Characterization of Fe-Mn concentric nodules from Luvisol irrigated by mine water in a semi-arid agricultural area

Ettler, Vojtěch; Chren, Martin; Mihaljevič, Martin; Drahota, Petr; Křı́bek, Bohdan; Veselovský, František; Šráček, Ondra; Vaněk, Aleš; Penížek, Vít; Komárek, Michael; Mapani, Benjamin; Kamona, Fred

doi:10.1016/j.geoderma.2017.03.022

Cited by 48 publications

(27 citation statements)

References 36 publications

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“…The widespread iron (Fe(III)) oxides are among the most reactive minerals that can both adsorb OM and catalyze Mn(II) oxidation. Both Mn and Fe are redox active elements and thus, they often occur together, such as in aggregates and Fe–Mn nodules of soils and sediments and coatings on rock surfaces. − Mn(III,IV) are more reducible than Fe(III) oxides while Mn(II) is more difficult to oxidize than Fe(II) by O 2 . Thus, Mn(II) often coexists with Fe(III) oxides in many redox-active environments .…”

Section: Introductionmentioning

confidence: 99%

Coupled Manganese Redox Cycling and Organic Carbon Degradation on Mineral Surfaces

Yang

et al. 2020

Environ. Sci. Technol.

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Minerals, natural organic matter (NOM), and divalent manganese (Mn(II)) often coexist in suboxic/oxic environment. Multiple adsorption and oxidation processes occur in this ternary system, which are coupled to affect the fate of both OM and Mn therein and alter their chemical reactivity toward metals and other pollutants. However, the details about the coupling are poorly known although much has been gained for the binary systems. We determined the mutual influence of surfacecatalyzed Mn(II) oxidation and humic acid (HA) adsorption and oxidation in a Fe(III) oxide (goethite)-HA-Mn(II) system at pH 5−8. The presence of Mn(II) substantially increased HA adsorption whereas HA greatly impaired the extent and rate of Mn(II) oxidation by O 2 on goethite surfaces. The impacts were more pronounced at higher pH. Mn(II) oxidation produced β-MnOOH, γ-MnOOH, and Mn 3 O 4 which in turn oxidized HA, producing small organic acids. The presence of HA markedly altered the composition of Mn(II) oxidation products by inhibiting the formation of β-MnOOH while favoring the production of γ-MnOOH and Mn(II) adsorbed on the HA-mineral assemblage. Nonconducting γ-Al 2 O 3 exhibited similar but weaker effects than semiconducting goethite in the above processes. Our results suggest that similar to Mn-oxidizing microorganisms, mineral surfaces can drive the coupling of the Mn redox cycle with NOM oxidative degradation under suboxic/oxic and circumneutral/alkaline conditions.

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Section: Introductionmentioning

confidence: 99%

Coupled Manganese Redox Cycling and Organic Carbon Degradation on Mineral Surfaces

Yang

et al. 2020

Environ. Sci. Technol.

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“…In the FMN formed in the Terra rossa of the Yunnan-Guizhou Highlands (Guizhou Province, China), the content of Cd exceeds the background by 268.13 times; Pb -39.46; Cr -11.80; Zn -8.43; Ni -6.16; Cu -3.65 times [39]. In the arable Cutanic Luvisol in the southwestern part of the African continent (Namibia), the FMN accumulate: Cd 6.83; Zn 137; Cu 45; Pb 597 ppm, which is higher than the clarks of these elements [8].…”

Section: электронный научно-производственный журналmentioning

confidence: 99%

“…Ferromanganese nodules (FMN) form in soils of humid landscapes [1][2][3][4]. The FMN contain information about soil processes and geochemistry of elements [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Ecological and geochemical assessment of the content of chemical elements and features of their spatial distribution in Fe nodules of soils in the Middle Cis-Urals

Gorokhova¹,

Васильев²

2022

АЭИ

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This work is about the ecological and geochemical assessment of the elemental chemical composition of soil nodules in the taiga zone of the Middle Cis-Urals. The features of the spatial distribution of chemical elements in concretions of Umbric Albeluvisols Abruptic, Luvic Stagnosols Dystric, and Haplic Fluvisols Oxyaquic are characterized for the first time using atomic absorption spectrometry and scanning electron microscopy with energy-dispersive analysis. A concentric ring structure of nodules with alternating zones rich in Fe and Mn has been revealed. Nodules act as geochemical barriers and accumulate not only iron and manganese, but also Cu, Ni, Co, Zn, and Pb. Keywords: ALBELUVISOLS, STAGNOSOLS, FLUVISOLS, ORTSHTEIN, RORENSTEIN, GEOCHEMISTRY CONSTANTS, ATOMIC ABSORPTION SPECTROMETRY, SEM/EDS, FE AND MN DISTRIBUTION, RING MICROSTRUCTURE

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“…As and Fe in the soil were mostly bound to crystalline oxides (Step 4) and as residual phases (Step 5), which indicated that Fe oxides influenced the retention of As in the soil. In particular, the high total concentration of Fe and the presence of residual Fe (Step 5, 60.1%) indicated that Fe oxides in the soil minerals were associated with phyllosilicates, such as dickite and muscovite, or sulfide minerals [36]. As in the soil is mainly adsorbed by Fe oxides rather than by organic matter [19].…”

Section: Characterization Of the Contaminated Soilmentioning

confidence: 99%

Physical Separation of Contaminated Soil Using a Washing Ejector Based on Hydrodynamic Cavitation

et al. 2021

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A washing ejector is a pre-treatment technology used to remediate contaminated soil by separating fine particles. The washing ejector developed in this study is a device that utilizes fast liquid jets to disperse soil aggregates by cavitation flow. The cavitation phenomenon is affected by the Bernoulli principle, and the liquid pressure decreases with the increase in kinetic energy. The cavitating flow of the fluid through the Ventrui nozzle can remove surface functional groups and discrete particles. The main methodology involves the removal of small particles bound to coarse particles and the dispersion of soil aggregates. Particle collisions occur on the surface soil, such as the metal phase that is weakly bound to silicate minerals. It was observed that the dispersed soil affected the binding of toxic heavy metals and the mineralogical characteristics of the soil. The quantity of oxides, organic matter, and clay minerals affected the properties of the soil. An almost 40–60% removal efficiency of total metals (As, Zn, and Pb) was obtained from the contaminated soils. After treatment by a washing ejector, the volume of fine particles was reduced by 28–47%. When the contaminants are associated with particulates, separation using a washing ejector can be more effective. Therefore, physical separation improves the removal efficiency of heavy metals from soil aggregates.

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Characterization of Fe-Mn concentric nodules from Luvisol irrigated by mine water in a semi-arid agricultural area

Cited by 48 publications

References 36 publications

Coupled Manganese Redox Cycling and Organic Carbon Degradation on Mineral Surfaces

Coupled Manganese Redox Cycling and Organic Carbon Degradation on Mineral Surfaces

Ecological and geochemical assessment of the content of chemical elements and features of their spatial distribution in Fe nodules of soils in the Middle Cis-Urals

Physical Separation of Contaminated Soil Using a Washing Ejector Based on Hydrodynamic Cavitation

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