Mineral-mediated stability of organic carbon in soil and relevant interaction mechanisms

Eco-Environment & Health, Journal Year: 2024, Volume and Issue: 3(1), P. 59 - 76

Published: Jan. 3, 2024

Soil, the largest terrestrial carbon reservoir, is central to climate change and relevant feedback environmental health. Minerals are essential components that contribute over 60% of soil storage. However, how interactions between minerals organic shape transformation stability remains poorly understood. Herein, we critically review primary mechanisms, including sorption, redox reaction, co-precipitation, dissolution, polymerization, catalytic reaction. These interactions, highly complex with combination multiple processes, greatly affect through following processes: (1) formation or deconstruction mineral-organic association; (2) oxidative minerals; (3) polymerization (4) varying association according mineral transformation. Several pieces evidence related turnover during interaction in real eco-environment then demonstrated. We also highlight current research gaps outline priorities, which may map future directions for a deeper mechanisms-based understanding storage capacity considering its minerals.

Language: Английский

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Manganese Dioxides Induce the Transformation and Protection of Dissolved Organic Matter Simultaneously: A Significance of Crystallinity

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 9, 2025

Interactions between manganese dioxides (MnO2) and dissolved organic matter (DOM) have long been the subject of scientific inquiry. However, effect MnO2 crystallinity on DOM fate remains unclear. Herein, we comprehensively investigate adsorption, protection, mineralization by with various crystallinities (order crystallinity: γ-30 < γ-90 γ-120). The results show that adsorption is positively correlated specific surface area (SSA) MnO2; largest SSA adsorbs highest amount DOM, resulting in protection. γ-120 a smaller could induce Maillard reaction thereby promote formation geopolymerized matter, leading to reduced bioavailability DOM. Furthermore, capability mineralize decreases order > γ-30, it determined both Mn4+ hydroxyl radical (·OH) content. In particular, contribution radical-based oxidation ·OH 64.8, 47.4, 23.7% for γ-90, γ-120, respectively. We propose may significant but hitherto unexplored influence global carbon cycle over geological time.

Language: Английский

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Redox-induced transformation of potentially toxic elements with organic carbon in soil

Carbon Research, Journal Year: 2022, Volume and Issue: 1(1)

Published: June 29, 2022

Abstract Soil organic carbon (SOC) is a crucial component that significantly affects the soil fertility, remediation, and sequestration. Here, we review redox-induced transformation of potentially toxic elements (PTEs) through abiotic impact SOC. The complex composition SOC includes humus, pyrogenic (e.g., biochar), dissolved matter, anthropogenic compost), with varying concentrations properties. primary redox moieties on are surface functionalities phenol, quinone, N/S-containing functional groups), environmentally persistent free radicals, graphitic structures, their contents highly variable. Owing to these rich moieties, can directly affect reduction oxidation PTEs in soil, such as Cr(VI) As(III) oxidation. In addition, interactions between (i.e., O 2 , Fe, Mn minerals) cause PTEs. formation reactive oxygen species, Fe(II), Mn(III)/Mn(II) main contributor PTEs, including As(III)/Cr(III)/Tl(I) We articulated both positive negative effects which could guide remediation efforts. Further scientific studies necessary better understand potential transformations by SOC, considering complicated variable composition, biotic environment. Graphical

Language: Английский

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Reductive Sequestration of Cr(VI) and Immobilization of C during the Microbially Mediated Transformation of Ferrihydrite-Cr(VI)-Fulvic Acid Coprecipitates

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(22), P. 8323 - 8334

Published: May 22, 2023

Cr(VI) detoxification and organic matter (OM) stabilization are usually influenced by the biological transformation of iron (Fe) minerals; however, underlying mechanisms metal-reducing bacteria on coupled kinetics Fe minerals, Cr, OM remain unclear. Here, reductive sequestration immobilization fulvic acid (FA) during microbially mediated phase ferrihydrite with varying Cr/Fe ratios were investigated. No occurred until was completely reduced, rate decreased as ratio increased. Microscopic analysis uncovered, which revealed that resulting Cr(III) incorporated into lattice structure magnetite goethite, whereas mainly adsorbed goethite surfaces located within pore spaces. Fine line scan profiles showed mineral surface had a lower oxidation state than nanopores, C highest state. During transformation, FA minerals predominantly via complexation, highly aromatic unsaturated structures low H/C easily or decomposed bacteria, little effect binding variations in components. Owing to inhibition crystalline nanopore formation presence Cr can be synchronously favored at ratios. These findings provide profound theoretical basis for synchronous anoxic soils sediments.

Language: Английский

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Molecular insights into effects of PBAT microplastics on latosol microbial diversity and DOM chemodiversity

Journal of Hazardous Materials, Journal Year: 2023, Volume and Issue: 450, P. 131076 - 131076

Published: Feb. 23, 2023

Language: Английский

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Unraveling Multiple Pathways of Electron Donation from Phenolic Moieties in Natural Organic Matter

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(44), P. 16895 - 16905

Published: Oct. 23, 2023

Natural organic matter (NOM) exhibits a distinctive electron-donating capacity (EDC) that serves pivotal role in the redox reactions of contaminants and minerals through transformation phenolic moieties. However, ambiguity molecular pathways (MTPs) engender EDC during NOM oxidation remains significant issue. Here, MTPs contribute to were investigated by identifying oxidized products model compounds samples direct or mediated electrochemical (DEO MEO, respectively) using Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS). It was found newly formed phenolic-OH (ArOH) oxidative coupling reaction phenoxy radical are main directly EDC, addition hydroquinones quinones. Notably, ArOH contributed at least 22–42% EDC. Ferulic acid-like structures can also incorporating H2O into their acrylic substituents. Furthermore, opening C rings indirectly attenuate structural alterations process NOM. Decarboxylation either weaken enhance depending on structure moieties These findings suggest is comprehensive result multiple MTPs, involving not only but olefinic bonds bond-breaking reactions. Our work provides evidence aids comprehension EDC-associated

Language: Английский

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Controls of Mineral Solubility on Adsorption-Induced Molecular Fractionation of Dissolved Organic Matter Revealed by 21 T FT-ICR MS

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(5), P. 2313 - 2322

Published: Jan. 24, 2024

Mineral adsorption-induced molecular fractionation of dissolved organic matter (DOM) affects the composition both DOM and OM adsorbed thus stabilized by minerals. However, it remains unclear what mineral properties control magnitude fractionation. Using a combined technique approach that leverages identified ultrahigh resolution 21 T Fourier transform ion cyclotron resonance mass spectrometry adsorption isotherms, we catalogue compositional differences occur at level results in due to Suwannee River fulvic acid on aluminum (Al) iron (Fe) oxides phyllosilicate (allophane) species contrasting properties. The minerals high solubility (i.e., amorphous Al oxide, boehmite, allophane) exhibited much stronger capabilities than low gibbsite Fe oxides). Specifically, former released Al3+ solution (0.05–0.35 mM) formed complexes with likely reduced surface hydrophobicity mineral-OM assemblage, increasing preference for adsorbing polar molecules. impacts are exacerbated fact interactions also enhance metal release from For sparsely soluble minerals, hydrophobicity, instead solubility, appeared be primary their power. Other chemical seemed less directly relevant fractionating DOM.

Language: Английский

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Activation of iron oxide minerals in an aquifer by humic acid to promote adsorption of organic molecules

Journal of Environmental Management, Journal Year: 2024, Volume and Issue: 356, P. 120543 - 120543

Published: March 12, 2024

Language: Английский

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Minerals: A missing role for enhanced biochar carbon sequestration from the thermal conversion of biomass to the application in soil

Earth-Science Reviews, Journal Year: 2022, Volume and Issue: 234, P. 104215 - 104215

Published: Oct. 13, 2022

Language: Английский

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Coupled variations of dissolved organic matter distribution and iron (oxyhydr)oxides transformation: Effects on the kinetics of uranium adsorption and desorption

Journal of Hazardous Materials, Journal Year: 2022, Volume and Issue: 436, P. 129298 - 129298

Published: June 6, 2022

Language: Английский

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