A5013745150- Arsenic contamination and mitigation
- Groundwater and Isotope Geochemistry
- Water Quality and Pollution Assessment
- Heavy metals in environment
- Mine drainage and remediation techniques
- Membrane Separation Technologies
- Heavy Metal Exposure and Toxicity
- Membrane-based Ion Separation Techniques
- Groundwater flow and contamination studies
- Groundwater and Watershed Analysis
- Geochemistry and Geologic Mapping
- Fluoride Effects and Removal
- Nanopore and Nanochannel Transport Studies
- Pharmaceutical and Antibiotic Environmental Impacts
- Geophysical and Geoelectrical Methods
- Water Treatment and Disinfection
- Iron oxide chemistry and applications
- Mercury impact and mitigation studies
- Atmospheric and Environmental Gas Dynamics
- Microbial Community Ecology and Physiology
- Urban and Freight Transport Logistics
- Solar-Powered Water Purification Methods
- Marine Bivalve and Aquaculture Studies
- Environmental and Social Impact Assessments
- Environmental and Cultural Studies in Latin America and Beyond
University of Manchester
2015-2025
Williams (United Kingdom)
2015-2025
Monash University
2024
Cambridge Systematics (United States)
2019
Environmental Earth Sciences
2017
Children's Cancer Institute Australia
2017
Gold Coast City Council
2016
Heriot-Watt University
2009-2013
University of Edinburgh
2010-2013
University of Colorado Boulder
2007
Abstract The transport of hydrated ions through narrow pores is important for a number processes such as the desalination and filtration water conductance biological channels. Here, molecular dynamics simulations are used to systematically examine anionic drinking contaminants (fluoride, chloride, nitrate, nitrite) ranging in effective radius from 2.8 6.5 Å elucidate role hydration excluding these species during nanofiltration. Bulk properties (hydrated size coordination number) determined...
Environmentally relevant contaminants fluoride, chloride, nitrate, and nitrite face Arrhenius energy barriers during transport through nanofiltration (NF) membranes. The were quantified using crossflow filtration experiments in the range of 7-17 kcal·mol(-1), according to ion type membrane (Filmtec NF90 NF270). Fluoride faced a comparatively high barrier for both This can be explained by strong hydration fluoride rather than other properties such as bare radius, fully hydrated Stokes...
Myelodysplastic syndromes and chronic myelomonocytic leukemia are blood disorders characterized by ineffective hematopoiesis progressive marrow failure that can transform into acute leukemia. The DNA methyltransferase inhibitor 5-azacytidine (AZA) is the most effective pharmacological option, but only ∼50% of patients respond. A response manifests after many months treatment transient. reasons underlying AZA resistance unknown, few alternatives exist for non-responders. Here, we show...
The presence and distribution of emerging organic contaminants (EOCs) in freshwater environments is a key issue India globally, particularly due to ecotoxicological potential antimicrobial resistance concerns. Here we have investigated the composition spatial EOCs surface water along ∼500 km segment iconic River Ganges (Ganga) tributaries middle Gangetic Plain Northern India. Using broad screening approach, 11 samples, identified 51 EOCs, comprising pharmaceuticals, agrochemicals, lifestyle...
Aquatic pollution from emerging organic contaminants (EOCs) is of key environmental importance in India and globally, particularly due to concerns antimicrobial resistance, ecotoxicity drinking water supply vulnerability. Here, using a broad screening approach, we characterize the composition distribution EOCs groundwater Gangetic Plain around Patna (Bihar), as an exemplar rapidly developing urban area northern India. A total 73 were detected 51 samples, typically at ng.L−1 low μg.L−1...
Chronic exposure to groundwater containing elevated concentrations of geogenic contaminants such as arsenic (As) and uranium (U) can lead detrimental health impacts. In this study, we have undertaken a survey representative sites across all districts the State Bihar, in Middle Gangetic Plain north-eastern India. The aim is characterize inorganic major trace element aqueous geochemistry sources widely used for drinking with particular focus on spatial distribution associated geochemical...
The transport of anionic drinking water contaminants (fluoride, chloride, nitrate and nitrite) through narrow pores ranging in effective radius from 2.5 to 6.5 Å was systematically evaluated using molecular dynamics simulations elucidate the magnitude origin energetic barriers encountered nanofiltration. Free energy profiles for ion show that depend on pore size properties there are three key regimes affect transport. first is where can fit with its full inner hydration shell, second between...
Despite being rich in water resources, many areas of South East Asia face difficulties securing clean supply. This is particularly problematic regions with a rapidly growing population. In this study, the spatial variability thickness clay layer, controlling surface – groundwater interactions that affect aquifer vulnerability, was investigated using electrical resistivity tomography (ERT). Data were acquired along two transects, showing significant differences imaged resistivities. Borehole...
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...
Global usage of pharmaceuticals has led to the proliferation bacteria that are resistant antimicrobial treatments, creating a substantial public health challenge. Here, we investigate emergence sulfonamide resistance genes in groundwater and surface water Patna, rapidly developing city Bihar, India. We report first quantification three (sulI, sulII sulIII) (12-107 m depth) The mean relative abundance gene copies was found be sulI (2.4 × 10
The Ganga River (known internationally as the Ganges) is one of world's most prominent rivers, running from Himalayas to Bay Bengal and supporting livelihoods > 40 % India's 1.4 billion population. regionally globally important, agriculture industry, yet faces potentially detrimental water quality challenges arising runoff discharge increasing urbanization, industry agriculture. A ∼ 2700 km longitudinal survey nutrient microbial quality, including phytoplankton composition, was undertaken in...
Groundwater sustains about 75% of Uganda’s population, especially in rural and peri-urban areas [1,2]. While recent progress has been made to understand groundwater quality at the time drilling [3], baseline hydrogeochemical characteristics operational community drinking water sources remain poorly understood, further complicated by potential surface-groundwater interactions [4]. This study assesses variations major chemistry geochemical controls across five distinct...
Aquatic pollution from emerging contaminants, including antibiotics and antimicrobial resistance (AMR) genes, is an important environmental concern particularly pertinent in megacities such as Bangkok, Thailand, impacted by rapid urbanization massive water demand.  Using a suite of hydrogeochemical tracers inorganics organics, nutrients, metal(loids), select AMR genes [1, 2], we characterize the distribution spatial patterns range contaminants ~ 150 km transect Chao Phraya River...
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...
Myanmar, in Southeast Asia, is categorized as a Least Developed Country, facing substantial challenges towards meeting 2030 Sustainable Development Goal targets, including ensuring access to safe water and sanitation. The occurrence of geogenic contaminants, notably arsenic, Myanmar groundwaters relatively poorly understood, particularly compared other countries South/Southeast Asia. Improving the understanding groundwater quality hence major concern relevant health millions local...
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...