Weathering-induced Sb isotope fractionation during leaching of stibnite and formation of secondary Sb minerals DOI Creative Commons
A. Kaufmann, Marina Lazarov,

I. Horn

et al.

Chemical Geology, Journal Year: 2024, Volume and Issue: 662, P. 122253 - 122253

Published: June 25, 2024

In this work, we investigated the extent of antimony (Sb) isotopic fractionation during weathering stibnite at supergene conditions. Antimony isotope data have been obtained from secondary Sb minerals collected Pezinok, Dobšiná (both Slovakia) and Allchar (North Macedonia) deposits mine tailings. The compositions sulfides formed on primary [Sb2S3] or in tailings grains were compared with each other. Furthermore, experimentally leaching different acids. Our study reveals a large range for δ123Sb (from −0.50 to +0.69 ‰) minerals. They are either isotopically indistinguishable lighter than stibnite. Isotopically products likely by quantitative transfer minerals, such as brandholzite [Mg(H2O)6[Sb(OH)6]2] Pezinok. Isotopic towards was observed adsorption onto iron oxides. Distinctly tripuhyite [FeSbO4], chapmanite [Fe3+2Sb3+(Si2O5)O3(OH)], hydroxyferroromeite [Fe2Sb2O6(OH)], stibiconite [Sb3O6OH] that replace pore solutions. These generated partial precipitation aqueous solutions produced dissolution experiments HCl oxalic acid, leached without significant effects first 2–3 days, followed drop dissolved concentration associated high leachate (by up 0.5 after 4–7 days. We interpret these observations be related oxides low δ123Sb, resulting an heavy pool. findings agreement previous results groundwater drainage water > +0.36 ‰ may suggest 'truly' (operationally defined <0.45 μm) fraction general heavy.

Language: Английский

Species-specific Antimony Isotope Analysis by High Performance Liquid Chromatography Coupled with Multicollector ICPMS Using Hydride Generation as an Interface DOI
Linjie Chen,

Yuanyuan Du,

Shuyang Li

et al.

Analytical Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 21, 2025

A novel method has been developed for the simultaneous online determination of isotopic compositions different antimony (Sb) species in a single analytical run using high-performance liquid chromatography (HPLC) coupled with multicollector inductively plasma mass spectrometry (MC-ICPMS), hydride generation (HG) serving as interface. Various parameters affecting precision Sb isotope analysis including HG conditions, transient signal processing methods and peak integration windows, were optimized. The linear regression slope 100% window provided optimal precision. Under optimized our achieved external 2SD precisions better than 0.05‰ both Sb(III) Sb(V), minimal consumption 0.5 ng 5 Sb(V). Furthermore, flow injection (FI) HG-MC-ICPMS demonstrated precise sample requirements low 0.25 ng. proposed validated by analyzing δ123Sb synthetic solutions reference materials. Additionally, it was applied to investigate fractionation during reduction Sb(V) KI, revealing preferential light isotope(121Sb). varied from -0.04- 1.18‰, fitting well Rayleigh model yielding factor (αSb(III)-Sb(V)) 0.99831. In summary, this approach enables high simultaneously reduced consumption, providing powerful tool investigating various environmental processes advancing understanding biogeochemical cycle.

Language: Английский

Citations

0
Application of Antimony Stable Isotopes in Revealing the Source and Vertical Migration of Sb in Soil DOI
Xinyu Li, Sun Guangyi, Yu Lin

et al.

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: March 18, 2025

Antimony (Sb) is a widespread contaminant that poses potential carcinogenic risks worldwide. Many countries are grappling with significant historical Sb-containing waste, leading to soil contamination, which of international concern. The lack clarity on Sb sources and migration mechanisms in limits the effective prevention control pollution. This study utilized stable isotope techniques analyze profiles from two pollution scenarios, aims quantifying sources, understanding processes, elucidating isotopic fractionation soil. results reveal surface originates primarily atmospheric dry deposition (31.7-56.3%), wet (19.6-32.7%), rock weathering (<21.0%). In subsurface soils, mainly comes solutions resulting desorption upper layers, adsorption by iron minerals, manganese (hydr-)oxides, organic matter impeding its downward movement. Deeper layers contain derived parent weathering, impacted secondary mineral adsorption. Groundwater aids influences during water-soil exchange. research introduces novel framework for quantitatively tracking enhances scientific geochemical behavior

Language: Английский

Citations

0
Distinct mechanisms of stibnite (Sb2S3) oxidative dissolution mediated by acid-generating and alkali-generating microorganisms within a wide pH range DOI
Liyuan Ma, Junhua Zhang, Weikang Gao

et al.

Journal of Hazardous Materials, Journal Year: 2025, Volume and Issue: unknown, P. 138141 - 138141

Published: April 1, 2025

Language: Английский

Citations

0
Screening of efficient Antimony-oxidizing bacterium Lysinibacillus HC02 and its effect on preventing the absorption and accumulation of Sb in Brassica napus DOI
Z. Xiong, Caiyuan Ling, Qian Zhang

et al.

Plant and Soil, Journal Year: 2025, Volume and Issue: unknown

Published: April 29, 2025

Language: Английский

Citations

0
Identification of the sources and migration of antimony in karst terraces via Sb stable isotopes DOI
Yunjie Wu, Sun Guangyi, Yu Lin

et al.

Journal of Hazardous Materials, Journal Year: 2025, Volume and Issue: unknown, P. 138570 - 138570

Published: May 1, 2025

Language: Английский

Citations

0
Investigation on the efficient oxidation-mineralization immobilization mechanism of antimony by Klebsiella aerogenes HC10 induced by calcium DOI

Jingying Gu,

Qun Rong,

Qian Zhang

et al.

Journal of environmental chemical engineering, Journal Year: 2025, Volume and Issue: unknown, P. 117163 - 117163

Published: May 1, 2025

Language: Английский

Citations

0
Weathering-induced Sb isotope fractionation during leaching of stibnite and formation of secondary Sb minerals DOI Creative Commons
A. Kaufmann, Marina Lazarov,

I. Horn

et al.

Chemical Geology, Journal Year: 2024, Volume and Issue: 662, P. 122253 - 122253

Published: June 25, 2024

In this work, we investigated the extent of antimony (Sb) isotopic fractionation during weathering stibnite at supergene conditions. Antimony isotope data have been obtained from secondary Sb minerals collected Pezinok, Dobšiná (both Slovakia) and Allchar (North Macedonia) deposits mine tailings. The compositions sulfides formed on primary [Sb2S3] or in tailings grains were compared with each other. Furthermore, experimentally leaching different acids. Our study reveals a large range for δ123Sb (from −0.50 to +0.69 ‰) minerals. They are either isotopically indistinguishable lighter than stibnite. Isotopically products likely by quantitative transfer minerals, such as brandholzite [Mg(H2O)6[Sb(OH)6]2] Pezinok. Isotopic towards was observed adsorption onto iron oxides. Distinctly tripuhyite [FeSbO4], chapmanite [Fe3+2Sb3+(Si2O5)O3(OH)], hydroxyferroromeite [Fe2Sb2O6(OH)], stibiconite [Sb3O6OH] that replace pore solutions. These generated partial precipitation aqueous solutions produced dissolution experiments HCl oxalic acid, leached without significant effects first 2–3 days, followed drop dissolved concentration associated high leachate (by up 0.5 after 4–7 days. We interpret these observations be related oxides low δ123Sb, resulting an heavy pool. findings agreement previous results groundwater drainage water > +0.36 ‰ may suggest 'truly' (operationally defined <0.45 μm) fraction general heavy.

Language: Английский

Citations

1