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Characteristics and environmental significance of sulfur isotope signatures in the water environment of typical pyrite mines.
J Environ Sci (China)
July 2025
Geology Institute of China Chemical Geology and Mine Bureau, Beijing 100101, China; Technology Innovation Center for Ecological Restoration Engineering in Mining Area, Ministry of Natural Resources, Beijing 100083, China.
Contaminants in the water environment of different pyrite mines have varying characteristics due to different geological origins. Sulfur isotope (δS) is an effective tool to reveal the mechanism of water environment contamination, but no investigations have yet analyzed the characteristics and environmental significance of the δS in the water environment of different pyrite mines. This study involved a field investigation of four typical pyrite mines in China (representing volcanic, skarn, sedimentary-metamorphic, and coal-deposited types) and the analysis of the hydrochemistry of aqueous samples and the δS of both pyrite and dissolved sulfates.
View Article and Find Full Text PDFHydrochemical facies distribution, controlling mechanisms and natural background concentrations of major pollutants in Ganga-Yamuna interfluve aquifer, India.
Environ Pollut
January 2025
Department of Geology, Aligarh Muslim University, Aligarh, India.
Evolution of groundwater genesis in Central Ganga Plain (CGP) is scrutinized with due consideration of hydrochemical and hydrodynamic environment within Quaternary alluviums. Wide variation in hydrochemical facies in CGP indicates a dynamic hydro-geochemical environment influenced from the seasonal rainfall, return flows, canal seepages, and anthropogenic activities. The Ca-HCO facies retaining meteoric nature is characterized by shallow water levels, high recharge rate, high hydraulic conductivity, low salinity and trace elemental load.
View Article and Find Full Text PDFProcess-based quantitative description of carbon biogeochemical cycle in a reclaimed water intake area.
Environ Res
December 2024
State Key Laboratory of Nuclear Resources and Environment, Fundamental Science on Radioactive Geology and Exploration Technology Laboratory, Jiangxi Provincial Key Laboratory of Genesis and Remediation of Groundwater Pollution, School of Water Resources and Environmental Engineering, East China University of Technology, Nanchang, Jiangxi, 330013, P.R. China.
Reclaimed water plays a pivotal role in addressing water scarcity and pollution. The carbon (C) cycle significantly impacts aquatic ecosystems and water quality, yet the C biogeochemical cycle in nutrient-rich reclaimed water remains enigmatic. This study focuses on reclaimed water, developing a conceptual biogeochemical mass balance model to examine C cycling and assess the C budget in the highly eutrophic Jian and Chaobai rivers.
View Article and Find Full Text PDFDeciphering the distribution and enrichment of arsenic in geothermal water in the Red River Fault Zone, southwest China.
J Hazard Mater
December 2024
United Laboratory of High-Pressure Physics and Earthquake Science, Institute of Earthquake Forecasting, China Earthquake Administration, Beijing 100036, China.
Article Synopsis
- The study investigates the distribution and sources of arsenic in geothermal hot springs along the Red River Fault Zone in southwest China, using hydrochemical and isotopic methods.
- Findings reveal that arsenic concentrations are significantly higher in the northern part of the fault (mean 212.73 µg/L) compared to the southern part (less than 10 µg/L), attributed to different rock types and geological conditions.
- Two key sources of arsenic are identified: leaching from deep geothermal rocks and desorption from sediment due to high HCO levels, with shallow groundwater mixing also influencing arsenic content.
Analogs of Precambrian microbial communities formed in Caucasian mineral water aquifers.
mBio
January 2025
Winogradsky Institute of Microbiology, Research Centre of Biotechnology, Russian Academy of Sciences, Moscow, Russia.
Article Synopsis
- * Researchers used metagenomic and cultivation-based methods to analyze the microbiomes and found stable microbial communities similar to those from critical early Earth periods, indicating a link between present-day microbes and historical biospheric evolution.
- * The Upper Jurassic aquifer, rich in CO and influenced by magmatic processes, hosts a unique ecosystem that may reflect early Earth conditions, contributing valuable insights into microbial evolution and the formation of the modern biosphere.
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