Formation of corrosion-based ZVMg nanoparticles for reductive degradation of high-level trichloroethylene in aqueous solution

Han, Lu; Gong, Zehan; Li, Jing; Chen, Mengfang; Ma, Jun; Wu, Wenlong; Chen, Xueyan; Yang, Lei

doi:10.1016/j.jhazmat.2023.132325

Cited by 8 publications

(3 citation statements)

References 48 publications

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“…Partial exceptions to this include recent studies of 2,4-dinitroanisole (DNAN) reduction by Mg/Cu and TCE reduction by nano ZVMg, both of which included some detailed characterization of the material surfaces, but mainly they focused on the contaminant reduction pathway and kinetics. 32,33 Since there are many potentially important differences between the environmental chemistry of ZVMg and ZVI (or ZVZ), e.g., as identified in our previous work, 18,19 greater attention to this aspect will be needed to fully assess the potential for ZVMg applications in water treatment.…”

Section: ■ Introductionmentioning

confidence: 92%

“…More recently, other approaches to maximizing or maintaining the reactivity of ZVMg with contaminants (again mainly vs chlorinated aromatics) have been investigated, such as combination of ZVMg with forms of activated carbon, − activation with ultrasonication or mechanochemical mixing, − or implementation in mixed-solvent media. − These studies put relatively little emphasis on how the inorganic chemistry of ZVMg influences its reactions with specific contaminants and its overall performance under geochemical conditions. Partial exceptions to this include recent studies of 2,4-dinitroanisole (DNAN) reduction by Mg/Cu and TCE reduction by nano ZVMg, both of which included some detailed characterization of the material surfaces, but mainly they focused on the contaminant reduction pathway and kinetics. , Since there are many potentially important differences between the environmental chemistry of ZVMg and ZVI (or ZVZ), e.g., as identified in our previous work, , greater attention to this aspect will be needed to fully assess the potential for ZVMg applications in water treatment.…”

Section: Introductionmentioning

confidence: 99%

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Modeling the Role in pH on Contaminant Sequestration by Zerovalent Metals: Chromate Reduction by Zerovalent Magnesium

Park,

Bandstra,

Tratnyek

et al. 2024

Environ. Sci. Technol.

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The role of pH in sequestration of Cr(VI) by zerovalent magnesium (ZVMg) was characterized by global fitting of a kinetic model to time-series data from unbuffered batch experiments with varying initial pH values. At initial pH values ranging from 2.0 to 6.8, ZVMg (0.5 g/L) completely reduced Cr(VI) (18.1 μM) within 24 h, during which time pH rapidly increased to a plateau value of ∼10. Time-series correlation analysis of the pH and aqueous Cr(VI), Cr(III), and Mg(II) concentration data suggested that these conditions are controlled by combinations of reactions (involving Mg 0 oxidative dissolution and Cr(VI) sequestration) that evolve over the time course of each experiment. Since this is also likely to occur during any engineering applications of ZVMg for remediation, we developed a kinetic model for dynamic pH changes coupled with ZVMg corrosion processes. Using this model, the synchronous changes in Cr(VI) and Mg(II) concentrations were fully predicted based on the Langmuir−Hinshelwood kinetics and transition-state theory, respectively. The reactivity of ZVMg was different in two pH regimes that were pH-dependent at pH < 4 and pH-independent at the higher pH. This contrasting pH effect could be ascribed to the shift of the primary oxidant of ZVMg from H + to H 2 O at the lower and higher pH regimes, respectively.

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Section: ■ Introductionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Modeling the Role in pH on Contaminant Sequestration by Zerovalent Metals: Chromate Reduction by Zerovalent Magnesium

Park,

Bandstra,

Tratnyek

et al. 2024

Environ. Sci. Technol.

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“…It also possesses performance superiority compared to related reported catalysts or even some precious metal-based catalysts (Figure 7). [64][65][66][67][68][69] The improvement in terms of activity on MoPÀ CÀ O (50 %) is due to the doping of oxygen elements, which increases the number of MoÀ PÀ O bonds, and the strong electronegativity of oxygen atom enriches the number of unsaturated coordination in the catalyst. Moreover, the existence of the carbon skeletons in MoPÀ CÀ O (50 %) create larger specific surface area, and the complexation between EDTA and Mo ions makes the active component MoP more dispersed.…”

Section: Hdc Performance Evaluation Of Mopà Cà O (X %) For Tcementioning

confidence: 99%

Carbon, Oxygen Co‐doped MoP as a High‐Efficiency Catalyst Towards Hydrodechlorination Reaction

Wang,

Zhang,

Yuan

et al. 2023

ChemistrySelect

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The harms caused by organic chlorides to the human body and the environment make the problem of how to degrade organic chlorides particularly urgent. Phosphides have gradually attracted attention in HDC due to their high catalytic performance. In view of the important role of O in catalytic process, the preparation of C, O co‐doped MoP was achieved by the synergistic modification of EDTA and glucose. Compared with unmodified MoP, the doping of carbon and oxygen in MoP−C−O ensure that more active sites are exposed on the surface. At the same time, the high dispersion of MoP on the carbon matrix increases the specific surface area of MoP−C−O, which is more conducive to the adsorption of reactants on the surface, thereby effectively improving the catalytic activity of the modified MoP−C−O. In the case of changing the molar ratio of MoP and surface modifier, the best activity of MoP−C−O (50 %) reaches 57.80 %, which is 2.3 times higher than that of MoP catalyst.

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Potential hazard analysis, bioremediation, and nonbioremediation of trichloroethylene

Tyagi

2025

Hazardous Chemicals

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Formation of corrosion-based ZVMg nanoparticles for reductive degradation of high-level trichloroethylene in aqueous solution

Cited by 8 publications

References 48 publications

Modeling the Role in pH on Contaminant Sequestration by Zerovalent Metals: Chromate Reduction by Zerovalent Magnesium

Modeling the Role in pH on Contaminant Sequestration by Zerovalent Metals: Chromate Reduction by Zerovalent Magnesium

Carbon, Oxygen Co‐doped MoP as a High‐Efficiency Catalyst Towards Hydrodechlorination Reaction

Potential hazard analysis, bioremediation, and nonbioremediation of trichloroethylene

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