A5103144589- Geochemistry and Elemental Analysis
- Radioactive element chemistry and processing
- Microbial Fuel Cells and Bioremediation
- Clay minerals and soil interactions
- Hydrocarbon exploration and reservoir analysis
- Environmental remediation with nanomaterials
- CO2 Sequestration and Geologic Interactions
- Petroleum Processing and Analysis
- Arsenic contamination and mitigation
- Coal and Its By-products
- Groundwater and Isotope Geochemistry
- Advanced oxidation water treatment
- Enhanced Oil Recovery Techniques
- Radioactivity and Radon Measurements
China University of Geosciences (Beijing)
2021-2024
The redox activity of Fe-bearing minerals is coupled with the transformation organic matter (OM) in dynamic environments, but underlying mechanism remains unclear. In this work, a Fe cycling experiment nontronite (NAu-2), an Fe-rich smectite, was performed via combined abiotic and biotic methods, accompanying humic acid (HA) as representative OM investigated. Chemical reduction subsequent reoxidation NAu-2 produced abundant hydroxyl radicals (thereafter termed ·OH) that effectively...
Abstract Studies have shown the electron shuttling role of humic substances (HS) in enhancing microbial reduction solid-phase Fe(III), but it is unknown if native HS can reduce structural Fe(III) clays and how their chemical properties affect this process secondary mineralization. The objective study was to evaluate natural HS, Leonardite acid (LHA), Pahokee Peat (PPHA) reducing nontronite with or without Shewanella putrefaciens. extent determined a wet method. Electrochemical methods,...
Biogeochemical redox cycling of iron (Fe) essentially governs various geochemical processes in nature. However, the mechanistic underpinnings Fe-redox deep-sea sediments remain poorly understood, due to limited access environment. Here, abyssal sediment collected from a depth 5800 m Pacific Ocean was characterized for its elemental, mineralogical, and biological properties. The sedimentary environment determined be oligotrophic with nutrition, yet contained considerable amount trace...
Widespread Fe-bearing clay minerals are potential materials capable of reducing and immobilizing U(VI). However, the kinetics this process impact environmental factors remain unclear. Herein, we investigated U(VI) reduction by chemically reduced nontronite (rNAu-2) in presence EDTA bicarbonate. was completely within 192 h rNAu-2 alone, higher Fe(II) resulted a rate. NaHCO