Reductive release of Fe mineral-associated organic matter accelerated by oxalic acid

Ding, Yang; Ye, Qianting; Liu, Minqin; Shi, Zhenqing; Yao, Liang

doi:10.1016/j.scitotenv.2020.142937

Cited by 21 publications

(9 citation statements)

References 63 publications

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“…Similar to ligand-promoted dissolution, reductive and oxidative dissolution are important for marine biochemistry, mineral extraction and mine waste remediation, soil biogeochemistry, and water quality. , The general principle of redox-mediated dissolution and precipitation is based on the change in solubility of many elements with variable oxidation state. For example, Fe 2+ is much more soluble than Fe 3+ , so reduction leads to dissolution of Fe-oxides, and UO 2 2+ (i.e., U 6+ ) is more soluble than U 4+ (e.g., UO 2 , uraninite), so oxidation causes dissolution.…”

Section: Theme 3: Dissolution Nucleation and Growthmentioning

confidence: 99%

“…Dissolution. Similar to ligand-promoted dissolution, reductive and oxidative dissolution are important for marine biochemistry, 945 mineral extraction and mine waste remediation, 78 soil biogeochemistry, 946 and water quality. 736,947 The general principle of redoxmediated dissolution and precipitation is based on the change in solubility of many elements with variable oxidation state.…”

Section: Reductive and Oxidativementioning

confidence: 99%

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Oxide– and Silicate–Water Interfaces and Their Roles in Technology and the Environment

et al. 2023

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Interfacial reactions drive all elemental cycling on Earth and play pivotal roles in human activities such as agriculture, water purification, energy production and storage, environmental contaminant remediation, and nuclear waste repository management. The onset of the 21st century marked the beginning of a more detailed understanding of mineral aqueous interfaces enabled by advances in techniques that use tunable high-flux focused ultrafast laser and X-ray sources to provide near-atomic measurement resolution, as well as by nanofabrication approaches that enable transmission electron microscopy in a liquid cell. This leap into atomic-and nanometer-scale measurements has uncovered scale-dependent phenomena whose reaction thermodynamics, kinetics, and pathways deviate from previous observations made on larger systems. A second key advance is new experimental evidence for what scientists hypothesized but could not test previously, namely, interfacial chemical reactions are frequently driven by "anomalies" or "non-idealities" such as defects, nanoconfinement, and other nontypical chemical structures. Third, progress in computational chemistry has yielded new insights that allow a move beyond simple schematics, leading to a molecular model of these complex interfaces. In combination with surfacesensitive measurements, we have gained knowledge of the interfacial structure and dynamics, including the underlying solid surface and the immediately adjacent water and aqueous ions, enabling a better definition of what constitutes the oxide− and silicate−water interfaces. This critical review discusses how science progresses from understanding ideal solid−water interfaces to more realistic systems, focusing on accomplishments in the last 20 years and identifying challenges and future opportunities for the community to address. We anticipate that the next 20 years will focus on understanding and predicting dynamic transient and reactive structures over greater spatial and temporal ranges as well as systems of greater structural and chemical complexity. Closer collaborations of theoretical and experimental experts across disciplines will continue to be critical to achieving this great aspiration.

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Section: Theme 3: Dissolution Nucleation and Growthmentioning

confidence: 99%

Section: Reductive and Oxidativementioning

confidence: 99%

Oxide– and Silicate–Water Interfaces and Their Roles in Technology and the Environment

et al. 2023

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“…Among these, citric acid is an important organic acid with a strong, sour taste, is easily soluble in water, and is a natural preservative [ 22 ], while tartaric acid is a natural antioxidant and flavorant in foods [ 23 ]. Moreover, oxalic acid easily combines with mineral elements to form insoluble oxalate, and vegetables with a high oxalic acid content can be consumed in large quantities with a distinct bitter taste and may cause hyperoxaluria and kidney stones [ 24 , 25 ]. Gonostegia hirta contains slightly higher oxalic acid levels than lettuce (1.16 to 1.67 mg/g DW) [ 18 ], but less than conventional spinach (about 8 to 12.5 mg/g) [ 26 ].…”

Section: Resultsmentioning

confidence: 99%

Nutritional Composition and Antioxidant Activity of Gonostegia hirta: An Underexploited, Potentially Edible, Wild Plant

Chen

Bao-cheng

et al. 2023

Plants

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Wild, edible plants have received increasing attention as an important complement to cultivate vegetables, as they represent an easily accessible source of nutrients, mineral elements, and antioxidants. In this study, the tender stems and leaves of Gonostegia hirta, an edible species for which only scarce data are available in the literature, are thoroughly evaluated for their nutritional profile, chemical characterization, and antioxidant activity. Being considered as an underexploited, potentially edible plant, the nutritional composition of Gonostegia hirta was identified, and several beneficial compounds were highlighted: sugars, potassium, calcium, organic acids, fatty acids, phenolics, and flavonoids. A total of 418 compounds were identified by metabolomic analysis, including phenolic acids, flavonoids, amino acids, lipids, organic acids, terpenoids, alkaloids, nucleotides, tannins, lignans, and coumarin. The plant sample was found to have good antioxidant capacities, presented by DPPH, FRAP, ABTS+, hydroxyl radical scavenging capacity, and its resistance to the superoxide anion radical test. In general, Gonostegia hirta has a good nutritional and phytochemical composition. The health benefits of Gonostegia hirta as a vegetable and herbal medicine is important for both a modern diet and use in medication.

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“…In detail, added A-HS is an organic ionic structure with abundant counterions, a weakly acidic organic acid salt (Yang et al, 2019). The introduction of the included low molecular weight organic acids supports as a food source the growth of bacteria, so as to induce increasing soil respiration (Ding et al, 2021). At the same time, such ionic and polar additives change freezing behavior and ice crystal morphology, that is life can sustain at least in highly concentrated pockets of organic matter, concentrated by the removal of water by ice crystallization (Figure S6).…”

Section: Structural Equation Modelmentioning

confidence: 99%

Moderating carbon dynamics in black soil by combined application of biochar and an artificial humic substance

et al. 2022

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The mineralization and humification of organic matter triggered by added exogenous carbon are relevant to soil organic matter (SOM) turnover and stability. Biochar (BC) and artificial humic substance (A‐HS), two typical exogenous carbon materials, have not been jointly applied to seek to improve the soil carbon pool, which is contributed by the development of A‐HS which has not yet been used on a large‐scale. We surmise that the dynamic interactions occurring in combined application of BC and A‐HS are complex and deserve detailed attention. Herein, a continuous incubation experiment including relevant weather events (freezing, freezing–thawing, warming climates) was conducted for 180 days to observe the development of SOM in the different stages and under separate and mixed applications of A‐HS and BC. After 45 d cultivation period and the freezing phase, the relative mineralization rate of SOM was up to 6.4% (120 ml/kg A‐HS), 4.9% (2% BC) and 13.3% (for the combination of 120 ml/kg A‐HS and 2% BC), suggesting that the presence of A‐HS triggers an enhanced mineralization of SOM throughout freezing. However, the remaining SOM turned out to be more strongly humified and more stable, preserving the SOM through the warming season, as shown by ultraviolet fluorescence and high‐throughput sequencing. Overall, the dynamic interactions between BC and A‐HS are shown to be mainly mediated by biological activity and alterations of microbial community structure and the related metabolic preferred pathways, which vice versa can be influenced by the added carbon sources.

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Reductive release of Fe mineral-associated organic matter accelerated by oxalic acid

Cited by 21 publications

References 63 publications

Oxide– and Silicate–Water Interfaces and Their Roles in Technology and the Environment

Oxide– and Silicate–Water Interfaces and Their Roles in Technology and the Environment

Nutritional Composition and Antioxidant Activity of Gonostegia hirta: An Underexploited, Potentially Edible, Wild Plant

Moderating carbon dynamics in black soil by combined application of biochar and an artificial humic substance

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