Dynamic interactions at the mineral–organic matter interface

Nature Reviews Earth & Environment, Journal Year: 2021, Volume and Issue: 2(6), P. 402 - 421

Published: May 11, 2021

Language: Английский

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An evolving view on biogeochemical cycling of iron

Nature Reviews Microbiology, Journal Year: 2021, Volume and Issue: 19(6), P. 360 - 374

Published: Feb. 1, 2021

Language: Английский

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Fe(II) Redox Chemistry in the Environment

Chemical Reviews, Journal Year: 2021, Volume and Issue: 121(13), P. 8161 - 8233

Published: June 18, 2021

Iron (Fe) is the fourth most abundant element in earth's crust and plays important roles both biological chemical processes. The redox reactivity of various Fe(II) forms has gained increasing attention over recent decades areas (bio) geochemistry, environmental chemistry engineering, material sciences. goal this paper to review these advances current state knowledge environment. Specifically, comprehensive focuses on four types species including aqueous Fe(II), complexed with ligands, minerals bearing structural sorbed mineral oxide surfaces. formation pathways, factors governing reactivity, insights into potential mechanisms, comparison, characterization techniques are discussed reference breakthroughs field where possible. We also cover applications zerovalent iron, microbial processes, biogeochemical cycling carbon nutrients, their abiotic oxidation related processes natural engineered systems.

Language: Английский

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A critical review of mineral–microbe interaction and co-evolution: mechanisms and applications

National Science Review, Journal Year: 2022, Volume and Issue: 9(10)

Published: July 4, 2022

Mineral–microbe interactions play important roles in environmental change, biogeochemical cycling of elements and formation ore deposits. Minerals provide both beneficial (physical chemical protection, nutrients, energy) detrimental (toxic substances oxidative pressure) effects to microbes, resulting mineral-specific microbial colonization. Microbes impact dissolution, transformation precipitation minerals through their activity, either genetically controlled or metabolism-induced biomineralization. Through these interactions, microbes co-evolve Earth history. typically occur at microscopic scale but the effect is often manifested global scale. Despite advances achieved decades research, major questions remain. Four areas are identified for future research: integrating mineral ecology, establishing biosignatures, linking laboratory mechanistic investigation field observation, manipulating mineral–microbe benefit humankind.

Language: Английский

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A Critical Review on the Multiple Roles of Manganese in Stabilizing and Destabilizing Soil Organic Matter

Environmental Science & Technology, Journal Year: 2021, Volume and Issue: 55(18), P. 12136 - 12152

Published: Sept. 1, 2021

Manganese (Mn) is a biologically important and redox-active metal that may exert poorly recognized control on carbon (C) cycling in terrestrial ecosystems. influences ecosystem C dynamics by mediating biochemical pathways include photosynthesis, serving as reactive intermediate the breakdown of organic molecules, binding and/or oxidizing molecules through organo-mineral associations. However, potential for Mn to influence storage remains unresolved. Although substantial research has demonstrated ability Fe- Al-oxides stabilize matter, there scarcity similar information regarding Mn-oxides. Furthermore, Mn-mediated reactions regulate litter decomposition pathways, but these processes are constrained across diverse Here, we discuss ecological roles environments synthesize existing knowledge multiple which biogeochemical intersect. We demonstrate high degrade abiotic microbially mediated oxidation at least temporarily, outline priorities needed advance understanding Mn-C interactions, highlighting gaps address key uncertainties soil predictions.

Language: Английский

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Coupled iron cycling and organic matter transformation across redox interfaces

Nature Reviews Earth & Environment, Journal Year: 2023, Volume and Issue: 4(9), P. 659 - 673

Published: Aug. 24, 2023

Language: Английский

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Iron mineral dissolution releases iron and associated organic carbon during permafrost thaw

Nature Communications, Journal Year: 2020, Volume and Issue: 11(1)

Published: Dec. 10, 2020

Abstract It has been shown that reactive soil minerals, specifically iron(III) (oxyhydr)oxides, can trap organic carbon in soils overlying intact permafrost, and may limit mobilization degradation as it is observed other environments. However, the use of iron(III)-bearing minerals terminal electron acceptors permafrost environments, thus their stability capacity to prevent during thaw, poorly understood. We have followed dynamic interactions between iron using a space-for-time approach across thaw gradient Abisko (Sweden), where wetlands are expanding rapidly due thaw. show through bulk (selective extractions, EXAFS) nanoscale analysis (correlative SEM nanoSIMS) bound Fe primarily transition mineral horizons palsa underlain by (41.8 ± 10.8 mg per g soil, 9.9 14.8% total carbon). During water-logging O 2 limitation lead reducing conditions an increase abundance Fe(III)-reducing bacteria which favor dissolution drive both along gradient. By providing acceptor, this rusty sink effectively destroyed cannot release with

Language: Английский

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Fenton chemistry and reactive oxygen species in soil: Abiotic mechanisms of biotic processes, controls and consequences for carbon and nutrient cycling

Earth-Science Reviews, Journal Year: 2021, Volume and Issue: 214, P. 103525 - 103525

Published: Jan. 17, 2021

Language: Английский

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Overlooked Formation of H₂O₂ during the Hydroxyl Radical-Scavenging Process When Using Alcohols as Scavengers

Environmental Science & Technology, Journal Year: 2022, Volume and Issue: 56(6), P. 3386 - 3396

Published: March 1, 2022

Hydroxyl radical (•OH) is an active species widely reported in studies across many scientific fields, and hence, its reliable analysis vitally important. Currently, alcohols are commonly used as scavengers for •OH determination. However, the impacts of on reliability detection remain unknown. In this study, we found that adding different types amounts water samples treated with ultraviolet irradiation undesirably produced substantial hydrogen peroxide (H2O2), which a known precursor. This means conventional determination method using likely unreliable or even misleading. Through careful investigation, revealed overlooked reaction pathway during H2O2 transformations. Varying oxygen concentrations, pHs, alcohol dosages, altered formation, can affect accuracy. Among alcohols, n-butanol best scavenger because it quenches rapidly but re-forms little H2O2.

Language: Английский

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Beyond bulk: Density fractions explain heterogeneity in global soil carbon abundance and persistence

Global Change Biology, Journal Year: 2021, Volume and Issue: 28(3), P. 1178 - 1196

Published: Dec. 4, 2021

Understanding the controls on amount and persistence of soil organic carbon (C) is essential for predicting its sensitivity to global change. The response may depend whether C unprotected, isolated within aggregates, or protected from decomposition by mineral associations. Here, we present a synthesis relative influence environmental factors partitioning among pools, abundance in each pool (mg g-1 soil), (as approximated radiocarbon abundance) relatively unprotected particulate mineral-bound pools. We show that mineral-associated pools consistently differed one another degree relationship factors. Soil depth was best predictor persistence, though it accounted more variance persistence. Persistence all decreased with increasing mean annual temperature (MAT) throughout profile, whereas increased wetness index (MAP/PET) subsurface soils (30-176 cm). soil) climate varied depth. Mineral-associated surface (<30 cm) strongly than free C, but both showed attenuated responses at Overall, these relationships suggest strong properties, potential loss areas decreasing wetness. Relative significantly land cover types parent material lithologies. This variability pool's suggests not equally vulnerable Therefore, projections future based patterns bulk be misleading.

Language: Английский

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