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Modeling of hydrogeochemical processes influencing uranium migration in anthropized arid environments with application to the Teloua aquifer.
J Contam Hydrol
January 2025
Mines Paris, PSL University, Center for Geosciences and Geoengineering, France; ORANO Mining, Environmental R&D Dpt., France.
Sandstone-hosted uranium is mined in the Sahel regions of Niger. The Teloua aquifer is located beneath the ore-processing facilities of one such former mine, COMINAK. The pores of the sandstone bedrock are partially filled by tosudite, a clay with sorption capacities.
View Article and Find Full Text PDFInsight into selective removal of trace thallium (Tl(Ι)) by novel chitosan adsorbents encapsulating low-cost silicate mineral wastes.
Environ Res
January 2025
Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment (MEE), Nanjing, 210042, PR China.
Recently, thallium (Tl) contamination at trace levels has gained worldwide attention, particularly in the remote ore-smelting regions of China. To effectively eliminate the residual target Tl(I) ions, one of the best strategies is to develop novel adsorbents with high selectivity. In this study, we selected silicate mineral waste (SMW) and chitosan (CTS) to synthesize a low-cost composite adsorbent for the removal of trace Tl(I).
View Article and Find Full Text PDFThe Influence of Alkali Metals on the Sintering Mineralization Process of Iron Ore.
Materials (Basel)
January 2025
School of Metallurgical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.
To investigate the influence of alkali metal compounds in different forms on the sintering mineralization process of iron ore, the basic sintering characteristics of iron ore with alkali metal contents ranging from 0 to 4% were measured using the micro-sintering method, and the influence mechanism was analyzed using thermodynamic analysis and first-principles calculations. The results showed that (1) the addition of KCl/NaCl increased the lowest assimilation temperature (LAT) and the index of liquid-phase fluidity (ILF), while that of KCO/NaCO decreased the LAT but increased the ILF of iron ore. (2) The pores formed by the volatilization of KCl/NaCl suppressed the diffusion of Fe and Ca, which inhibited the formation of silico-ferrite of calcium and aluminum (SFCA).
View Article and Find Full Text PDFSelective extraction process of scandium from nickel laterite waste through hydrometallurgy.
RSC Adv
January 2025
Kunming Metallurgical Research Institute Co., Ltd Kunming 650000 China.
Scandium (Sc) extraction from iron and aluminum waste is a promising technique for the recycling and valorization of laterite nickel ore waste. Iron and aluminum waste is one source of scandium during preparation of nickel and cobalt hydroxide by wet smelting of laterite nickel ore. The content of Sc is notably higher than that of the raw materials, as the element is enriched in the iron and aluminum waste.
View Article and Find Full Text PDFEvaluation of racial/ethnic disparities in surgical outcomes after rectal cancer resection: An ACS-NSQIP analysis.
Surg Pract Sci
June 2024
Division of Colorectal Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA.
Background: Disparities exist the management of rectal cancer. We sought to evaluate short-term surgical outcomes among different racial/ethnic groups following rectal cancer resection.
Materials And Methods: National Surgical Quality Improvement Program (NSQIP) database (2016-2019) was queried.
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