Andreas NeumannMartin Luther University Halle-Wittenberg | MLU · Institute of Geosciences and Geography
Andreas Neumann
Dr. rer. nat.
About
63
Publications
8,212
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386
Citations
Introduction
Additional affiliations
September 2001 - September 2002
Fresenius Ingenieur Consult
Position
- Mineralogist
Description
- Environmental Remediation
August 2020 - September 2020
Service Provider (Competenza) for Building Contaminants
Position
- Mineralogist - Further training
Description
- Sampling, Preparation, and Analysis (SEM/EDS) of Asbestos, MMMF - TRGS 519/521
August 2007 - June 2012
Education
October 1994 - May 2001
Publications
Publications (63)
The recycling of lithium‐ion batteries (LIBs) through extractive pyrometallurgy is widely used, but a significant drawback is the loss of lithium to the slag. To address this, lithium‐bearing slag from an industrial LIB recycling plant is analyzed using wavelength dispersive X‐ray fluorescence, inductively coupled plasma optical emission spectrosco...
Verfahren zur Herstellung eines Zementzusatzstoffs umfassend die Schritte:a) Bereitstellen eines Lithiumerzesb) Umsetzen des Lithiumerzes mit konzentrierter Schwefelsäure bei Temperaturen zwischen 200 und 330 °Cc) Zugabe von Wasser, um eine Suspension zu erhaltend) Trennen der Suspension in eine Festphase und eine Flüssigphasee) Verwenden der Festp...
In this paper, two hydrated double salts, whose chemical formulas are K2Mn0.15Co0.85(SO4)2(H2O)6 (KMn/Co) and K2Mn0.16Zn0.84(SO4)2(H2O)6 (KMn/Zn), were crystallized via solvent slow evaporation. The structural, thermal, and vibrational properties were explored and discussed. Furthermore, a study of geometric, electronic, and thermodynamic (entropy,...
Während der Aufbereitung von Spodumen zu Lithiumhydroxid fallen große Mengen gelaugten Spodumens (leached spodumene concentrate, LSC) als Nebenprodukt an. Um eine Deponierung des Materials zu vermeiden, soll eine mögliche Weiterverwendung durch die Zementindustrie geprüft werden. Erste XRD- und XRF-Analysen zeigen, dass LSC im System Al2O3–SiO2–CaO...
In the context of the increasing demand for lithium, the extraction of lithium from spodumene is being pursued.
During the processing of spodumene, large quantities of leached spodumene concentrate (LSC) are produced as a
by-product. To avoid the deposition of the material, potential reuse of the material within the cement industry is
investigated....
There are good ecological, economic and regulatory reasons for recycling lithium-ion batteries (LIBs). One driving force, for example, is the newly adopted EU Battery Directive. Nevertheless, LIB recycling is a young topic that is being tackled differently by a variety of companies.
The following technologies are currently being pursued worldwide,...
In order to utilise this modified process slag as a valuable secondary product, the ITEL and its partners are looking into how other types of slag, e.g. from pig iron and steel production - similar to granulated blast furnace slag - can be further processed or recycled in a meaningful way
Two synthesis routes of the zircon−hafnon solid solution
series were carried out. The high-temperature route uses the growth of
single crystals via a flux mixture that has been cooled down slowly from
1400 °C over 4 weeks. The reaction products were colorless and
idiomorphic without byproducts. The hydrothermal tetraethoxysilane
(TEOS)-based route...
To set up recommendations on how to define “reasonable minimum composition thresholds” for CO2 streams to access CO2 pipeline networks, we investigated potential impacts of CO2 streams with different and temporally variable compositions and mass flow rates along the CCS chain. All investigations were based on a generic “CCS cluster scenario” in whi...
The collaborative project “Impacts of impurities in CO2 streams captured from different emitters in a regional cluster on transport, injection and storage (CLUSTER)” aimed to set up recommendations on how to define “reasonable minimum composition thresholds” that CO2 streams should meet when accessing CO2 transport pipeline networks. Within CLUSTER...
Considering CCS (carbon capture and storage), the interaction was investigated of CEM III mortar specimen with CO2, featuring small amounts of SO2 and NO2 (approx. 70 ppm) in the presence of chloride-rich brine at 333 K and 16 MPa. Chemical and mineralogical characteristics of the cement were analysed. The mineralogy of hardened cement pastes (HCP)...
- Carbon Capture and Storage (CCS)
- Joint BMWi-Project CLUSTER: BGR, BAM, DBI, ET, MLU, TUHH, TUC.
- Kurzzusammenfassung:
Ziel des Projektes „Auswirkungen der Begleitstoffe in den abgeschiedenen CO2-Strömen
unterschiedlicher Emittenten eines regionalen Clusters auf Transport, Injektion und
Speicherung (CLUSTER)“ war es, Empfehlungen zur Definition...
- Carbon Capture and Storage - CCS: Experimental mineralogical-chemical and
geomechanical combination studies on the effect of impure CO2 fluid streams on rocks (Siliceous Sandstone) and cements (CEM III and Wollastonite based) in the injection area of the geological reservoir.
![Conversion of wollastonite dependent on pressure [27]](publication/331608934/figure/fig3/AS:941944108748857@1601588384652/Conversion-of-wollastonite-dependent-on-pressure-27_Q320.jpg)
Wollastonite can be used as cementitious material, for example in carbon capture and storage (CCS application). The interaction of wollastonite (CS) and pure CO2 in the presence of H2O at temperature (333 K) relevant to injection conditions for CCS were investigated within the joint BMWi research project CLUSTER. The reaction which describes the fo...
The reaction of wollastonite with CO2 accompanied by SO2 and NO2 in the presence
of a chloride-rich brine (230 g/L NaCl, 15 g/L CaCl2, 5 g/L MgCl2) at temperatures relevant to injection conditions (333 K) in carbon capture and storage (CCS) were investigated within the joint BMWi (Federal Ministry for Economic Affairs and Energy) research project C...
To reduce the amount of CO2 concentration of the atmosphere (currently 408 ppm) several possibilities had to be considered. One possible technology being investigated and discussed is carbon capture and storage (CCS). The goal of CCS is reducing CO2 emissions from burning of fossil fuel by storing considerable amounts in suitable deep geologic rese...
To reduce the amount of CO2 in the atmosphere (currently 408 ppm) several possibilities need to be considered. One possible technology being investigated and discussed is carbon capture and storage (CCS). The goal of CCS is reducing CO2 emissions from burning of fossil fuel by storing considerable amounts in suitable deep geologic reservoirs. The r...
To reduce the amount of CO 2 concentration of the atmosphere (currently 408 ppm) several possibilities had to be considered. One possible technology being investigated and discussed is carbon capture and storage (CCS). The goal of CCS is reducing CO 2 emissions from burning of fossil fuel by storing considerable amounts in suitable deep geologic re...
The sealing of wells in deep geologic formations being considered for carbon capture and storage (CCS) must be tight and sustainable. Therefore the choice of a cement, used for sealing, is extremely critical. The material has to resist the extreme conditions at the point of injection considering pressure, temperature, pH, and the composition of agg...
The sealing of wells in deep geologic formations being considered for carbon capture and storage (CCS) must be tight and sustainable. Therefore the choice of a cement, used for sealing, is extremely critical. The material has to resist the extreme conditions at the point of injection considering pressure, temperature, pH, and the composition of agg...
Within the BMBF (German Federal Ministry for Economic Affairs and Energy) research project CLUSTER combined experimental mineralogical-geochemical and geomechanical investigations of the interaction of CO 2 streams with sandstone and cements at expected injection site conditions are carried out. The chosen sandstone (arkose/subarkose) belongs to th...
Corrosion experiments with non-irradiated U 3 Si 2-Al research reactor fuel samples were carried out in synthetic MgCl 2-rich brine to identify and quantify the secondary phases because depending on their composition and on their amount, such compounds can act as a sink for the radionuclide release in final repositories. Within the experimental per...
After injection the sealing of wells in deep geologic formations being considered for carbon capture and storage (CCS) must be tight and sustainable. Therefore the choice of a cement, used for sealing, is extremely critical. The material has to resist the extreme conditions at the point of injection considering pressure, temperature, pH, and the co...
After injection the sealing of wells in deep geologic formations being considered for carbon capture and storage (CCS) must be tight and sustainable. Therefore the choice of a cement, used for sealing, is extremely critical. The material has to resist the extreme conditions at the point of injection considering pressure, temperature, pH, and the co...
Within the BMBF (German Federal Ministry for Economic Affairs and Energy) research project CLUSTER combined experimental mineralogical-geochemical and geomechanical investigations of the interaction of CO2 streams with sandstone and cements at the injection site are carried out.
The chosen sandstone belongs to the Trendelburg beds of the Solling fo...
![Figure 3. PXRD of Rietveld analysis [36-38] of the used raw material....](profile/Kristoff-Svensson/publication/323280234/figure/fig1/AS:596045797007360@1519119800436/PXRD-of-Rietveld-analysis-36-38-of-the-used-raw-material-Three-crystalline-phases-and_Q320.jpg)
![Figure 4. PXRD of Rietveld analysis [36-38] of carbonated wollastonite...](profile/Kristoff-Svensson/publication/323280234/figure/fig2/AS:596045797003265@1519119800544/PXRD-of-Rietveld-analysis-36-38-of-carbonated-wollastonite-carbonated-at-333-K-2-MPa_Q320.jpg)
The reaction of wollastonite (CaSiO3) with CO2 in the presence of aqueous solutions (H2O) and varied temperature conditions (296 K, 323 K, and 333 K) was investigated. The educts (CaSiO3) and the products (CaCO3 and SiO2) were analyzed by scanning electron microscopy (SEM), powder X-ray diffraction (PXRD), and differential scanning calorimetry with...
Due to its porosity sandstone is considered and investigated as a potential host rock for deep geologic CO2 storage (BMWi project CLUSTER ‐ 03ET7031D). It is critical to know how CO2, including various byproducts (e.g. NO2, SO2), interacts with minerals at temperatures and pressures expected at the point of injection (~16 Mpa, 333 K). The impact of...
The sealing of deep geologic formations being considered for carbon capture and storage (CCS) must be sustainable. Therefore the choice of a durable cement, used for sealing, is critical. The material has to resist the extreme conditions at the point of injection considering pressure, temperature, pH, and the composition of aggressive fluids (chlor...
The sealing of deep geologic formations being considered for CCS must be sustainable. Therefore the choice of a durable cement, used for sealing, is critical. The material has to resist the extreme conditions at the point of injection considering pressure, temperature, pH, and the composition of aggressive fluids (chloride rich brines, scCO2 contam...
Im Projekt „Auswirkungen der Begleitstoffe in den abgeschiedenen CO2-Strömen
unterschiedlicher Emittenten eines regionalen Clusters auf Transport, Injektion und
Speicherung (CLUSTER)“ sollen Empfehlungen zur Definition von Mindestzusammensetzungsschwellen“ (Richtlinie 2009/31/EC) erarbeitet werden, denen CO2-Ströme bei ihrer Einspeisung in ein CO2-...
Cluster (www.bgr.bund.de/CLUSTER) is a research project funded by the German Federal Ministry for Economic Affairs and Energy (BMWi), that investigates the impact of CO 2 streams and mass flow for different scenarios along the CO 2 capture and storage chain (CCS). This work describes geomechanical behaviour changes in a reservoir rock caused by sup...
Corrosion experiments with non-irradiated metallic UAlx–Al research reactor fuel elements were carried out in autoclaves to identify and quantify the corrosion products. Such compounds, considering the long-term safety assessment of final repositories, can interact with the released inventory and this constitutes a sink for radionuclide migration i...
We explored the use of selected layered double hydroxides (LDHs) of different compositions and obtained by means of different routes (i.e., coprecipitation, anionic exchange and reconstruction) as iodine/iodate adsorbents. The influence of speciation (iodide vs. iodate) on iodine uptake was rather strong, resulting in much lower iodide incorporatio...
Due to their outstanding properties phosphate based ceramics of the monazite type are promising candidates for the immobilisation of the minor actinides. The minor actinides Am, Cm, and Np are problematic, because they contribute to the long-lived radiotoxicity of high level nuclear waste. We focus on Sm-monazite which exhibits the lowest melting p...
Monazite type ceramics are considered as potential ceramic storage materials for high level nuclear waste. Natural monazite is a host for radioactive elements like U and Th without becoming metamict due to radiation damage. Monazites are also known for their chemical flexibility and thermal stability. In this context, a solid solution series of (La...
Monazite-type ceramics are considered as an alternative matrix for high level nuclear waste. Besides an extensive chemical flexibility, long-term stability, and durability natural monazites can accommodate considerable amounts of Th and U [1,2]. Using the monazite-types LaPO4 and SmPO4 as endmembers, solid solutions were prepared, replacing 2 Sm3+...
The corrosion of the UAl𝑥-Al research reactor
fuel type in synthetic MgCl2-rich brine (static batch-type
experiments) was investigated with respect to the longterm
safety of directly disposed research reactor fuel elements
in salt formations. During corrosion, crystalline secondary
phases were formed, which may serve as a barrier
against radionucli...
Raman and infrared spectroscopic investigations were performed on synthetic lanthanide orthophosphates (LnPO(4)) within this study. Seven monoclinic monazite-type phosphates (Ln = La-Gd) were synthesised via precipitation route in aqueous solution at room temperature. Linear correlation between Raman band positions and the effective cationic radii...
Syntheses of Fe-, Co-, and Ni-containing Mg-Al-layered double hydroxides (LDHs) are described here because Fe, Co, and Ni represent the major constituents in steel containers used for storing spent nuclear fuel. Much evidence exists for the formation of LDHs during the corrosion of such containers under repository-relevant conditions. Because of th...
The conditioning of radioactive waste from nuclear power plants and in some countries even of weapons plutonium is an important issue for science and society. Therefore the research on appropriate matrices for the immobilization of fission products and actinides is of great interest. Beyond the widely used borosilicate glasses, ceramics are promisi...
A layered double hydroxides (LDH) hydrotalcite-pyroaurite solid solution series (Mg1-xFe(II)(x))(3)Al1Cl1. nH(2)O with variable xFe(solid) = Fe2+/(Fe2+ + Me2+) iron mole fractions were studied in co-precipitation experiments at T = 25, 40, 45, 50, 55 and 60 degrees C and pH = 10.00 +/- 0.05. The compositions of the solids and reaction solutions wer...
Corrosion experiments of unirradiated research reactor fuel elements were carried out under
repository relevant conditions in order to identify and quantify the secondary phases formed
by reactions with formation waters being expected in final repositories due to accidental
influx from the encompassing salt formation. This analysis is important for...
Ergebnisse aus den Korrosionsexperimenten mit bestrahlten FR-Kernbrennstoffen (UAlx- Al und U3Si2-Al-Dispersionsbrennstoffe) in MgCl2-reicher Salzlauge als auch in Tonporenwasser und in Wasser aus kristallinem Gestein zeigten, dass diese Kernbrennstoffe innerhalb der dreieinhalbjährigen Versuchsphase vollständig korrodierten. Für die Sicherheitsana...
In the framework of analysing the microstructure of hardened cement paste small angle X-ray/ neutron scattering (SAXS/ SANS) methods have recently proved to be very useful. In contrast to other methods no extensive specimen preparation, e.g. previous drying connected with well-known adverse effects, has to be carried out. In particular, this method...
Questions
Question (1)
I am curious whether the shelxl instruction EADP (or likewise instructions for the Anisotropic displacement parameters of other crystallographic software packages) for solid solutions must or should be applied mandatorily for cations which share the same atomic position. It makes sense e.g. for REE which have similar atomic weights. However, sometimes the replacing cation features approx. double the mass of the other cation e.g. Fe/Al, K/Na, Hf/Zr. Is there a rule of thumb?
