An evolving view on biogeochemical cycling of iron

Nature Reviews Microbiology, Год журнала: 2021, Номер 19(6), С. 360 - 374

Опубликована: Фев. 1, 2021

Язык: Английский

---

Iron plaque formation and its effect on key elements cycling in constructed wetlands: Functions and outlooks

Water Research, Год журнала: 2023, Номер 235, С. 119837 - 119837

Опубликована: Март 6, 2023

Язык: Английский

---

Active Iron Phases Regulate the Abiotic Transformation of Organic Carbon during Redox Fluctuation Cycles of Paddy Soil

Environmental Science & Technology, Год журнала: 2021, Номер 55(20), С. 14281 - 14293

Опубликована: Окт. 8, 2021

Iron (Fe) phases are tightly linked to the preservation rather than loss of organic carbon (OC) in soil; however, during redox fluctuations, OC may be lost due Fe phase-mediated abiotic processes. This study examined role driving hydroxyl radical (•OH) formation and transformation cycles paddy soils. Chemical probes, sequential extraction, Mössbauer analyses showed that active species, such as exchangeable surface-bound low-crystalline minerals (e.g., green rust-like phases), predominantly regulated •OH cycles. The oxidation strongly induced oxidative OC, which accounted for 15.1–30.8% CO2 production oxygenation. Microbial processes contributed 7.3–12.1% production, estimated by chemical quenching γ-irradiation experiments. After five cycles, 30.1–71.9% associated with species was released, whereas 5.2–7.1% stabilized high-crystalline irreversible these Collectively, our findings might unveil under-appreciated more conservation soil fluctuation events.

Язык: Английский

---

Unraveling influences of nitrogen cycling on arsenic enrichment in groundwater from the Hetao Basin using geochemical and multi-isotopic approaches

Journal of Hydrology, Год журнала: 2021, Номер 595, С. 125981 - 125981

Опубликована: Янв. 19, 2021

Язык: Английский

---

Unraveling roles of dissolved organic matter in high arsenic groundwater based on molecular and optical signatures

Journal of Hazardous Materials, Год журнала: 2020, Номер 406, С. 124702 - 124702

Опубликована: Ноя. 28, 2020

Язык: Английский

---

Autotrophic denitrification using Fe(II) as an electron donor: A novel prospective denitrification process

The Science of The Total Environment, Год журнала: 2022, Номер 858, С. 159721 - 159721

Опубликована: Окт. 25, 2022

Язык: Английский

---

Dissolved Organic Matter Sources in High Arsenic Groundwater From a Sand‐Gravel Confined Aquifer

Journal of Geophysical Research Biogeosciences, Год журнала: 2023, Номер 128(2)

Опубликована: Фев. 1, 2023

Abstract Sources of dissolved organic matter (DOM) triggering arsenic enrichment in deep confined groundwater is a highly debated issue. Along these lines, the spectroscopic and molecular characteristics DOM were monitored both shallow unconfined from Songnen Basin, China. Results demonstrated that with higher concentrations was characterized by more abundant labile compounds than groundwater. The three‐end‐member mixing model estimated had fraction surface water, while primarily recharged lateral flow. Groundwater sources fluorescence index (FI) values, which suggests sourced water stronger terrestrial signatures. However, mainly situ sedimentary release or by‐products microbial activity Higher values degradation (I_deg) indicate undergone greater extents one. anoxic environments occurred via pathway where saturated low‐molecular‐mass preferentially degraded to produce mid‐molecular‐mass unsaturated, aromatic, This explained significant positive correlations between FI I_deg values. A state conducive work successfully identified distinct DOM, proposed paradigm processing pathways during under environments.

Язык: Английский

---

The interplay between microalgae and toxic metal(loid)s: mechanisms and implications in AMD phycoremediation coupled with Fe/Mn mineralization

Journal of Hazardous Materials, Год журнала: 2023, Номер 454, С. 131498 - 131498

Опубликована: Апрель 26, 2023

Язык: Английский

---

High arsenic pollution of the eutrophic Lake Taihu and its relationship with iron, manganese, and dissolved organic matter: High-resolution synchronous analysis

Journal of Hazardous Materials, Год журнала: 2024, Номер 467, С. 133644 - 133644

Опубликована: Янв. 29, 2024

Язык: Английский

---

Ammonium-Enhanced Arsenic Mobilization from Aquifer Sediments

Environmental Science & Technology, Год журнала: 2024, Номер unknown

Опубликована: Фев. 5, 2024

Ammonium-related pathways are important for groundwater arsenic (As) enrichment, especially via microbial Fe(III) reduction coupled with anaerobic ammonium oxidation; however, the key (and microorganisms) underpinning ammonium-induced and their contributions to As mobilization in still unknown. To address this gap, aquifer sediments hosting high from western Hetao Basin were incubated 15N-labeled external organic carbon sources (including glucose, lactate, lactate/acetate). Decreases concentrations positively correlated increases total produced Fe(II) (Fe(II)tot) released As. The molar ratios of Fe(II)tot oxidized ranged 3.1 3.7 all incubations, δ15N values N2 headspace increased ammonium-treated series, suggesting as end product oxidation. addition release by 16.1% 49.6%, which was more pronounced when copresented electron donors. Genome-resolved metagenomic analyses (326 good-quality MAGs) suggested that system required syntrophic metabolic interactions between bacterial archaeal current results highlight significance ammonium-stimulated driving mobilization, is underestimated groundwater.

Язык: Английский

---