Groundwater nitrate (NO) pollution has attracted widespread attention; however, accurately evaluating the sources of NO and their contribution patterns in regional groundwater is difficult in areas with multiple sources and complex hydrogeological conditions. In this study, 161 groundwater samples were collected from the Poyang Lake Basin for hydrochemical and dual NO isotope analyses to explore the sources of NO and their spatial contribution using the Positive Matrix Factorization (PMF) and Bayesian stable isotope mixing (MixSIAR) models. The results revealed that the enrichment of NO in groundwater was primarily attributed to sewage/manure (SM), which accounted for more than 50 %. The contributions of nitrogen fertilizer and soil organic nitrogen should also be considered. Groundwater NO sources showed obvious spatial differences in contributions. Regions with large contributions of SM (>90 %) were located in the southeastern part of the study area and downstream of Nanchang, which are areas with relatively high population density. Nitrogen fertilizer and soil organic nitrogen showed concentrated contributions in paddy soil in the lower reaches of the Gan and Rao Rivers, and these accumulations were mainly driven by the soil type, land use type, and topography. This study provides insight into groundwater NO contamination on a regional scale.
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http://dx.doi.org/10.1016/j.jhazmat.2022.130569 | DOI Listing |
Environ Sci Pollut Res Int
January 2025
Earth Sciences, Engineering Faculty, Autonomous University of San Luis Potosi, Av. Manuel Nava 8, San Luis Potosí, SLP, Mexico.
Ecosystems such as wetlands have karst groundwater as their primary source of preserving their services and functions. Karst systems are complex hydrogeological systems that are difficult to study because of their complicated functioning mechanism, which requires an interdisciplinary effort based on hydrodynamic assessment and characterization of the hydrogeology of the system. The study area is the Ramsar wetland Ciénaga de Tamasopo (Mexico), which is dependent on the discharge of karst groundwater that is affected by water extraction of extensive sugarcane agriculture and is also the main water source for the rural towns.
View Article and Find Full Text PDFEnviron Pollut
January 2025
114 Geological Brigade of Guizhou Geological and Mineral Exploration and Development Bureau, Zunyi, 563000, China; Karst Water Resources and Environment Academician Workstation of Guizhou Province, Zunyi 563000, China.
Sudden groundwater pollution in karst areas poses a serious threat to drinking water safety. Tracing contamination sources is crucial for managing and remediating groundwater pollution. Traditional tracing methods often lack accuracy, so this study combined multiple techniques to trace and quantify pollution sources near the municipal solid waste (MSW) landfill in Zunyi City, Guizhou Province, China.
View Article and Find Full Text PDFScientificWorldJournal
January 2025
Department of Forestry and Climate Change, Injibara University, Injbara, Ethiopia.
was first introduced to Ethiopia in the late 19 century to address the scarcity of firewood and construction wood in the capital city. Since then, it has spread across the country and has become an important source of income for many households while also reducing the need for deforestation. Despite concerns raised by environmentalists about its eco-hydrological impact, the plantation has expanded to cover a vast area of the nation, including farmlands and mountainous regions.
View Article and Find Full Text PDFEnviron Pollut
January 2025
State Key Laboratory of Biogeology and Environmental Geology & School of Environmental Studies, China University of Geosciences, Wuhan, Hubei 430074, PR China.
Elevated concentrations of antimony (Sb) in the environment originating from natural and anthropogenic sources are of global concern due to their high toxicity and mobility. Notably, the formation of thioantimony species (e.g.
View Article and Find Full Text PDFEnviron Res
January 2025
Zijin School of Geology and Mining, Fuzhou University, Fuzhou, 350108, China; State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, 430071, China. Electronic address:
The migration and immobilization of heavy metals in soil and groundwater pose significant environmental challenges, particularly in the context of Cr(VI), a highly toxic and mobile contaminant. Self-hardening slurry materials, commonly used for trench cutoff walls, have gained great attention due to their potential for pollutant containment. However, the relationship between their adsorption properties and pollutant diffusion behaviors remains poorly understood.
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