A5031365478- Plant Toxicity and Pharmacological Properties
- Iron oxide chemistry and applications
- Pesticide and Herbicide Environmental Studies
- Soil and Water Nutrient Dynamics
- Layered Double Hydroxides Synthesis and Applications
- Phosphorus and nutrient management
- Environmental remediation with nanomaterials
- Heavy metals in environment
- Clay minerals and soil interactions
- Adsorption and biosorption for pollutant removal
- Pharmaceutical and Antibiotic Environmental Impacts
- Soil and Unsaturated Flow
- Arsenic contamination and mitigation
- Radioactive element chemistry and processing
- Advanced oxidation water treatment
- Mine drainage and remediation techniques
- Environmental Toxicology and Ecotoxicology
- Genomics, phytochemicals, and oxidative stress
- Cassava research and cyanide
- Groundwater flow and contamination studies
- Geochemistry and Elemental Analysis
- Peatlands and Wetlands Ecology
- Allelopathy and phytotoxic interactions
- Nanomaterials for catalytic reactions
- Plant and fungal interactions
University of Copenhagen
2016-2025
University of Bergen
2025
Senter for Krisepsykologi
2025
University College Copenhagen
2020-2024
Sino-Danish Centre for Education and Research
2012-2023
University of Chinese Academy of Sciences
2019-2022
Planta
2017-2020
Centre de Nanosciences et de Nanotechnologies
2020
University Hospital Schleswig-Holstein
2019
University of Lübeck
2019
Leaching of nitrate from soils and sediments can be reduced in anoxic environments due to denitrification N2O/N2 or reduction ammonium. While microbial dissimilatory ammonia is well known, it shown here that this conversion also proceed at appreciable rates abiotic systems the presence green rust compounds [FeII4FeIII2(OH)12SO4·yH2O]. In reaction stoichiometrically ammonium, magnetite (Fe3O4) sole Fe-containing product. At a constant pH approximately 8.25 25 °C, rate expression given as:...
The reductive dechlorination of CCl4 and CHCl3 in the presence synthetic sulfate form green rust (GRSO4), FeII4FeIII2(OH)12SO4yH2O, at pH ∼ 8 room temperature was investigated. Reduction produces C2Cl6 as main chloroaliphatic products, while GRSO4 is oxidized to magnetite (Fe3O4). formation indicates a coupling reaction between trichloromethyl radicals suspension. Chloroform much less susceptible than by showing reduction rates approximately 100 times for CCl4. transformation can be...
Recirculation of wood ash from energy production to forest soil improves the sustainability this form as recycled contains nutrients that otherwise would be lost at harvest. In addition, wood-ash is beneficial many soils due its inherent acid-neutralizing capabilities. However, has several ecosystem-perturbing effects like increased pH and pore water electrical conductivity both known strongly impact bacterial numbers community composition. Studies investigating responses application remain...
Abstract The chemical composition of the pyroaurite-type compound Fe(II)Fe(III) hydroxy-carbonate (‘green rust’) synthesised from freshly precipitated ferrihydrite and Fe(II) chloride solution at pH 7.0 (‘induced hydrolysis’) was determined. nearly stoichiometric, with formula Fe(II):Fe(III) ratio being independent in initial reaction mixture. It shows all XRD peaks reported for this compound. Visible-near IR a broad peak 650 nm which is ascribable to intervalence charge transfer therefore...
ABSTRACT The pH‐dependent release of cadmium, copper, and lead from soil materials was studied by use a stirred flow cell to quantify their rates, evaluate the method as test for bonding strength potential mobility heavy metals in soils. Soil sludge‐amended nonamended A horizons Thai coarse‐textured Kandiustult Danish loamy Hapludalf were characterized tested. For each sample, experiments with steady state pH values range 2.9 7.1 duration 7 d performed. effluent continuously collected...
ABSTRACT The tcr gene cluster mediates in vitro copper resistance Enterococcus faecium . Here we describe the selection of -mediated E. an animal feeding experiment with young pigs fed 175 mg copper/kg feed (ppm), which is concentration commonly used for piglets European pig production. was not selected a control group low levels (6 ppm). We also show coselection macrolide- and glycopeptide-resistant high level copper. Finally, identify genes enterococcal species mundtii , casseliflavus...
Layered iron oxide nanosheet material is a new efficient adsorbent which here developed and investigated for removing eutrophication pollutant phosphate from water.
Layered iron(II)–iron(III) hydroxides [green rusts (GRs)] constitute fast reductants for chlorinated methanes, but most studies of the reaction GRs with ethylenes (CEs) have reported little or no reduction. In this work, we demonstrate that bone char (BC) can eliminate kinetic hindrance dehalogenation CEs by GR. Dechlorination perchloroethylene (PCE), trichloroethylene (TCE), cis-dichloroethylene, and trans-dichloroethylene (∼10 μM in aqueous phase) GR/BC mixtures (∼3.2 g/L GR 0.15 BC)...
Biochars function as electron transfer mediators and thus catalyze redox transformations of environmental pollutants. A previous study has shown that bone char (BC) high catalytic activity for reduction chlorinated ethylenes using layered Fe(II)–Fe(III) hydroxide (green rust) reductant. In the present study, we studied rate trichloroethylene (TCE) by green rust in presence BCs obtained at pyrolysis temperatures (PTs) from 450 to 1050 °C. The reactivity increased with PT, yielding a maximum...
Summary The rate at which minerals in the soil weather is affected by pH and concentration of organic solutes (DOC). rates release Al, Ca, Fe, K, Mg, Na, P Si from a mineral sample to solutions natural HCI (control) were determined 3 4 for up 17 weeks. Soil collected centrifuging materials O horizons various types under four tree species (spruce, birch, oak, beech) passed through cation‐exchange resin yield H + ‐saturated solutes. acceleration elements' was shown directly relative ligand...
Abstract Iron(II)-containing minerals are potential inorganic nitrate reductants in soils and sediments. Specifically, synthetic green rust (Fe 4 II Fe III 2 (OH) 12 SO . y H O, GR) reduces to ammonium. The reaction of GR with two different salts, NaNO 3 Ba(NO ) , has been compared. stoichiometry the order respect Fe(II) does not change examined temperature range (15-50°C) irrespective salt used. Activation energies 83.9±7.6 kJ mol -1 90.5±6.9 have determined for respectively. However,...
ABSTRACT The tfdA gene is known to be involved in the first step of degradation phenoxy acid herbicide 4-chloro-2-methylphenoxyacetic (MCPA) several soil bacteria, but bacteria containing other -like genes have been isolated as well. A quantitative real-time PCR method was used monitor increase concentration during MCPA sandy topsoil and subsoil over a period 115 days. Quantitative revealed growth -containing bacterial community, from 500 g −1 approximately 3 × 10 4 7 5 for initially added...