Environmental applications of metal stable isotopes: Silver, mercury and zinc

Li, Wei; Gou, Wenxian; Li, Weiqiang; Zhang, Tuoya; Bao, Yu; Liu, Qian; Shi, Jianbo

doi:10.1016/j.envpol.2019.06.037

Cited by 42 publications

(16 citation statements)

References 135 publications

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“…22 Isotopic fingerprints in various environmental media can be used to identify the contributions of different sources during mixing, and the massindependent fractionations (MIFs) of odd isotopes distinguish processes, such as photochemical reactions. 23 The isotopic compositions in multiple media, including biota, surface soil, sediment, and rainfall, have been investigated on the Tibetan Plateau, 24−28 illustrating Hg geochemical cycling in terrestrial and aquatic food webs. However, the isotopic compositions in GEM remain unknown, which impedes further clarifications of the sources and fates of Hg pollutants in these regions.…”

Section: ■ Introductionmentioning

confidence: 99%

Tracing the Transboundary Transport of Mercury to the Tibetan Plateau Using Atmospheric Mercury Isotopes

Bao

Yang

Liu

et al. 2022

Environ. Sci. Technol.

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Deposition of atmospheric mercury (Hg) is the most important Hg source on the high-altitude Himalayas and Tibetan Plateau. Herein, total gaseous Hg (TGM) at an urban and a forest site on the Tibetan Plateau was collected respectively from May 2017 to October 2018, and isotopic compositions were measured to clarify the influences of landforms and monsoons on the transboundary transport of atmospheric Hg to the Tibetan Plateau. The transboundary transported anthropogenic emissions mainly originated over Indo-Gangetic Plain and carried over the Himalayas by convective storms and mid-tropospheric circulation, contributing over 50% to the TGM at the Lhasa urban site, based on the binary mixing model of isotopes. In contrast, during the transport of TGM from South Asia with low altitude, the uptake by evergreen forest in Yarlung Zangbo Grand Canyon largely decreased the TGM level and shifted isotopic compositions in TGM at the Nyingchi forest site, which are located at the highaltitude end of the canyon. Our results provided direct evidence from Hg isotopes to reveal the distinct patterns of transboundary transport to the Tibetan Plateau shaped by landforms and climates, which is critical to fully understand the biogeochemical cycling of Hg in the high-altitude regions.

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Section: ■ Introductionmentioning

confidence: 99%

Tracing the Transboundary Transport of Mercury to the Tibetan Plateau Using Atmospheric Mercury Isotopes

Bao

Yang

Liu

et al. 2022

Environ. Sci. Technol.

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“…Furthermore, non-traditional isotope systems, notably the zinc isotopes, have been successfully applied as tracers of anthropogenic emissions and lowtemperature biogeochemical processes in large river basins (Chen et al, 2009b;Desaulty and Petelet-Giraud, 2020;Petit et al, 2015;Zimmermann et al, 2020). Zn isotope compositions (expressed as δ 66/64 ZnJMC notation) are used as source identification tools (Araújo et al, 2017a;Li et al, 2019;Tonhá et al, 2020;Xia et al, 2020), which can distinguish between lithogenic materials derived from weathering processes (+0.28 ± 0.05 ‰) (Chen et al, 2013) and anthropogenic materials, such as road dust (+0.08 to +0.17 ‰) and tire-wear (+0.00 to +0.22 ‰) (Dong et al, 2017;Souto-Oliveira et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Trace metal dynamics in an industrialized Brazilian river: A combined application of Zn isotopes, geochemical partitioning, and multivariate statistics

Tonhá

Araújo

Araujo

et al. 2021

Journal of Environmental Sciences

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The Paraiba do Sul (PSR) and Guandu Rivers (GR) water diversion system (120 km long) is located in the main industrial pole of Brazil and supplies drinking water for 9.4 million people in the metropolitan region of Rio de Janeiro. This study aims to discern the trace metals dynamics in this complex aquatic system. We used a combined approach of geochemical tools such as geochemical partitioning, Zn isotopes signatures, and multivariate statistics. Zinc and Pb concentrations in Suspended Particulate Matter (SPM) and sediments were considerably higher in some sites. The sediment partition of As, Cr, and Cu revealed the residual fraction (F4) as the main fraction for these elements, indicating low mobility. Zinc and Pb were mostly associated with the exchangeable/carbonate (F1) and the reducible (F2) fractions, respectively, implying a higher susceptibility of these elements to being released from sediments. Zinc isotopic compositions of sediments and SPM fell in a binary mixing source process between lithogenic (δ66/64ZnJMC ≈ + 0.30‰) and anthropogenic (δ66/64ZnJMC ≈ + 0.15‰) end members. The lighter δ66/64ZnJMC values accompanied by high Zn concentrations in exchangeable/carbonate fraction (ZnF1) enable the tracking of Zn anthropogenic sources in the studied rivers. Overall, the results indicated that Hg, Pb, and Zn had a dominant anthropogenic origin linked to the industrial activities, while As, Cr, and Cu were mainly associated with lithogenic sources. This work Please note that this is an author-produced PDF of an article accepted for publication following peer review. The definitive publisher-authenticated version is available on the publisher Web site.demonstrates how integrating geochemical tools is valuable for assessing geochemical processes and mixing source effects in anthropized river watersheds.

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“…Several general reviews have been published on the geochemistry of various metal isotope systems (Bullen, 2012;Hoefs, 2018;Hu & Teng, 2021;Li et al, 2019;Teng et al, 2017;Wang et al, 2021), including the excellent summarizing work by Jan G. Wiederhold focusing on environmental metal isotope geochemistry (Wiederhold, 2015). Moreover, studies involving isotope fractionation in the ocean and soil-plant systems highlighted the need for a detailed investigation of metal isotopes behavior after their complexation as a prerequisite for appropriate interpretation of the metal isotope ratio in the environment (e.g., Caldelas & Weiss, 2017;Ripperger & Rehk€ amper, 2007).…”

Section: Introductionmentioning

confidence: 99%

Metal isotope complexation with environmentally relevant surfaces: Opening the isotope fractionation black box

Komárek

Ratié

Vaňková

et al. 2021

Critical Reviews in Environmental Science and Technology

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The number of studies using various stable isotope systems for tracing contamination sources and various biogeochemical processes is rapidly rising due to the increased availability of the techniques used for isotope analyses. However, in most cases, the resulting isotope data are influenced by many processes occurring within reactive environmental compartments, e.g., soils and sediments, such as sorption, precipitation, redox changes, interactions with plants and microorganisms, etc. Therefore, isotope tracing becomes challenging as it is crucial to identify and quantify the isotope fractionation extent during separate processes in this so-called "isotope fractionation black box". The main aim of this review is to (i) summarize literature data on fractionation of selected metal isotopes (Cd, Cu, Hg, Ni, Zn) after complexation with relevant environmental surfaces, e.g., oxyhydroxides, clay minerals, natural organic matter etc., (ii) briefly describe the analytical techniques and key procedures used for the determination of such data and (iii) provide suggestions and perspectives for future research, including a critical evaluation of specific issues related to isotope analyses and especially the interpretation of results. For example, concentration equilibrium usually differs from isotope fractionation equilibrium, metal coordination chemistry in solution is crucial to decipher metal isotopic fractionation, spectroscopic data are missing, different experimental conditions are often and potential precipitation and desorption reactions are not always considered, etc. Consistent presentation of adsorption/complexation data would also be highly beneficial in future studies.

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Environmental applications of metal stable isotopes: Silver, mercury and zinc

Cited by 42 publications

References 135 publications

Tracing the Transboundary Transport of Mercury to the Tibetan Plateau Using Atmospheric Mercury Isotopes

Tracing the Transboundary Transport of Mercury to the Tibetan Plateau Using Atmospheric Mercury Isotopes

Trace metal dynamics in an industrialized Brazilian river: A combined application of Zn isotopes, geochemical partitioning, and multivariate statistics

Metal isotope complexation with environmentally relevant surfaces: Opening the isotope fractionation black box

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