulfite . Sun et al showed that in an established permanganate/bisulfite system, a large amount of Mn(III) species (existing in the form of hydroxo-Mn 3+ , Mn(III)-sulfur complex, or other types of intermediate) with strong oxidizing power were produced in a short period of time, leading to degradation of the organic compounds.…”

Section: Introductionmentioning

confidence: 99%

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Degradation of an Organic Dye by Bisulfite Catalytically Activated with Iron Manganese Oxides: The Role of Superoxide Radicals

et al. 2020

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Metal-activated bisulfite systems have been widely used to treat recalcitrant wastewater. However, due to the disadvantages of their narrow effective pH range and difficulty in recovering metal ions, homogeneous systems are severely limited in practical applications. To overcome these problems, Fe/Mn bimetallic catalysts with different molar ratios were prepared using a simple sol–gel method to activate bisulfite. Influential factors, such as catalyst and system types, catalyst dosage, bisulfite concentration, pH value, and bisulfite addition modes, were investigated. The new system exhibited a wide effective pH range and high degradation efficiency, and it was found that the dissolved oxygen content played an important role in the activation system. The radical quenching test showed that a superoxide radical (O 2 •– ), instead of a hydroxyl radical (HO • ) or a sulfate radical (SO 4 •– ), was the main oxide species for the degradation of rhodamine B (RhB).

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Section: Resultsmentioning

confidence: 93%

Section: Resultsmentioning

confidence: 99%

Section: Identification Of Rosmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Degradation of an Organic Dye by Bisulfite Catalytically Activated with Iron Manganese Oxides: The Role of Superoxide Radicals

et al. 2020

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The important role of the interaction between manganese minerals and metals in environmental remediation: a review

Chen

Qiu

et al. 2023

Environ Sci Pollut Res

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With illegal discharge of wastewater containing inorganic and organic pollutants, combined pollution is common and need urgent attention. Understanding the migration and transformation laws of pollutants in the environment has important guiding signi cance for environmental remediation. Due to the characteristics of adsorption, oxidation and catalysis, manganese minerals play important role in the environment fate of pollutants. This review summarizes the forms of interaction between manganese minerals and metals, the environmental importance of the interaction between manganese minerals and metals, and the contribution of this interaction in improving performance of Mn-based composite for environmental remediation. The literatures have indicated that the interactions between manganese minerals and metals involve in surface adsorption, lattice replacement and formation of association minerals. The synergistic or antagonistic effect resulted from the interaction in uence the puri cation of heavy metal and organism pollutant. The synergistic effect bene ted from the coordination of adsorption and oxidation, convenient electron transfer, abundant oxygen vacancies and fast migration of lattice oxygen. Based on the synergy, Mn-based composites have been widely used for environmental remediation. This review is helpful to fully understand the migration and transformation process of pollutants in the environment, expand the resource utilization of manganese minerals for environmental remediation.

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Manganese oxide and derivative-modified materials in advanced oxidation processes: A review of modification enhancement and activation mechanisms

Sun,

Song,

Yang

et al. 2024

Chinese Chemical Letters

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Iron activated sodium bisulfite enhances generation of Mn (III) species through the MnO2/bisulfite catalytic process

Cited by 12 publications

References 36 publications

Degradation of an Organic Dye by Bisulfite Catalytically Activated with Iron Manganese Oxides: The Role of Superoxide Radicals

Degradation of an Organic Dye by Bisulfite Catalytically Activated with Iron Manganese Oxides: The Role of Superoxide Radicals

The important role of the interaction between manganese minerals and metals in environmental remediation: a review

Manganese oxide and derivative-modified materials in advanced oxidation processes: A review of modification enhancement and activation mechanisms

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