A5031774943- Heavy metals in environment
- Environmental Toxicology and Ecotoxicology
- Mine drainage and remediation techniques
- Water Quality and Pollution Assessment
- Nanoparticles: synthesis and applications
- Geochemistry and Geologic Mapping
- Soil and Water Nutrient Dynamics
- Radioactive element chemistry and processing
- Groundwater and Isotope Geochemistry
- Peatlands and Wetlands Ecology
- Geochemistry and Elemental Analysis
- Radioactive contamination and transfer
- Microplastics and Plastic Pollution
- Radioactivity and Radon Measurements
- Mercury impact and mitigation studies
- Pesticide and Herbicide Environmental Studies
- Water Quality Monitoring and Analysis
- Soil Carbon and Nitrogen Dynamics
- Marine and coastal ecosystems
- Pharmaceutical and Antibiotic Environmental Impacts
- Clay minerals and soil interactions
- Environmental and Social Impact Assessments
- Electrochemical Analysis and Applications
- Soil erosion and sediment transport
- Coal and Its By-products
UK Centre for Ecology & Hydrology
2015-2024
Lancaster University
2007-2024
University of Bologna
2024
Lancaster City Council
2016-2020
HR Wallingford
2018
Natural Environment Research Council
2007-2017
University of Lisbon
2016
Norwegian University of Life Sciences
2007
Wageningen University & Research
2005
Freshwater Biological Association
1998-2002
The complexation of heavy metals with dissolved organic matter (DOM) in the environment influences solubility and mobility these metals. In this paper, we measured Cu, Cd, Zn, Ni, Pb DOM soil solution at pH 3.7−6.1 using a Donnan membrane technique. results show that DOM-complexed species is generally more significant for Cu than Ni. ability two advanced models ion binding to humic substances, e.g., model VI NICA-Donnan, simulation metal natural was assessed by comparing predictions...
Environmental contextNatural organic matter exerts a powerful control on chemical conditions in waters and soils, affecting pH influencing the biological availability, transport retention of metals. To quantify reactions, we collated wealth laboratory data covering 40 metals acid–base used them to parameterise latest series Humic Ion-Binding Models. Model VII is now available interpret field data, contribute prediction environmental chemistry. AbstractHumic aims predict competitive reactions...
We present a method to calculate critical limits of cationic heavy metals accounting for variations in soil chemistry. assume the free metal ion concentration (Mfree) be most appropriate indicator toxicity, combined with protective effect cations (e.g., H+, Ca2+). Because tend covary pH, Mfree exerting given level toxic (Mfree,toxic) can expressed as function pH alone. use linear regression equations derive Mfree,toxic toxicity experiments from organic matter content, and endpoint metal....
Environmental contextThe chemical speciation of metals in waters is great importance determining their transport, fate and effects the environment. Modelling valuable for making predictions about these effects. Here a model metal tested against field data, recommendations are made as to how both measurements might be improved future. AbstractA key question evaluation models is: well do compare measurements? To address this issue, performance WHAM/Model VII predicting free ion concentrations...
To determine how soil properties influence nanoparticle (NP) fate, bioavailability and toxicity, this study compared the toxicity of nano zinc oxide (ZnO NPs), non-nano ZnO ionic ZnCl2 to earthworm Eisenia fetida in a natural at three pH levels. NP characterisation indicated that reaction with media greatly controls properties. Three main conclusions were drawn. First Zn especially for reproduction, was influenced by all forms. This can be linked on dissolution. Secondly, bioaccumulation...
Rising concentrations of atmospheric carbon dioxide are causing acidification the oceans. This results in changes to key chemical species such as hydroxide, carbonate and bicarbonate ions. These will affect distribution different forms trace metals. Using IPCC data for pCO2 pH under four future emissions scenarios (to year 2100) we use a speciation model predict organic inorganic Under scenario where peak after 2100, predicted free ion Al, Fe, Cu, Pb increase by factors up approximately 21,...
Metabolic profiling can be used to assess the changes in biochemical profiles of soil communities living contaminated sites. The term "community metabolomics" is proposed for application metabolomics techniques study entire community a sample. authors anticipate present starting point use this technique how respond factors such as pollution and climate change.
To assess the influence of soil properties and aging on availability toxicity zinc (Zn) applied as nanoparticles (Zn oxide [ZnO]-NPs) or Zn2+ ions chloride [ZnCl2 ]), 3 natural soils were individually spiked with either ZnO-NPs ZnCl2 incubated for up to 6 mo. Available Zn concentrations in measured by porewater extraction (ZnPW), whereas earthworms (Eisenia andrei) exposed study bioavailability. Porewater lower when was NPs compared ionic form decreased increasing pH. For both forms Zn-PW...
The effect of soil pH on the toxicity 30 nm ZnO to Folsomia candida was assessed in Dorset field soils with pHCaCl2 adjusted 4.31, 5.71, and 6.39. To unravel contribution particle size dissolved Zn, 200 ZnCl2 were tested. Zinc sorption increased increasing pH, Freundlich kf values ranged from 98.9 (L/kg)(1/n) 333 for 64.3 187 ZnCl2. No found sorption, little difference between ZnO. reproduction decreased all Zn forms, 28-d median effective concentrations (EC50s) 553 mg Zn/kg, 1481 3233 Zn/kg...
Quantification of the uptake and elimination nanomaterials (NMs) by organisms is key in assessing environmental risks NMs.
As the pressure to take action against global warming is growing in urgency, scenarios that incorporate multiple social, economic and environmental drivers become increasingly critical support governments other stakeholders planning climate change mitigation or adaptation actions. This has led recent explosion of future scenario analyses at scales, further accelerated since development Intergovernmental Panel on Climate Change (IPCC) research community Shared Socioeconomic Pathways (SSPs)...