Specific autoantibodies were assessed among residents of the Navajo Nation in New Mexico chronically exposed to metal mixtures from uranium mine wastes and in drinking water supplies. Age and the extent of exposure to legacy waste from 100 abandoned uranium mine and mill sites were associated with antibodies to denatured DNA, previously known to be an early indicator of medication-induced autoimmunity. Surprisingly, autoantibodies to native DNA and/or chromatin were also linked to environmental exposure, specifically uranium consumption through drinking water for both men and women, while urinary arsenic was negatively associated with these autoantibodies in women. These findings suggest that contaminants derived from uranium mine waste enhanced development of autoantibodies in some individuals, while arsenic may be globally immunosuppressive with gender-specific effects. Specific autoantibodies may be a sensitive indicator of immune perturbation by environmental toxicants, an adverse effect not considered in current drinking water standards or regulatory risk assessment evaluations.
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http://dx.doi.org/10.1016/j.jaut.2019.01.006 | DOI Listing |
ACS Omega
December 2024
School of Earth and Environment, Anhui University of Science and Technology, Huainan 232001, P. R. China.
A strategically designed ternary nanohybrid (TNS-PDA/CNT), consisting of titanate nanosheet (TNS) and polydopamine-modified multiwalled carbon nanotube (PDA/CNT composite), was synthesized by the facile hydrothermal method and wet impregnation method for removal of U(VI) from aqueous solution and were characterized by transmission electron microscopy (TEM), scanning electron microscopy-energy-dispersive X-ray spectroscopy (SEM-EDS), X-ray diffraction (XRD), Fourier transform infrared (FT-IR), thermogravimetric analysis (TGA), Raman spectroscopy, Brunauer-Emmett-Teller (BET), and X-ray photoelectron spectroscopy (XPS). TNSs were introduced into the PDA/CNT composite, which effectively averted the agglomeration of the CNT and further exposed more adsorption sites. PDA thin layer exposing more active sites was conducive to enhance adsorption capacity and kinetic.
View Article and Find Full Text PDFUnderstanding the effects of ecological restoration in abandoned coal mines on soil and plant is important to improve the knowledge of ecosystems evolution and facilitate taking appropriate ecological restoration management practices. This study aims to evaluate the coupling relationship between plant diversity and soil properties after ecological restoration in abandoned coal mine area. The plant diversity such as Margalef index (), Simpson index (), Shannon-Wiener index (), and Pielou index (), and soil properties such as soil pH, soil water content (SWC), soil bulk density (SBD), soil organic matter (SOM), available nitrogen (AN), and microbial biomass carbon (MBC) were investigated in four sites of different ecological restoration patterns, T and study the coupling relationship between them.
View Article and Find Full Text PDFACS Omega
December 2024
School of Earth Sciences, East China University of Technology, Nanchang, Jiangxi Province 330013, China.
The Chepaizi Uplift, situated on the western edge of the Junggar Basin in northwestern China, has recently become a significant target area for in situ leach sandstone-type uranium exploration. The Neogene Shawan Formation, a newly identified uranium-bearing layer, has gained considerable attention for its potential. This study utilizes scanning electron microscopy (SEM), X-ray powder diffraction (XRD), whole-rock geochemistry, and electron probe microanalysis (EPMA) of uranium minerals.
View Article and Find Full Text PDFEnviron Sci Pollut Res Int
December 2024
Resolventa Ltd, Asbestovsky Lane, 4Zh, 620041, Yekaterinburg, Russia.
The uranium mines both developed and abandoned appear to be one of the most significant sources of radon exhalation in the world. Therefore, the study of radon exposure of the population in the areas around rehabilitated uranium mines is very important. This article presents the results of the radon release studies at the rehabilitated Beshtaugorsky uranium mine site, which is now used by local people for hiking and picnicking.
View Article and Find Full Text PDFSmall Methods
December 2024
Marine Science and Technology College, Zhejiang Ocean University, Zhoushan, 316022, China.
Uranium extraction from seawater (UES) is crucial for ensuring the sustainable development of nuclear power and has seen significant advancements in recent years. However, natural seawater is a highly complex biogeochemical system, characterized by an extremely low uranium (U) concentration (≈3.3 µg L), abundant competitive ions, and significant marine biological pollution, making UES a formidable challenge.
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