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Despite reductions in atmospheric sulfur (S) concentrations due to abatement policies in some countries, modeling the dispersion of this pollutant and disentangling anthropogenic sources from natural ones is still of great concern. Lichens have been used as biomonitors of the impacts of S for over 40 years, but their potential as source-tracers of specific sources, including natural ones, remains unexplored. In fact, few attempts have been made to try to distinguish and spatially model different sources of S using lichens. We have measured S concentrations and isotopic values in lichens within an industrial coastal region where different sources of S, natural and anthropogenic, interplay. We detected a prevailing influence of natural sea-originated S that mixed with anthropogenic sources of S. We were then able to disentangle the sources of S, by removing the ocean influence on S isotopic values, enabling us to model the impact of different anthropogenic sources on S deposition and highlighting the potential use of lichens to evaluate the weight of different types of anthropogenic sources.
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http://dx.doi.org/10.1021/es505292t | DOI Listing |
J Hazard Mater
September 2025
Faculty of Environmental and Symbiotic Sciences, Prefectural University of Kumamoto, Kumamoto 862-8502, Japan. Electronic address:
Particulate matter emitted from heavy industries is a major source of atmospheric metals in the North China Plain (NCP). In this study, submicron particles (0.1-1.
View Article and Find Full Text PDFMar Environ Res
September 2025
Shandong Key Laboratory of Coastal Environmental Processes, Yantai, Shandong, 264003, China.
Coastal zones are critical for the biogeochemical cycling of dissolved organic matter (DOM) in marine ecosystems, yet the relative importance of photochemical and microbial degradation in DOM transformation remains poorly understood due to complex hydrodynamics, diverse sources, and human activities. Through 14-day laboratory incubations, we investigated DOM transformation mechanisms from three common marine coastal space uses: port, mariculture and inshore areas adjacent to Yantai City. DOM characterization was performed using fluorescence excitation-emission matrix parallel factor (EEM-PARAFAC) and UV-Vis spectroscopic indices.
View Article and Find Full Text PDFWater Res
September 2025
Key Laboratory of Groundwater Remediation of Hebei Province and China Geological Survey, Shijiazhuang, 050061, China; The Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geosciences, Shijiazhuang, 050061, China.
Groundwater nitrate (NO) and sulfate (SO) pollution in semi-arid regions has attracted widespread attention. However, unveiling the dynamics and sources of NO and SO in regional groundwater is challenging because of complex anthropogenic activities and hydrogeological conditions. This study combined physicochemistry and multiple stable isotopes (δH-HO, δO-HO, δN-NO, δO-NO, δS-SO, and δO-SO) to explore the spatiotemporal patterns, driving factors, sources, and potential health hazards of NO and SO in groundwater on the Loess Plateau, China.
View Article and Find Full Text PDFEnviron Pollut
September 2025
State Key Laboratory of Loess Science, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China. Electronic address:
This study investigates the vertical profiles, pollution status and ecological risks of heavy metal(loid)s contamination in three sediment cores (N21, N03, and 38002) from the North Yellow Sea (NYS), with a focus on the influence of grain size effects on sedimentary profiles. The results revealed distinct vertical distribution patterns of heavy metal(loid)s content among the three sediment cores. Enrichment Factor (EF) and Geo-accumulation Index (I) assessments identified Sb as significantly enriched, indicating anthropogenic influence, whereas Co, Cr, Cu, Ni, and Zn primarily originated from natural weathering.
View Article and Find Full Text PDFMar Environ Res
August 2025
Departamento de Biología Animal, Edafología y Geología. Facultad de Ciencias. Sección Biología. Universidad de La Laguna, Tenerife, Canary Islands, Spain.
Anthropogenic CO emissions drive ocean acidification (OA), which reduces seawater pH and carbonate ion availability, threatening calcifying organisms such as sea urchins. This study examines the long-term effects of OA on Arbacia lixula using a natural volcanic CO vent at Fuencaliente, La Palma (Canary Islands) as an analogue of future conditions. We analyzed the external morphology, skeletal strength, mineralogy, and growth of A.
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