A5068426482- Arsenic contamination and mitigation
- Groundwater and Isotope Geochemistry
- Heavy metals in environment
- Groundwater flow and contamination studies
- Phosphorus and nutrient management
- Heavy Metal Exposure and Toxicity
- Soil and Water Nutrient Dynamics
- Coastal wetland ecosystem dynamics
- Soil Carbon and Nitrogen Dynamics
- Mine drainage and remediation techniques
- Aeolian processes and effects
- Geochemistry and Geologic Mapping
- Water Quality and Pollution Assessment
- Geophysical and Geoelectrical Methods
- Peatlands and Wetlands Ecology
- Surfactants and Colloidal Systems
- Coastal and Marine Dynamics
- Groundwater and Watershed Analysis
- Genetic and Kidney Cyst Diseases
- Fluoride Effects and Removal
- Ionic liquids properties and applications
- Climate change and permafrost
- Microplastics and Plastic Pollution
- Chemical and Physical Properties in Aqueous Solutions
- Atmospheric and Environmental Gas Dynamics
University of Lincoln
2017-2024
University of Manchester
2015-2019
Williams (United Kingdom)
2015-2019
Institute of Chemical Engineering
2016
Diamond Light Source
2015
Deep eutectic solvents (DES) resemble ionic liquids but are formed from an mixture instead of being a single compound. Here we present some results that demonstrate surfactant sodium dodecyl sulfate (SDS) remains surface-active and shows self-assembly phenomena in the most commonly studied DES, choline chloride/urea. X-ray reflectivity (XRR) small angle neutron scattering (SANS) suggest behavior is significantly different water. Our SANS data supports our determination critical micelle...
Large river systems, such as the River Ganges (Ganga), provide crucial water resources for environment and society, yet often face significant challenges associated with cumulative impacts arising from upstream environmental anthropogenic influences. Understanding complex dynamics of systems remains a major challenge, especially given accelerating stressors including climate change urbanization, due to limitations in data process understanding across scales. An integrated approach is...
Organic matter in the environment is involved many biogeochemical processes, including mobilization of geogenic trace elements, such as arsenic, into groundwater. In this paper we present use fluorescence spectroscopy to characterize dissolved organic (DOM) pool heavily arsenic-affected groundwaters Kandal Province, Cambodia. The DOM (fDOM) characteristics between contrasting field areas differing dominant lithologies were compared and linked other hydrogeochemical parameters, arsenic...
Abstract Sub-Saharan Africa must urgently improve food security. Phosphorus availability is one of the major barriers to this due low historical agricultural use. Shared socioeconomic pathways (SSPs) indicate that only a sustainable (SSP1) or fossil fuelled future (SSP5) can security (in terms price, availability, and risk hunger) whilst nationalistic (SSP3) unequal (SSP4) worsen Furthermore, SSP1 requires limited cropland expansion phosphorus use SSP3 as environmentally damaging pathway....
Arsenic contamination of groundwaters in South and Southeast Asia is a major threat to public health. In order better understand the geochemical controls on mobility arsenic heavily arsenic-affected aquifer northern Kandal Province, Cambodia, key changes inorganic aqueous geochemistry have been monitored at high vertical lateral resolution along dominant groundwater flow paths two distinct transects. The transects are characterized by differing geochemical, hydrological lithological...
Millions of people globally, and particularly in South Southeast Asia, face chronic exposure to arsenic from reducing groundwaters which. Arsenic release is widely attributed largely reductive dissolution arsenic-bearing iron minerals, driven by metal bacteria using bioavailable organic matter as an electron donor. However, the nature implicated mobilization, location within subsurface where these processes occur, remains debated. In a high resolution study pristine, shallow aquifer Kandal...
Natural arsenic (As) contamination of groundwater which provides drinking water and/or irrigation supplies remains a major public health issue, particularly in South and Southeast Asia. A number studies have evaluated various aspects the biogeochemical controls on As mobilization aquifers typical to this region, however many are predicated assumption that key processes may be deduced by sampled chemistry. The validity has not been clearly established even though role sorption/desorption...
Abstract The Fens is a region that contributes 11% of the agri-food economy from just 4% agricultural land covering England (UK). This vulnerable to soil salinisation sea-level rise with estimated 100-year flood events projected be observed up every 2 years by 2100. Seawater intrusion and upwelling saline groundwater can provide an additional pathway; however, area’s has not been assessed risk unknown. study used data British Geological Survey’s stratigraphic core archive produce first map...
Drilling is widely used in groundwater monitoring and many other applications but has the inherent problem of introducing some degree external contamination into natural systems being monitored. Contamination from drilling fluid particularly problematic for (i) wells with relatively low water flow rates which are difficult to flush; (ii) hydrogeochemical research studies groundwaters hosted by incompletely consolidated shallow sediments, utilized as sources drinking irrigation across parts...
The poisoning of rural populations in South and Southeast Asia due to high groundwater arsenic concentrations is one the world's largest ongoing natural disasters. It important consider environmental processes related release geogenic arsenic, including geomorphological organic geochemical processes. Arsenic released from sediments when iron-oxide minerals, onto which adsorbed or incorporated, react with carbon (OC) OC oxidised. In this study we build a new framework for Kandal Province,...
Abstract Phosphorus (P) is a finite resource and critical to plant growth therefore food security. Regional‐ continental‐scale studies propose how much P would be required feed the world by 2050. These indicate that Sub‐Saharan Africa soils have highest soil deficit globally. However, spatial heterogeneity of caused heterogeneous chemistry in continental scale has never been addressed. We provide combination broadly adopted P‐sorption model integrated into highly influential, large‐scale...
Arsenic (As) contamination of groundwaters in South and Southeast Asia is a major threat to public health these areas. Understanding the source age critically important understanding controls on As mobilization aquifers. Using tritium (3H) noble gas (He Ne) signatures, model groundwater ages dominant hydrological were identified transect oriented broadly parallel inferred flowpaths Kandal Province, Cambodia lower Mekong Basin. Apparent 3H-3He showed that most are modern (< 55 years),...
By 2050 the global population will be 9.7 billion, placing an unprecedented burden on world's soils to produce extremely high food yields. Phosphorus (P) is crucial plant growth and mineral fertilizer added soil maintain P concentrations, however this a finite resource, thus efficient use critical. Plants primarily uptake from labile (available) pool not stable solid phase; transfer between these pools limits bioavailability. Transfer controlled by properties which vary types. The dynamic...
The model radiocarbon age of inorganic carbon (IC) in groundwater is a key parameter for understanding chemical history and physical parameters such as residence times flow rates. Current interpretations are based on the principle that bulk IC derives from multiple sources oxidation organic (OC), carbonate dissolution, soil zone processes well rainwater. Using this principle, adjustment methods have been developed to calculate rainwater-related recharge ages. Of further interest, however,...
Tidal wetlands sequester around ~4.8-87.2 Tg of carbon per year1 and represent approximately 25% the global sink, as a result high inputs organic matter slow below-ground decomposition. The rate storage is hypothesised to be linked composition, particularly relative oxidation, soil relationship with sediment mineral matrix. complex dynamic biogeochemical processes governing tidal wetland are not yet fully understood therefore, aim this research was understand how composition material varies...