A5049116197- Groundwater and Isotope Geochemistry
- Heavy metals in environment
- Arsenic contamination and mitigation
- Coal and Its By-products
- Atmospheric and Environmental Gas Dynamics
- Heavy Metal Exposure and Toxicity
- Hydrocarbon exploration and reservoir analysis
- Geochemistry and Geologic Mapping
- Radioactivity and Radon Measurements
- Groundwater flow and contamination studies
- Hydraulic Fracturing and Reservoir Analysis
- Water Quality and Pollution Assessment
- Chromium effects and bioremediation
- Fecal contamination and water quality
- Extraction and Separation Processes
- Mercury impact and mitigation studies
- Water resources management and optimization
- Water Quality and Resources Studies
- Geology and Paleoclimatology Research
- Bone health and osteoporosis research
- Mine drainage and remediation techniques
- Adsorption and biosorption for pollutant removal
- MRI in cancer diagnosis
- Forensic Anthropology and Bioarchaeology Studies
- Trace Elements in Health
New Mexico Institute of Mining and Technology
2024
The Ohio State University
2022-2023
Duke University
2016-2022
Groundwater overexploitation has caused massive groundwater depletion and raised concerns for water food security in India. India also suffers from multiple quality issues such as arsenic fluoride contamination that pose human health risks. Here we report new data showing the occurrence uranium Indian is an emerging widespread phenomenon. We present compiled on 16 states 324 wells of Rajasthan Gujarat show a high prevalence concentrations above World Health Organization provisional guideline...
Hexavalent chromium [Cr(VI)] is a known pulmonary carcinogen. Recent detection of Cr(VI) in drinking water wells North Carolina has raised public concern about contamination by nearby coal ash ponds. Here we report, for the first time, prevalence Cr and from Piedmont region central Carolina, combined with geochemical analysis to determine source elevated levels. We show that predominant species dissolved groundwater levels are found located both near far (>30 km) The characteristics,...
The co-occurrence of contaminants in drinking water may pose enhanced risks to health beyond the effects single contaminants. Here, we investigated four health-relevant redox-sensitive elements (U, As, V, and Cr) 1494 groundwater wells across North Carolina. highest concentrations these were measured mostly from fractured igneous metamorphic formations throughout Piedmont region. Arsenic occurred most frequently suboxic mixed redox character groundwater, whereas U, Cr oxic groundwater....
Hexavalent chromium (Cr(VI)) is known to occur naturally in shallow oxic groundwater, typically from aquifers associated with mafic and ultramafic formations, but information on the occurrence of Cr(VI) deep groundwater large sedimentary basins limited. This study shows that Baiyangdian Lake Basin (BYB), home future second capital city China, had high Cr concentration (>10 μg/L, up 86 μg/L) aquifer (>150 m), while lower (<10 μg/L). Chromium occurred predominantly as (>95%). Shallow was...
Shale gas extraction through hydraulic fracturing and horizontal drilling is increasing in China, particularly Sichuan Basin. Production of unconventional shale with minimal environmental effects requires adequate management wastewater from flowback produced water (FP water) that coextracted natural gas. Here we present, for the first time, inorganic chemistry multiple isotope (oxygen, hydrogen, boron, strontium, radium) data FP 13 wells Lower Silurian Longmaxi Formation Weiyuan field, as...
The implementation of chlorine disinfection in low-income countries reduces the risk waterborne illness but initiates exposure to byproducts (DBPs). Like high-income countries, typically are adopting regulations focusing on trihalomethanes (THM4) as an indicator overall DBP exposure. However, use impaired water sources can decouple formation THM4 from other classes that more potent toxins. documentation species than is rare where may be degraded by inadequate sanitation infrastructure and...
Abstract The Sustainable Development Goals require that 100 mL water samples contain no culturable E. coli to classify a supply as “safely managed” from microbial perspective. But small volume sampling is often insufficient for detecting risks. We used culture-based measures of total coliforms and along with dead-end ultrafiltration (DEUF) droplet digital PCR (ddPCR) assess the quality an urban in Jaipur, India. Despite absence 90% grab ( n = 20) during 10-day period, we detected genes...
Global Li production will require a ∼500 % increase to meet 2050 projected energy storage demands. One potential source is oil and gas wastewater (i.e., produced water or brine), which naturally has high total dissolved solids (TDS) concentrations, that can also be enriched in (>100 mg/L). Understanding the sources mechanisms responsible for naturally-occurring concentrations aid efficient targeting of these brines. The isotopic composition (δ
Significance Rapid groundwater depletion represents a significant threat to food and water security because supplies more than 20% of global use, especially for crop irrigation. A large swath the US High Plains, which produces 50 million tons grain yearly, depends on Ogallala aquifer 90% its irrigation needs. predator–prey-type model serves as minimalist representation use–crop production dynamics. It explains predicts reductions in withdrawal three Plains states subsequent declines...
As the global population ages and proportion of individuals afflicted with musculoskeletal disease spirals upward, there is an increasing interest in understanding preventing bone-related diseases. Bone diseases, such as osteoporosis osteoarthritis, are known to be influenced by a variety factors including age, gender, nutrition, genetics, but also inherently linked human body's ability produce biominerals suitable quality. Because crystal lattice structure mineralogy bone hydroxyapatite...
Coal combustion residuals (CCRs), in particular, coal fly ash, are one of the major industrial solid wastes U.S., and due to their high concentrations toxic elements, they could pose environmental human health risks. Yet detecting ash environment is challenging given its small particle size. Here, we explore utility sensitivity using geochemical indicators (trace Ra nuclides, Pb stable isotopes), combined with physical observation by optical point counting, for presence trace levels...
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