A stepwise processing strategy for treating manganese residue and the remediation of hexavalent chromium in water and soil by manganese residue-derived (Fe,Mn)C2O4

Qingwen, Huang; Cai, Xuhui; Chen, Meifei; Yang, Qing; Fan, Songlin; Zhang, Yanjuan; Hu, Huayu; Gan, Tao; Huang, Zuqiang

doi:10.1016/j.cej.2022.135258

Cited by 31 publications

(4 citation statements)

References 62 publications

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“…The characteristic peaks at 743 and 1017 cm –1 were assigned to Fe–O stretching vibrations in γ-FeOOH . However, the peaks of surface hydroxyl at 1081 cm –1 belonged to the bending vibration of M–OH (M = Fe and Mn), indicating that the rich metal hydroxyl sites occurred on the surface of precipitates due to the addition of PM. − Moreover, the Fe–O groups at 743 cm –1 blue-shifted to 710 cm –1 , demonstrating the coexistence of Fe–O and Mn–O groups . Two rather distinct peaks at 1370 and 1492 cm –1 were accompanied by the addition of PM, which were ascribed to the CO 3 2– anion in the interlayer of Fe–Mn hydroxide. , This further evidenced the increase of active groups on the precipitate after PM addition.…”

Section: Resultsmentioning

confidence: 99%

“…37−39 Moreover, the Fe−O groups at 743 cm −1 blue-shifted to 710 cm −1 , demonstrating the coexistence of Fe−O and Mn−O groups. 40 Two rather distinct peaks at 1370 and 1492 cm −1 were accompanied by the addition of PM, which were ascribed to the CO 3 2− anion in the interlayer of Fe−Mn hydroxide. 36,41 This further evidenced the increase of active groups on the precipitate after PM addition.…”

Section: ■ Materials and Methodsmentioning

confidence: 97%

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Effect of a Permanganate-Bearing Reactive Oxidant on Flocs in Electrocoagulation: Transformations and Interfacial Interactions

Zhao

Yang

et al. 2023

Environ. Sci. Technol.

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The electrocoagulation/ultrafiltration (ECUF) process is expected to address the issues of current wastewater increments and complex water reuse. However, the underlying mechanism associated with flocs remains unclear in the ECUF system, especially in the upgraded permanganate-bearing ECUF (PECUF) system. Herein, flocs and their formation, response to organic matter (OM), and interfacial features in the PECUF process were systematically explored. Results demonstrated that permanganate contributed to the rapid start-up of the coagulation process by forming MnO 2 and blocking the ligand−metal charge transfer process between adsorbed Fe(II) and solid-phase Fe(III). The response of flocs to natural OM (NOM) exhibited obvious time-and particle size-dependent characteristics. Based on this, the optimal NOM adsorption window was found to be in the interval of 5−20 min, whereas the optimal NOM removal window was located at the 20−30 min interval. Furthermore, the extended Derjaguin−Landau− Verwey−Overbeek theory revealed the underlying principle of the PECUF module for optimizing UF performance. On the one hand, it reduced the inherent resistance of the cake layer by modifying the colloidal solution, which guaranteed a small drop (15%) in initial flux. On the other hand, it enhanced the repulsive force among suspended particles to achieve a long-term antifouling effect. This study may provide insights into the selection and performance control of on-demand assembly modules in decentralized water treatment systems.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Materials and Methodsmentioning

confidence: 97%

Effect of a Permanganate-Bearing Reactive Oxidant on Flocs in Electrocoagulation: Transformations and Interfacial Interactions

Zhao

Yang

et al. 2023

Environ. Sci. Technol.

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“…16 The peaks observed at 614 cm À1 and 514 cm À1 result from the asymmetric bending of Mn-O and the stretching vibration of O-Mn-O. 26 Beyond the analysis of the catalyst phase, Raman spectroscopy was employed to investigate the vibrational patterns of the catalyst's surface species. In Fig.…”

Section: Structural Information Of the Catalystsmentioning

confidence: 99%

Photothermal catalytic oxidation of toluene over the Pt–Mn₂O₃/CN nanocomposite catalyst

Yu,

Zhao,

Yang

et al. 2024

EES. Catal.

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“…Chromium exists mainly in the form of hexavalent chromium Cr(VI) and trivalent chromium Cr(III) in wastewater. The danger and toxicity of hexavalent chromium are much greater than that of trivalent chromium, and its toxicity is more than 100 times that of trivalent chromium (Huang et al, 2022). Cr(VI) is listed as one of the carcinogenic heavy metals, which is highly toxic and di cult to remove (Sun et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Highly efficient removal of hexavalent chromium by magnetic Fe–C composite from reed straw and electric furnace dust waste

Wang

Zeng

Wang

et al. 2022

Environ Sci Pollut Res

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Reed straw and electric furnace dust (EFD) waste were used to prepare magnetic Fe-C composite (EFD&C) by co-precipitation and high-temperature activation method to remove Cr(VI) from water. The magnetic EFD&C owned a large speci c surface (536.61 m 2 /g) and a porous structure (micropores and mesopores), and had an e cient removal capacity for Cr(VI). Under conditions of pH ( 2), the addition amount of EFD&C (1 g/L), the adsorption time (760 min), and the temperature (45 o C), the maximum adsorption capacity reached 111.94 mg/g. The adsorption mechanism mainly attributed to chemical adsorption (redox), Cr(VI) reduced to Cr(III) by Fe(II) and Fe(0) (from Fe 3 O 4 and Fe components in EFD) and surface functional groups of -OH, C = C, C-C and O-C = O (from biochar), and secondary attributed to physical adsorption, Cr(VI) and Cr(III) (from reduced Cr(VI)) adsorbed into the porous structure of EFD&C.This study provided guidance for the recycling of iron-containing metallurgical solid and biomass waste.

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A stepwise processing strategy for treating manganese residue and the remediation of hexavalent chromium in water and soil by manganese residue-derived (Fe,Mn)C2O4

Cited by 31 publications

References 62 publications

Effect of a Permanganate-Bearing Reactive Oxidant on Flocs in Electrocoagulation: Transformations and Interfacial Interactions

Effect of a Permanganate-Bearing Reactive Oxidant on Flocs in Electrocoagulation: Transformations and Interfacial Interactions

Photothermal catalytic oxidation of toluene over the Pt–Mn₂O₃/CN nanocomposite catalyst

Highly efficient removal of hexavalent chromium by magnetic Fe–C composite from reed straw and electric furnace dust waste

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A stepwise processing strategy for treating manganese residue and the remediation of hexavalent chromium in water and soil by manganese residue-derived (Fe,Mn)C2O4

Cited by 31 publications

References 62 publications

Effect of a Permanganate-Bearing Reactive Oxidant on Flocs in Electrocoagulation: Transformations and Interfacial Interactions

Effect of a Permanganate-Bearing Reactive Oxidant on Flocs in Electrocoagulation: Transformations and Interfacial Interactions

Photothermal catalytic oxidation of toluene over the Pt–Mn2O3/CN nanocomposite catalyst

Highly efficient removal of hexavalent chromium by magnetic Fe–C composite from reed straw and electric furnace dust waste

Contact Info

Product

Resources

About

Photothermal catalytic oxidation of toluene over the Pt–Mn₂O₃/CN nanocomposite catalyst