Advances in Trace Elements and Their Isotopes in Marine Chemistry and Hydrogeology

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Hydrogeology".

Deadline for manuscript submissions: closed (31 December 2023) | Viewed by 2628

Special Issue Editors


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Guest Editor
Institute of Earth Sciences, Academia Sinica, Taipei 11529, Taiwan
Interests: marine trace element and isotope geochemistry; analytical techniques for high-precision isotopic analyses; paleoceanography and paleoclimatology

E-Mail Website
Guest Editor
Institute of Earth Sciences, Academia Sinica, Taipei 11529, Taiwan
Interests: isotope geochemistry; subduction zone geochemistry; paleoenvironment reconstructions

Special Issue Information

Dear Colleagues,

Geochemical behaviors of trace elements and their isotopes (TEIs) in the hydrosphere have been increasingly used to further understand sources, sinks, and cycling of the TEIs in the ocean and aquatic environemnts. With the international effort of the GEOTRACES program, for example, the main controls on the distributions of TEIs in the ocean have been better constrained in the past few years, and have been successfully applied to study the biogeochemical processes in the ocean, and the interactions among the hydrosphere, biosphere and lithosphere. In this Special Issue, entitled “Advance in Trace Elements and Their Isotopes in Marine Chemistry and Hydrogeology”, we welcome contributions that focus on any aspects of elemental mobility, isotopic variations, and analytical methods for investigating sources, sinks, and cyclings of the TEI in the ocean and freshwater environments. Papers on the anthropogenic influences on the TEIs in the hydrospere and applications in Paleoceanography and Paleoclimatology are also very welcome.

The main objective of this Special Issue is to enhance the potential applications of using tracers of trace elements and their isotopes for studying oceanographic and hydrogelological studies.

Dr. Kuo-Fang (Denner) Huang
Dr. Yung-Hsin Liu
Guest Editors

Manuscript Submission Information

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Keywords

  • trace element
  • isotope geochemistry
  • marine chemistry
  • hydrogeology
  • stable isotope
  • radiogenic isotope
  • paleooceeanography & paleoclimatology

Published Papers (2 papers)

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Research

14 pages, 2986 KiB  
Article
Iron and Molybdenum Isotope Application for Tracing Industrial Contamination in a Highly Polluted River
by Yu-Hsuan Liang, Po-Chao Wu, Shail Vijeta Ekka, Kuo-Fang Huang and Der-Chuen Lee
Water 2024, 16(2), 199; https://doi.org/10.3390/w16020199 - 5 Jan 2024
Cited by 3 | Viewed by 1040
Abstract
Rivers adjacent to industrial zones usually suffer from severe pollution issues. Industrial wastewater that has undergone sewage treatment processes may be legally discharged into rivers under water quality permits. Previous studies have frequently employed isotopic tracers to identify potential contaminants for pollution control. [...] Read more.
Rivers adjacent to industrial zones usually suffer from severe pollution issues. Industrial wastewater that has undergone sewage treatment processes may be legally discharged into rivers under water quality permits. Previous studies have frequently employed isotopic tracers to identify potential contaminants for pollution control. Conventional radiogenic isotopes utilized in tracing studies cannot discern whether the source is untreated (primary) industrial wastewater, which can have serious impact to the environment. By analyzing the iron (Fe) and molybdenum (Mo) isotopic compositions in original industrial wastewater and treated effluent, this study aims to investigate whether the heavily polluted Agongdian River is contaminated by the untreated wastewater. Based on the results from this study, the original industrial wastewater exhibits higher concentrations of metallic elements and heavier Fe and lighter Mo isotopic compositions, compared to the treated effluent. Consequently, it appears that Agongdian River water indeed exhibits evidence of untreated industrial wastewater. Furthermore, the volume of original industrial wastewater entering the river can be estimated from these results. This research offers a more precise and accurate approach to monitor potential industrial wastewater pollution in natural water bodies, contributing to the goal of environmental protection and sustainable development. Full article
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22 pages, 6186 KiB  
Article
Mg and Sr Isotopes in Cap Dolostone: Implications for Oceanic Mixing after a Neoproterozoic Snowball Earth Event
by Shiau-Shiun Lin, Chen-Feng You, Chuan-Hsiung Chung, Kuo-Fang Huang and Chuanming Zhou
Water 2023, 15(15), 2688; https://doi.org/10.3390/w15152688 - 25 Jul 2023
Viewed by 1150
Abstract
The snowball Earth (SBE) describes a state of the Earth’s climate with global or near-global ice cover. The cap dolostone at the base of the Ediacaran successions serves as useful archives for studying environmental change during the Marinoan Snowball Earth deglaciation in Neoproterozoic. [...] Read more.
The snowball Earth (SBE) describes a state of the Earth’s climate with global or near-global ice cover. The cap dolostone at the base of the Ediacaran successions serves as useful archives for studying environmental change during the Marinoan Snowball Earth deglaciation in Neoproterozoic. The characteristic compositions in dolomite provide critical information on continental weathering and coastal water mixing after glacial retreat. However, valid methods for pristine dolomite separation remain challenging. In this study, four selected cap dolostone samples from the base of the Ediacaran Lantian Formation were used for establishing a new 3-step leaching method, to remove the secondary calcite and other impurities before determination of δ26Mg and 87Sr/86Sr in dolomite. Non-destructive Raman, X-ray diffractometer (XRD) and scanning electron microscopy (SEM) were used to examine the distribution of dolomite and minor calcite/silicate in each sample. Micro-drill powders before each extraction procedure were examined in weight loss and mineralogical compositions, as well as the chemicals in the leaching solutions. Potential diagenetic artifacts were evaluated using Sr/Ca, Mn/Sr, 87Sr/86Sr and δ26Mg in solutions. By applying a simple two-end member mixing between the seawater and the silicate sources (R2 = 0.48, n = 23), the down-core variations of δ26Mg and 87Sr/86Sr in cap dolostone can be used to gain a better understand of the temporal weathering intensity changes, as well as the coastal oceanic mixing processes, after the Marinoan deglaciation. Full article
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