Elisabeth Eiche

Elisabeth Eiche
Karlsruhe Institute of Technology | KIT · Institute of Applied Geosciences

PhD

About

115
Publications
18,179
Reads
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1,399
Citations
Additional affiliations
January 2006 - present
Karlsruhe Institute of Technology
Position
  • Scientist, head of lab

Publications

Publications (115)
Article
High concentrations of geogenic As in the groundwaters of south and SE Asia, which are used as drinking waters, are causing severe health impacts to the exposed human populations. It is widely accepted that As mobilisation from sediments into these shallow reducing groundwaters requires active metal-reducing microbes and electron donors such as org...
Article
Geothermal power plants produce large amounts of high-temperature fluids from variable depths. These fluids can be enriched in lithium to up to 240 mg/L, rendering them an exploitable resource, not yet processed at industrial scale. The pressure on Li demand is expected to increase in the future, making the technical degradability of new Li resourc...
Article
Salinity poses a serious threat to global agriculture and human food security. A better understanding of plant adaptation to salt stress is, therefore, mandatory. In the non-photosynthetic cells of the root, salinity perturbs oxidative balance in mitochondria, leading to cell death. In parallel, plastids accumulate the jasmonate precursor cis (+)12...
Article
Full-text available
This paper focuses on the correlation of two different marble units from an approximately 3,900 m deep geothermal exploration well (GP-1) in western Turkey by petrographical and geochemical data. Future geothermal exploration drilling in that area will benefit from a better (tectono) stratigraphic correlation and a better definition of the reservoi...
Conference Paper
Full-text available
In order to increase the economic potential of geothermal power plants in view of environmental protection and sustainability, there are considerations to extract critical raw materials (CRM), such as lithium, from the geothermal fluids. The Upper Rhine Graben (URG) in southern Germany is of particular interest as it represents a hydrothermal fluid...
Book
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This field guide was prepared to the Geokarlsruhe 2021, Kaiserstuhl Fieldtrip, 17th – 18th September 2021
Article
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Phosphorus (P) is an essential macronutrient, playing a role in developmental and metabolic processes in plants. To understand the local and systemic responses of sorghum to inorganic phosphorus (Pi) starvation and the potential of straw and ash for reutilisation in agriculture, we compared two grain (Razinieh) and sweet (Della) sorghum varieties w...
Chapter
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Selenium contamination of air, aquatic environments, soils and sediments is a serious environmental concern of increasing importance. Selenium has a paradoxical feature in bringing about health benefits under the prescribed level, but only a few fold increase in its concentration causes deleterious effects to flora and fauna, humans and the environ...
Article
Full-text available
Geogenic arsenic (As) contamination of groundwater is a health threat to millions of people worldwide, particularly in alluvial regions of South and Southeast Asia. Mitigation measures are often hindered by high heterogeneities in As concentrations, the cause(s) of which are elusive. Here we used a comprehensive suite of stable isotope analyses and...
Article
High arsenic (As) concentrations in groundwater are a worldwide problem threatening the health of millions of people. Microbial processes are central in the (trans)formation of the As-bearing ferric and ferrous minerals, and thus regulate dissolved As levels in many aquifers. Mineralogy, microbiology and dissolved As levels can vary sharply within...
Article
Full-text available
Fe(III) minerals play a crucial role for arsenic (As) mobility in aquifers as they usually represent the main As-bearing phases. Microbial reductive dissolution of As-bearing Fe(III) minerals is responsible for the release of As and the resulting groundwater contamination in many sites worldwide. So far, in most studies mainly abiogenic iron minera...
Article
Although phosphate (PO4³⁻) may play a decisive role in enriching toxic arsenic (As) in the groundwater of many Asian deltas, knowledge gaps exist regarding its interactions with As. This study investigates the simultaneous immobilisation of PO4³⁻ and As in aquifer sediments at a redox transition zone in the Red River Delta of Vietnam. The majority...
Article
Iron minerals are the most important arsenic host in As-contaminated deltaic sediments. Arsenic release from Fe minerals to groundwater exposes millions of people worldwide to a severe health threat. To understand the coupling of Fe mineralogy with As (im)mobilization dynamics, we analyzed the geochemistry and mineralogy of a 46 m long sediment cor...
Article
Full-text available
Abstract Purpose To understand the impact of geochemical sedimentation history for arsenic (As) distribution in the sediment profiles of the Hetao Basin, we (1) evaluated sediments provenance and variations of weathering intensities; (2) attempted to reconstruct the depositional environments and (3) explored the As and Fe speciation in the sediment...
Article
Full-text available
Salinity is a serious challenge to global agriculture and threatens human food security. Plant cells can respond to salt stress either by activation of adaptive responses, or by programmed cell death. The mechanisms deciding the respective response are far from understood, but seem to depend on the degree, to which mitochondria can maintain oxidati...
Preprint
Full-text available
Abstract. The societal and cultural development during the Bronze Age and the subsequent Iron Age was enormous in Greece, however interrupted by two significant transformations around 4200 years b2k (Early Helladic II/III; b2k refers to years before 2000 CE) and 3200 years b2k (end of Late Helladic III). Artefacts and building remains provide some...
Article
Batch experiments were performed to study adsorption and desorption of 75Se and 113Sn radiotracers at environmentally representative concentrations of ~0.3 ng L-1 and ~3 ng L-1, respectively. The radiotracers were incubated with wet bulk sediments from the Gironde Estuary and the Rhône River, combining freshwater and coastal seawater salinity (S =...
Article
Full-text available
The efficiency and mechanism of orthophosphate—soluble reactive phosphorus (SRP)—inactivation in eutrophic lakes using controlled resuspension and calcite application into the sediment were investigated in this study. Two calcite materials, industrially produced precipitated calcium carbonate (PCC) and natural ground limestone (GCC), were tested in...
Article
Full-text available
Abstract Chromium contamination is a serious environmental issue in areas affected by leather tanning and metal plating, and green rust sulfate has been tested extensively as a potential material for in situ chemical reduction of hexavalent chromium in groundwater. Reported products and mechanisms for the reaction have varied, most likely because o...
Article
Full-text available
Geogenic arsenic (As) contamination of groundwater poses a major threat to global health, particularly in Asia. To mitigate this exposure, groundwater is increasingly extracted from low-As Pleistocene aquifers. This, however, disturbs groundwater flow and potentially draws high-As groundwater into low-As aquifers. Here we report a detailed characte...
Article
Tellurium (Te) is a Technology Critical Element (TCE) and a relevant product of nuclear fission. It has an unknown environmental biogeochemical cycle, mostly related to current analytical challenges in measuring its ultra-trace dissolved concentrations in complex environmental matrices. It is therefore generally compared to its geochemical pair sel...
Article
CO2 isotopologues of hydrothermal origin may yield unique information about the hydrothermal system such as the reservoir temperature or advection velocities. The full understanding of the isotopic signal of CO2 from hydrothermal systems, however, is linked to a good knowledge of the isotopic re-equilibration behaviour. In the last decade multiply-...
Article
Full-text available
Soil pollutants may affect root growth through interactions among phytohormones like auxin and jasmonates. Rice is frequently grown in paddy fields contaminated by cadmium and arsenic, but the effects of these pollutants on jasmonates/auxin crosstalk during adventitious and lateral roots formation are widely unknown. Therefore, seedlings of Oryza s...
Article
Full-text available
Selenium plays an important, but vastly neglected role in human nutrition with a narrow gap between dietary deficiency and toxicity. For a potential biofortification of food with Se, as well as for toxicity-risk assessment in sites contaminated by Se, modelling of local and global Se cycling is essential. As bioavailability of Se for rice plants de...
Data
Experimental data of selenite sorption onto kaolinite in the presence of 0.1 M KCl and 750 μM nitrate, phosphate or sulfate. (PDF)
Data
Experimental data of selenite uptake into rice seedlings in the presence of nutrient solution and kaolinite. (PDF)
Data
Experimental data of selenate uptake into rice seedlings in the presence of nutrient solution and kaolinite. (PDF)
Data
Experimental data of selenite and selenate sorption onto kaolinite in the presence of 0.1 M KCl and subsequent desorption of selenite and selenite from kaolinite using K2HPO4. (PDF)
Data
Experimental data of selenate sorption onto kaolinite in the presence of 0.1 M KCl and 750 μM nitrate, phosphate or sulfate. (PDF)
Data
Experimental data of selenite and selenate sorption onto kaolinite in the presence of nutrient solution. (PDF)
Article
Full-text available
Selenium is of special interest in different research fields due to its narrow range between beneficial and toxic effects. On a global scale, Se deficiency is more widespread. Biofortification measures...
Article
The biogeochemical cycling of phosphorus (P) in South and Southeast Asian floodplain and delta aquifers has received insufficient attention in research studies, even though dissolved orthophosphate (PO4³⁻) in this region is closely linked with the widespread contamination of groundwater with toxic arsenic (As). The overarching aim of this study was...
Article
Full-text available
The efficacy of in vitro Cr(VI) reduction by green rust sulfate suggests that this mineral is potentially useful for remediation of Cr-contaminated groundwater. Previous investigations studied this reaction but did not sufficiently characterize the intermediates and end products at chromate (CrO42−) concentrations typical of contaminant plumes, hin...
Poster
Full-text available
Basin brines used for geothermal heat extraction in the Oberrheingraben are mainly highly saline (TDS ≥ 100 g/L, Cl: >55 g/L). As a result, mineral scalings are likely to be formed within the power plants in the cause of heat extraction. Especially the high Cl-concentration can both be a nuisance and a promising hydrochemical feature. In the first...
Article
An improved lab-scale process for coating of carrier particles by aerosol assisted chemical vapor deposition (CVD) is described and characterized to produce a highly dispersed, supported noble-metal catalysts. The process is based on a fluidized bed (FB) operated at atmospheric pressure and focusses on an efficient and lossless delivery of precurso...
Presentation
Full-text available
Discusses XRD- and TEM-based characterization of Cr-bearing products of Cr (VI) reduction by green rust solid solutions.
Presentation
Full-text available
Elevated concentrations of As in groundwater leading to a serious health risk for millions of people have been reported at many places all over the world. Most existing investigations are limited to a uni-disciplinary research approach, thereby neglecting the interactions between hydrochemistry, geochemistry, mineralogy, microbiology and groundwate...
Article
Full-text available
Automated water sampling devices adapted to field operation have proven highly useful for environmental research as well as in the public and private sectors, where natural or artificial waters need to be tested regularly for compliance with environmental and health regulations. Such autosamplers are already available on the market in slightly diff...
Article
Full-text available
With regard to the catalysis of oxidation reactions by noble metals, the addition of FeOx to an Al2O3-supported Pt catalyst is known to be energetically more favorable compared to only Pt. In this work, different process routes for the preparation of such Fe-promoted Pt/Al2O3 catalysts via atmospheric chemical vapor deposition (CVD) in a fluidized...
Article
Full-text available
Cadmium (Cd) and arsenic (As), non essential, but toxic, elements for animals and plants are frequently present in paddy fields. Oryza sativa L., a staple food for at least the half of world population, easily absorbs As and Cd by the root, and in this organ the pollutants evoke consistent damages, reducing/modifying the root system. Auxins are key...
Article
Full-text available
Automated water sampling devices adapted to field operation have proven highly useful for environmental research as well as in the public and private sector, where natural or artificial waters need to be tested regularly for compliance with environmental and health regulations. Such autosamplers are already available on the market in slightly diffe...
Article
Scale formation processes in the surface installations of geothermal power plants may have a negative effect on power plant performance. In addition, scales formed within the geothermal water circuit frequently accumulate natural radionuclides. Consequently, scale formation may lead to radiation dose rates, which are of radiological concern, and de...
Article
Full-text available
It is commonly known that heat extraction and decompression can lead to mineral precipitation and reservoir clogging in geothermal systems. In the Upper Rhine Graben, the precipitating minerals are mainly barite and calcite. This study focuses on clogging processes due to mineral precipitation in porous reservoir rocks, i.e., sandstone. The goal is...
Article
Full-text available
After publication of the article (Orywall et al. 2017), it has been brought to our attention that there are a number of errors. The authors have listed them below.
Article
Full-text available
In tropical karstic regions, knowledge about the timing and quantity of land–ocean groundwater nutrient fluxes is important, as those nutrients may affect coastal ecosystems and contaminate coastal springs. High aquifer permeability of the karst, combined with high recharge and discharge during heavy rain events, leads to a close connectivity betwe...
Conference Paper
Full-text available
The Villarrica-Quetrupillán-Lanín volcanic chain is surrounded by > 20 hot springs, located on the flanks and in the valleys around the volcanos. The hot springs that are extensively used for spa purpose discharge thermal water of intermediate temperatures (27° – 81°C), mostly alkaline pH and low mineralization. To investigate fluid origin and gene...
Article
Full-text available
The potential to provide base-load electricity as well as industrial and domestic heat places geothermal energy in a unique position in the future energy mix. As estimated by the International Energy Agency, geothermal power can contribute to 3.5% to the worldwide power and 3.9% to heat production by 2050. This includes the development of Enhanced...
Article
doi: 10.1021/acs.est.6b02037 Concentrations of soil arsenic (As) in the vicinity of the former Złoty Stok gold mine (Lower Silesia, southwest Poland) exceed 1000 µg g-1 in the area, posing an inherent threat to neighbouring bodies of water. This study investigated continuous As mobilization under reducing conditions for more than 3 months. In part...
Article
Microplastics are increasingly detected in the environment and the consequences on water resources and ecosystems are not clear to date. The present study provides a cost-effective and straightforward method to determine the mass concentrations of polymer types using thermal analysis. Characteristic endothermic phase transition temperatures were de...
Article
Full-text available
Karst aquifers are important water resources but highly vulnerable due to their heterogeneous and complex characteristics. Various hydrological aspects (recharge, flow behaviour) have to be known in detail to develop a sustainable concept for water collection, distribution and treatment. In the karst area of Gunung Sewu (Java, Indonesia) such a con...
Article
Full-text available
In the framework of the Integrated Water Resources Management (IWRM) joint research project in the karst area of Gunung Kidul, Province of Yogyakarta Special Region on the Java Island, Indonesia, an underground hydropower driven water extraction facility in the cave “Bribin” was developed using pump-as-turbine-driven systems for freshwater supply o...
Article
Full-text available
Up to 1 billion people are affected by low intakes of the essential nutrient selenium (Se) due to low concentrations in crops. Biofortification of this micronutrient in plants is an attractive way of increasing dietary Se levels. We investigated a promising method of Se biofortification of rice seedlings, as rice is the primary staple for 3 billion...
Data
Photos of harvested plants treated with Na2SeO4 in phytoagar & delayed Se. (PDF)
Data
all XANES spectra of each region of interest (ROI) on a rice plant treated with 500 μg/L Se as Na2SeO4 in nutrient solution. (PDF)
Data
all XANES spectra of each region of interest (ROI) on a rice plant treated with 2000 μg/L Se as Na2SeO3 in nutrient solution. (PDF)
Data
all XANES spectra of each region of interest (ROI) on a rice plant treated with 2000 μg/L Se as Na2SeO4 in nutrient solution. (PDF)
Data
One-way ANOVA results for root-Se in nut.sol. plants when added as selenite. (PDF)
Data
Wet weight accumulation factors AF of selenite into plant tissue in all three experimental set-ups (AF [–] = c(Se)medium [mg/L] / c(Se)plant [mg/kg]). (PDF)