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01/2013 – today Montanuniversität Leoben, Austria Chair of Waste Processing Technology and Waste Management Work Group „Mineral Wastes, Landfills, Contaminated Sites“ Associate Professor (since 11/2020) Assistant Professor (11/2015 – 10/2020) Research Associate (until 10/2015) 04/2016 – 09/2016 Energy Research Centre of the Netherlands, Netherlands Guest Scientist: Hydrogeochemical Modelling using LeachXS 05/2008 – 01/2013 Graz University of Technology, Austria Institute of Applied Geosciences Research Associate 10/2003 – 04/2008 Diploma Studies of Mineralogy Technische Universität Bergakademie Freiberg, Germany Degree: Diplom-Mineraloge (≈ MSc; Grade: „very good“)
Sensor-based and robot sorting are key technologies in the extended value chain of many products such as packaging waste (glass, plastics) or building materials since these processes are significant contributors in reaching the EU recycling goals. Hence, technological developments and possibilities to improve these processes concerning data analytics are evaluated with an interview-based survey. The requirements to apply data analytics in sensor-based sorting are separated into different sections, i.e., data scope or consistency. The interviewed companies are divided into four categories: sorting machine manufacturers, sorting robot manufacturers, recycling plant operators, and sensor technology companies. This paper aims to give novel insights into the degree of implementation of data analytics in the Austrian waste management sector. As a result, maturity models are set up for these sections and evaluated for each of the interview partner categories. Interviewees expressed concerns regarding the implementation such as a perceived loss of control and, subsequently, a supposed inability to intervene. Nevertheless, further comments by the interviewees on the state of the waste management sector conveyed that data analytics in their processes would also be a significant step forward to achieve the European recycling goals.
Karl Friedrich; Theresa Fritz; Gerald Koinig; Roland Pomberger; Daniel Vollprecht. Assessment of Technological Developments in Data Analytics for Sensor-Based and Robot Sorting Plants Based on Maturity Levels to Improve Austrian Waste Sorting Plants. Sustainability 2021, 13, 9472 .
AMA StyleKarl Friedrich, Theresa Fritz, Gerald Koinig, Roland Pomberger, Daniel Vollprecht. Assessment of Technological Developments in Data Analytics for Sensor-Based and Robot Sorting Plants Based on Maturity Levels to Improve Austrian Waste Sorting Plants. Sustainability. 2021; 13 (16):9472.
Chicago/Turabian StyleKarl Friedrich; Theresa Fritz; Gerald Koinig; Roland Pomberger; Daniel Vollprecht. 2021. "Assessment of Technological Developments in Data Analytics for Sensor-Based and Robot Sorting Plants Based on Maturity Levels to Improve Austrian Waste Sorting Plants." Sustainability 13, no. 16: 9472.
Austrian soils from mainly historical mining and smelting sites were separated into four particle size fractions (coarse sand, fine sand, silt and clay) to distinguish the possible origins and pathways of heavy metals. Each fraction was extracted with aqua regia to determine the pseudo-total content and with CaCl2 to determine the available content of metals. The soil mineralogical composition of the < 2000 µm fraction was determined by X-ray diffraction (XRD). In general, the concentration of heavy metals and metalloids increased as soil particle size decreased. Based on the correlations of concentrations vs. the log of the mean particle size, obtained from each fraction the presence of unweathered allochthonous minerals were especially present in samples from locations at Rabenstein for most trace elements, at Arzwaldgraben for Cd, Co, Mn and Pb, at Johnsbach for Cd, Co, Mn, Pb and Zn and at Pilgersdorf for Cr. The opposite trend was found for the samples of the industrial area of Arnoldstein, Zeltweg and Hinterlobming suggesting that their metal load was derived from the discharge of effluents or from weathered phases.
Anto Jelecevic; Manfred Sager; Daniel Vollprecht; Markus Puschenreiter; Peter Liebhard. Partitioning of heavy metals in different particle-size fractions of soils from former mining and smelting locations in Austria. EURASIAN JOURNAL OF SOIL SCIENCE (EJSS) 2021, 10, 123 -131.
AMA StyleAnto Jelecevic, Manfred Sager, Daniel Vollprecht, Markus Puschenreiter, Peter Liebhard. Partitioning of heavy metals in different particle-size fractions of soils from former mining and smelting locations in Austria. EURASIAN JOURNAL OF SOIL SCIENCE (EJSS). 2021; 10 (2):123-131.
Chicago/Turabian StyleAnto Jelecevic; Manfred Sager; Daniel Vollprecht; Markus Puschenreiter; Peter Liebhard. 2021. "Partitioning of heavy metals in different particle-size fractions of soils from former mining and smelting locations in Austria." EURASIAN JOURNAL OF SOIL SCIENCE (EJSS) 10, no. 2: 123-131.
Zusammenfassung Ökodesign ist ein Konzept zur Gestaltung von Produkten, dessen Ziel es ist, die Umweltbelastung zu verringern. Theoretische, praktische und reale Recyclingfähigkeit sind Eigenschaften eines Produktes, am Ende seines Lebenszyklus stofflich verwertet werden zu können, wobei „Recycling“ stets impliziert, dass das Produkt zeitweilig zu Abfall wird. Stahlwerksschlacken werden im pyrometallurgischen Prozess gezielt durch die Zugabe von Schlackenbildnern erzeugt und erfüllen dort eine Funktion, indem sie die im Stahl unerwünschten Begleitelemente der eingesetzten geogenen oder anthropogenen Erze aufnehmen. Stahlwerksschlacken sind somit jedenfalls im Hinblick auf die metallurgische Nutzungsphase Produkt, können aber an deren Ende – je nach Judikatur – Abfall werden oder Nebenprodukt sein. In beiden Fällen handelt es sich um Reststoffe, die als industriell hergestellte Gesteinskörnungen Sekundärrohstoffe für den Straßenbau darstellen. Die thermochemische Behandlung von Stahlwerksschlacken im flüssigen Zustand kann die Freisetzung umweltrelevanter Elemente in Poren- und Grundwässer und damit die Umweltbelastung verringern, indem diese Elemente in stabilen Mineralphasen eingebaut und/oder nach einer anfänglichen Freisetzung wieder an deren Oberflächen adsorbiert werden können. Diese gezielte Steuerung der Produktionsbedingungen von Stahlwerksschlacken stellt somit ein Beispiel für Ökodesign dar und ist zudem für jene Fälle, in denen die Schlacke zu Abfall wird, ein wesentlicher Beitrag zur Erhöhung der theoretischen Recyclingfähigkeit der Schlacke, die in diesem Spezialfall mit der praktischen und realen Recyclingfähigkeit zusammenfällt.
Daniel Vollprecht; Roland Pomberger. Ökodesign von Stahlwerksschlacken durch thermochemische Behandlung zur Erhöhung der Recyclingfähigkeit. BHM Berg- und Hüttenmännische Monatshefte 2021, 166, 137 -143.
AMA StyleDaniel Vollprecht, Roland Pomberger. Ökodesign von Stahlwerksschlacken durch thermochemische Behandlung zur Erhöhung der Recyclingfähigkeit. BHM Berg- und Hüttenmännische Monatshefte. 2021; 166 (3):137-143.
Chicago/Turabian StyleDaniel Vollprecht; Roland Pomberger. 2021. "Ökodesign von Stahlwerksschlacken durch thermochemische Behandlung zur Erhöhung der Recyclingfähigkeit." BHM Berg- und Hüttenmännische Monatshefte 166, no. 3: 137-143.
The “European Union Training Network for Resource Recovery Through Enhanced Landfill Mining (NEW-MINE)” was a European research project conducted between 2016 and 2020 to investigate the exploration of and resource recovery from landfills as well as the processing of the excavated waste and the valorization of the obtained waste fractions using thermochemical processes. This project yielded more than 40 publications ranging from geophysics via mechanical process engineering to ceramics, which have not yet been discussed coherently in a review publication. This article summarizes and links the NEW-MINE publications and discusses their practical applicability in waste management systems. Within the NEW-MINE project in a first step concentrates of specific materials (e.g., metals, combustibles, inert materials) were produced which might be used as secondary raw materials. In a second step, recycled products (e.g., inorganic polymers, functional glass-ceramics) were produced from these concentrates at the lab scale. However, even if secondary raw materials or recycled products could be produced at a large scale, it remains unclear if they can compete with primary raw materials or products from primary raw materials. Given the ambitions of transition towards a more circular economy, economic incentives are required to make secondary raw materials or recycled products from enhanced landfill mining (ELFM) competitive in the market.
Daniel Vollprecht; Lieven Machiels; Peter Jones. The EU Training Network for Resource Recovery through Enhanced Landfill Mining—A Review. Processes 2021, 9, 394 .
AMA StyleDaniel Vollprecht, Lieven Machiels, Peter Jones. The EU Training Network for Resource Recovery through Enhanced Landfill Mining—A Review. Processes. 2021; 9 (2):394.
Chicago/Turabian StyleDaniel Vollprecht; Lieven Machiels; Peter Jones. 2021. "The EU Training Network for Resource Recovery through Enhanced Landfill Mining—A Review." Processes 9, no. 2: 394.
Experiments with sensor-based sorting (SBS) machinery provide insight into the effect of throughput rate and input composition on the sorting performance. For this purpose, material mixtures with certain compositions and particle size distributions were created from waste fractions and sorted at various throughput rates. To evaluate the sorting performance of the SBS unit (using near infrared technology) in dependence of the applied load, four assessment factors concerning the output fractions were studied: yield, product purity, recovery/product quantity and incorrectly discharged share of reject particles. The influences on the assessment parameters of light twodimensional (2D) particles in the input of a sorting stage and failing air valves in an SBS unit were evaluated for various input compositions at different throughput rates. It was found that a share of approximately 5 wt% 2D particles in the input had a similar negative effect on the yield as the malfunction of 20% of all air valves in an SBS machine at high throughput rates. Additionally, the failure of the air valves reduced the product purity of the sorting stage at increased throughput rates. Furthermore, qualitative observations concerning systematic effects of prior studies could be confirmed. Resulting graphs for a specific input composition of an SBS unit at varying throughput rates could be used to adjust the throughput rate to meet the exact demands for a sorting stage.
Bastian Küppers; Sabine Schlögl; Karl Friedrich; Laura Lederle; Celestine Pichler; Julia Freil; Roland Pomberger; Daniel Vollprecht. Influence of material alterations and machine impairment on throughput related sensor-based sorting performance. Waste Management & Research: The Journal for a Sustainable Circular Economy 2020, 39, 122 -129.
AMA StyleBastian Küppers, Sabine Schlögl, Karl Friedrich, Laura Lederle, Celestine Pichler, Julia Freil, Roland Pomberger, Daniel Vollprecht. Influence of material alterations and machine impairment on throughput related sensor-based sorting performance. Waste Management & Research: The Journal for a Sustainable Circular Economy. 2020; 39 (1):122-129.
Chicago/Turabian StyleBastian Küppers; Sabine Schlögl; Karl Friedrich; Laura Lederle; Celestine Pichler; Julia Freil; Roland Pomberger; Daniel Vollprecht. 2020. "Influence of material alterations and machine impairment on throughput related sensor-based sorting performance." Waste Management & Research: The Journal for a Sustainable Circular Economy 39, no. 1: 122-129.
Based on recently published research on leaching control mechanisms in electric arc furnace (EAF) slags, it is assumed that a FeO/SiO2 ratio of around one leads to low leached V and Cr concentrations. This ratio influences the mineral phase composition of the slag toward higher amounts of spinel and a lower solubility of calcium silicate phases by suppressing the formation of magnesiowuestite and highly soluble calcium silicate phases. To evaluate this hypothesis, laboratory and scaled up tests in an EAF pilot plant were performed on slag samples characterized by elevated V and Cr leaching and a high FeO/SiO2 ratio. Prior to the melting experiments, the optimum FeO/SiO2 ratio was calculated via FactSageTM. In the melting experiments, the ratio was adjusted by adding quartz sand, which also decreased the basicity (CaO/SiO2) of the slag. As a reference, remelting experiments without quartz sand addition were conducted and additionally, the influence of the cooling rate of the slag was examined. The remelted (without quartz sand) and the remelted modified slags (with quartz sand) were analyzed chemically and mineralogically and the leaching behavior was investigated. The modification of the slags yielded a minimized release of V and Cr, supporting the hypothesis that the FeO/SiO2 ratio influences the mineralogy and the leaching behavior.
Simone Neuhold; David Algermissen; Peter Drissen; Burkart Adamczyk; Peter Presoly; Klaus P. Sedlazeck; Johannes Schenk; Johann G. Raith; Roland Pomberger; Daniel Vollprecht. Tailoring the FeO/SiO2 Ratio in Electric Arc Furnace Slags to Minimize the Leaching of Vanadium and Chromium. Applied Sciences 2020, 10, 2549 .
AMA StyleSimone Neuhold, David Algermissen, Peter Drissen, Burkart Adamczyk, Peter Presoly, Klaus P. Sedlazeck, Johannes Schenk, Johann G. Raith, Roland Pomberger, Daniel Vollprecht. Tailoring the FeO/SiO2 Ratio in Electric Arc Furnace Slags to Minimize the Leaching of Vanadium and Chromium. Applied Sciences. 2020; 10 (7):2549.
Chicago/Turabian StyleSimone Neuhold; David Algermissen; Peter Drissen; Burkart Adamczyk; Peter Presoly; Klaus P. Sedlazeck; Johannes Schenk; Johann G. Raith; Roland Pomberger; Daniel Vollprecht. 2020. "Tailoring the FeO/SiO2 Ratio in Electric Arc Furnace Slags to Minimize the Leaching of Vanadium and Chromium." Applied Sciences 10, no. 7: 2549.
Fine fractions obtained by mechanical processing of excavated waste constitute a challenge for (enhanced) landfill mining projects. These fractions are mainly composed of humified organic and weathered inorganic compounds, whereas metals and calorific fractions are depleted. In this study we present data on the chemical composition and grain size distribution of the fine fractions <4.5 mm, as well as on the mineralogical composition of the two finest subfractions (0.18 to 0.5 mm and <0.18 mm). Chemical analyses indicate no trend regarding the enrichment or depletion of heavy metals in the different particle size ranges. Leaching from the finer fractions is somewhat higher than from the coarser fractions (i.e. 1.6 to 4.5 mm and 0.5 to 1.6 mm), although the fraction 0.18 to 0.5 mm shows the lowest overall leaching. Pseudo-total contents of Cu, Zn, Cd, Hg and Pb and leachable contents of Ni exceed Austrian limit values for the production of soil substitutes from wastes. Electron microprobe analyses indicate that Zn and Pb, which exceed limit values for pseudo-total content, are present as Fe-Zn alloy, ZnS and ZnSO4, and metallic Pb and Pb-Ca phosphate, respectively. In summary, dry-mechanical processing, which is a feasible method in the particle size range >4.5 mm, showed a limited effect in the range <4.5 mm. Removal of Pb- and Zn-containing phases is highly challenging due to the diverse mineralogy and fine grain size of few µm. Consequently, it seems unlikely that the Austrian limit values for soil substitutes can be met.
Daniel Vollprecht; Juan Carlos Hernández Parrodi; Hugo Ignacio Lucas; Roland Pomberger. CASE STUDY ON ENHANCED LANDFILL MINING AT MONT-SAINT-GUIBERT LANDFILL IN BELGIUM: MECHANICAL PROCESSING, PHYSICO-CHEMICAL AND MINERALOGICAL CHARACTERIZATION OF FINE FRACTIONS <4.5 MM. Detritus 2020, 26 -43.
AMA StyleDaniel Vollprecht, Juan Carlos Hernández Parrodi, Hugo Ignacio Lucas, Roland Pomberger. CASE STUDY ON ENHANCED LANDFILL MINING AT MONT-SAINT-GUIBERT LANDFILL IN BELGIUM: MECHANICAL PROCESSING, PHYSICO-CHEMICAL AND MINERALOGICAL CHARACTERIZATION OF FINE FRACTIONS <4.5 MM. Detritus. 2020; (10):26-43.
Chicago/Turabian StyleDaniel Vollprecht; Juan Carlos Hernández Parrodi; Hugo Ignacio Lucas; Roland Pomberger. 2020. "CASE STUDY ON ENHANCED LANDFILL MINING AT MONT-SAINT-GUIBERT LANDFILL IN BELGIUM: MECHANICAL PROCESSING, PHYSICO-CHEMICAL AND MINERALOGICAL CHARACTERIZATION OF FINE FRACTIONS <4.5 MM." Detritus , no. 10: 26-43.
The fine fractions account for the largest share of material recovered through (enhanced) landfill mining. These fractions typically present challenging characteristics for processing and valorization methods and, hence, they have been largely discarded in previous landfill mining projects. This situation has hindered the economic and environmental feasibility of landfill mining, since most of the excavated waste has been directed back into the landfill. Therefore, the fine fractions are one of the major challenges faced by (enhanced) landfill mining and suitable material and energy recovery schemes for these fractions need to be further developed and, if necessary, created. To this end, the physico-chemical characteristics of the “Combustibles” and “Inert” fractions recovered from the fine fractions <90 mm through a dry-mechanical process have been determined and their suitability for waste-to-material and waste-to-energy schemes has been evaluated in the MSG case study. The recovered “Combustibles” fractions represented 12.5 wt.% and 9.0 wt.% of the fine fractions <90 mm processed in the optimal water content and dry states, while the recovered “Inert” fractions accounted for 35.5 wt.% and 37.2 wt.%, respectively. According to the EN 15359:2011, the “Combustibles” fractions could be valorized as SRF in (co-)incineration, power and cement plants in both the optimal water content state and the dry state in the EU. However, in Austria these fractions can only be incinerated and not co-incinerated according to the Austrian Waste Incineration Ordinance (AVV), since in some cases they present concentrations of As, Cd, Co, Hg and Pb above the limit values. Therefore, in contrast to conventional (co-)incineration, the plasma gasification process proposed by the NEW-MINE project might offer a potential waste-to-energy valorization route for the combustible fractions obtained from the fine fractions of landfill-mined waste. As for the “Inert” fractions, there is no overarching legislation in the EU to regulate such materials yet in place and, hence, these fractions are solely subject to national or local regulations on recycling building materials. In Austria the “Inert” fractions would need further treatment in order to be valorized as a substitute for construction aggregates according to the Austrian Recycling Building Materials Ordinance (RBV), as they exceed the limit values for hydrocarbons, Cd, Pb, Zn, NH4+ and anionic surfactants in certain cases. Therefore, suitable waste-to-material valorization schemes for the recovered inert fractions from the fine fractions of landfill-mined waste are to be further developed, while appropriate overarching regulations need to be created at EU level.
Juan Carlos Hernández Parrodi; Daniel Vollprecht; Roland Pomberger. CASE STUDY ON ENHANCED LANDFILL MINING AT MONT- SAINT-GUIBERT LANDFILL IN BELGIUM: PHYSICO-CHEMICAL CHARACTERIZATION AND VALORIZATION POTENTIAL OF COMBUSTIBLES AND INERT FRACTIONS RECOVERED FROM FINE FRACTIONS. Detritus 2020, 44 -61.
AMA StyleJuan Carlos Hernández Parrodi, Daniel Vollprecht, Roland Pomberger. CASE STUDY ON ENHANCED LANDFILL MINING AT MONT- SAINT-GUIBERT LANDFILL IN BELGIUM: PHYSICO-CHEMICAL CHARACTERIZATION AND VALORIZATION POTENTIAL OF COMBUSTIBLES AND INERT FRACTIONS RECOVERED FROM FINE FRACTIONS. Detritus. 2020; (10):44-61.
Chicago/Turabian StyleJuan Carlos Hernández Parrodi; Daniel Vollprecht; Roland Pomberger. 2020. "CASE STUDY ON ENHANCED LANDFILL MINING AT MONT- SAINT-GUIBERT LANDFILL IN BELGIUM: PHYSICO-CHEMICAL CHARACTERIZATION AND VALORIZATION POTENTIAL OF COMBUSTIBLES AND INERT FRACTIONS RECOVERED FROM FINE FRACTIONS." Detritus , no. 10: 44-61.
The correct presentation of the 4th sentence in the 2nd paragraph of section Remediation method is shown in this paper.
Klaus Philipp Sedlazeck; Daniel Vollprecht; Peter Müller; Robert Mischitz; Reto Gieré. Correction to: impact of an in-situ Cr(VI)-contaminated site remediation on the groundwater. Environmental Science and Pollution Research 2020, 27, 14476 -14476.
AMA StyleKlaus Philipp Sedlazeck, Daniel Vollprecht, Peter Müller, Robert Mischitz, Reto Gieré. Correction to: impact of an in-situ Cr(VI)-contaminated site remediation on the groundwater. Environmental Science and Pollution Research. 2020; 27 (13):14476-14476.
Chicago/Turabian StyleKlaus Philipp Sedlazeck; Daniel Vollprecht; Peter Müller; Robert Mischitz; Reto Gieré. 2020. "Correction to: impact of an in-situ Cr(VI)-contaminated site remediation on the groundwater." Environmental Science and Pollution Research 27, no. 13: 14476-14476.
Landfilling of mineral wool waste in big bags at separate landfill compartments is required in Austria. This results in enormous differences in the Young’s moduli between common construction and demolition (C&D) waste compartments and mineral wool compartments, which causes severe accidents in terms of overturned vehicles due to sudden subsidence of the subsurface. Conditioning of mineral wool waste might be applied to adjust its geomechanical behaviour to that of common C&D waste but has never been investigated scientifically before. In this study we compare three scenarios for the conditioning of rock wool for landfilling: (A) loosely packing, (B) cutting comminution + cement addition and (C) cutting comminution + cement-supported briquetting. The performance of the different sample bodies under landfill conditions was simulated at the lab scale by cyclic loading (1223–3112 N, up to 160 cycles) using a ‘Wille Geotechnik UL 300’ press. The deformation was monitored during the experiment and Young’s modulus was derived graphically, whereas the test execution was piston controlled. The Young’s modulus increased during the experiments from 0.2 MPa to 4.6 MPa for scenario (A), from 0.6 MPa to 20.5 MPa for scenario (B) and from 7.5 MPa to 111.0 MPa for scenario (C). These results show that a combination of comminution and cement-supported briquetting significantly increases the geotechnical performance of mineral wool waste with respect to landfilling, which is still three orders of magnitude below that of common C&D waste, which is in the range of 30,000 MPa.
Theresa Sattler; Marco Sartori; Robert Galler; Roland Pomberger; Jörg Krainz; Julia Schimek; Daniel Vollprecht. Effects of cement addition and briquetting of rock wool on its geomechanical stability in landfills. Waste Management & Research: The Journal for a Sustainable Circular Economy 2020, 38, 408 -414.
AMA StyleTheresa Sattler, Marco Sartori, Robert Galler, Roland Pomberger, Jörg Krainz, Julia Schimek, Daniel Vollprecht. Effects of cement addition and briquetting of rock wool on its geomechanical stability in landfills. Waste Management & Research: The Journal for a Sustainable Circular Economy. 2020; 38 (4):408-414.
Chicago/Turabian StyleTheresa Sattler; Marco Sartori; Robert Galler; Roland Pomberger; Jörg Krainz; Julia Schimek; Daniel Vollprecht. 2020. "Effects of cement addition and briquetting of rock wool on its geomechanical stability in landfills." Waste Management & Research: The Journal for a Sustainable Circular Economy 38, no. 4: 408-414.
Geogenic metal contaminations in soils are intensely discussed in waste management, as the recyclability of excavated soil is regulated by limit values for pseudo-total contents in Austria. However, the use of pseudo-total contents overestimates the release of some contaminants such as metals into the environment. Sequential extraction provides an empiric tool to better assess the mobility of metals and predicts their bonding type in individual fractions, but the relation between the obtained fractions and the exact mineralogical bonding is often unclear. Electron microprobe analyses provide detailed mineralogical insights, but do not yield direct information about the mobility of elements. A combination of both methods has been used a few times in soil sciences in general, but never to Styrian soils. Thus, six geogenic contaminated Styrian soils and one compost soil were investigated by a method combination of sequential chemical extraction and electron microprobe analyses. Sequential extraction suggested that Cr in five substrates and As and Ni in one substrate each are bound in stable crystalline minerals, whereas Pb in four samples and Cu in two samples are adsorbed to iron and manganese hydroxides. Elemental mappings obtained by electron microprobe analyses confirmed sequential chemical extraction results and specified that Cu and Pb are bound to manganese (hydr)oxides, As to Fe–Cu–Sb–S compounds, Cr to spinels and Ni to olivine. In summary, the current study gives new information about the mobility and mineralogy of metals in six Styrian soils which is relevant for their possible recycling despite exceeded limit values for pseudo-total content.
D. Vollprecht; C. Riegler; F. Ahr; S. Stuhlpfarrer; M. Wellacher. Sequential chemical extraction and mineralogical bonding of metals from Styrian soils. International Journal of Environmental Science and Technology 2020, 17, 3663 -3676.
AMA StyleD. Vollprecht, C. Riegler, F. Ahr, S. Stuhlpfarrer, M. Wellacher. Sequential chemical extraction and mineralogical bonding of metals from Styrian soils. International Journal of Environmental Science and Technology. 2020; 17 (8):3663-3676.
Chicago/Turabian StyleD. Vollprecht; C. Riegler; F. Ahr; S. Stuhlpfarrer; M. Wellacher. 2020. "Sequential chemical extraction and mineralogical bonding of metals from Styrian soils." International Journal of Environmental Science and Technology 17, no. 8: 3663-3676.
Zero-valent iron (ZVI) has been used for water treatment for more than 160 years. However, passivation of its surface often constituted a problem which could only be tackled recently by the innovative Ferrodecont process using a fluidized bed reactor. In this study, pilot scale experiments for the removal of Mo, Cr, W, Cu, Ag and Zn from two industrial waste water samples and lab-scale experiments for the beneficiation of the abrasion products are presented to integrate the Ferrodecont process into a complete recycling process chain. Firstly, 38.5 % of Cu was removed from sample A, yielding abrasion products containing 33.1 wt% Cu as metallic copper (Cu) and various Cu compounds. The treatment of sample B removed 99.8 % of Mo, yielding abrasion products containing 17.8 wt% of Mo as amorphous phases or adsorbed species. Thermal treatment (1300 °C) of the abrasion product A indicated a reduction of delafossite to metallic Cu according to differential scanning calorimetry (DSC), thermogravimetry (TG) and X-ray diffraction (XRD), which was successfully separated from the magnetic iron phases. Hydrometallurgical treatment (1.5 M NaOH, 3 d, liquid:solid ratio (L:S) = 15:1) of sample B yielded aqueous extracts with Mo concentrations of 5820 to 6300 mgL−1. In conclusion, this corresponds to an up to 53-fold enrichment of Mo during the entire process chain.
Daniel Vollprecht; Katharina Plessl; Simone Neuhold; Fritz Kittinger; Wolfgang Öfner; Peter Müller; Robert Mischitz; Klaus Philipp Sedlazeck. Recovery of Molybdenum, Chromium, Tungsten, Copper, Silver, and Zinc from Industrial Waste Waters Using Zero-Valent Iron and Tailored Beneficiation Processes. Processes 2020, 8, 279 .
AMA StyleDaniel Vollprecht, Katharina Plessl, Simone Neuhold, Fritz Kittinger, Wolfgang Öfner, Peter Müller, Robert Mischitz, Klaus Philipp Sedlazeck. Recovery of Molybdenum, Chromium, Tungsten, Copper, Silver, and Zinc from Industrial Waste Waters Using Zero-Valent Iron and Tailored Beneficiation Processes. Processes. 2020; 8 (3):279.
Chicago/Turabian StyleDaniel Vollprecht; Katharina Plessl; Simone Neuhold; Fritz Kittinger; Wolfgang Öfner; Peter Müller; Robert Mischitz; Klaus Philipp Sedlazeck. 2020. "Recovery of Molybdenum, Chromium, Tungsten, Copper, Silver, and Zinc from Industrial Waste Waters Using Zero-Valent Iron and Tailored Beneficiation Processes." Processes 8, no. 3: 279.
According to Directive (EU) 2018/851 of the European Union, higher recycling rates for municipal waste have to be met in the near future. Besides improvements in the collection systems, the mechanical processing and sorting efficiencies need to be increased to reach the EU´s targets. Sensor-based sorting (SBS) plants constitute an integral part of today's sorting processes. Two main factors influence the sorting performance, namely the throughput rate and the input composition. To improve recycling efficiencies, especially SBS machines must be adjusted accordingly to guarantee the highest possible machine efficiency. Three evaluation criteria, yield/product quantity, product yield, and product purity, are used to describe the performance of these processes. Therefore in this study, 160 sorting trials with 1,000 red and white low-density polyethylene (LDPE) chips were conducted to investigate the influence of the throughput rate and input composition on the sorting processes. For each evaluation criteria, the testing results are plotted in graphs enabling the possibility for process optimization. With increasing throughput rates, the product quantity rises (despite an exponential decrease in yield) in the form of a saturation curve. A higher throughput rate also results in an exponential decrease of the product yield, while a change in the input composition has no effect on the product yield. The third evaluation criteria, the product purity, decreases linearly with an increasing occupation density. The slope of this function depends on the input composition.
Bastian Küppers; Irina Seidler; Gerald Rudolf Koinig; Roland Pomberger; Daniel Vollprecht. INFLUENCE OF THROUGHPUT RATE AND INPUT COMPOSITION ON SENSOR-BASED SORTING EFFICIENCY. Detritus 2020, 59 -67.
AMA StyleBastian Küppers, Irina Seidler, Gerald Rudolf Koinig, Roland Pomberger, Daniel Vollprecht. INFLUENCE OF THROUGHPUT RATE AND INPUT COMPOSITION ON SENSOR-BASED SORTING EFFICIENCY. Detritus. 2020; (9):59-67.
Chicago/Turabian StyleBastian Küppers; Irina Seidler; Gerald Rudolf Koinig; Roland Pomberger; Daniel Vollprecht. 2020. "INFLUENCE OF THROUGHPUT RATE AND INPUT COMPOSITION ON SENSOR-BASED SORTING EFFICIENCY." Detritus , no. 9: 59-67.
Mineral wool products are man-made vitreous fibres that are used as thermal and acoustic insulation materials and as substrates for horticulture. Mineral wool waste is generated from demolition activities by the building and construction industry. Unfavourable mechanical properties, such as low compressibility, elastic behaviour, high volume and low bulk density, cause problems in landfills when mineral wool waste is disposed of. Mineral wool waste with a certain content of carcinogenic fibres is classified as hazardous waste type 31437 g “Asbestos Waste, Asbestos Dust” in Austria, since some characteristics of such fibres are similar to those of asbestos fibres. An exception is those mineral wool materials that have been tested to be noncarcinogenic due to their characteristics of biological solubility or geometrical dimension. Such noncarcinogenic mineral wool waste is classified as non-hazardous waste type 31416 “Mineral fibres”. Generally, it can be assumed that most of the industrial producers of mineral wool in the EU have not been producing carcinogenic material since 1998; however, carcinogenic mineral wool material has not yet been banned in Austria. Therefore, a segregation between so-called “old” and “new” mineral wool material is not necessarily possible. The medical aspects of mineral wool products are still controversial. The International Agency for Research on Cancer (IARC) evaluated mineral wool (glass wool and rock wool) as “possibly carcinogenic” in 1988 but revised this evaluation to “inadequate evidence in humans for the carcinogenicity” in 2002. Fibrous dusts that reach the alveolar region of the lungs undergo a congruent or incongruent chemical dissolution process. Alveolar macrophages ingest the intruded fibres and fulfil anti-infection and clearance functions. Biosolubility is a key property of this process. The recycling of mineral wool waste has not yet been performed in Austria due to economic inefficiency, technical problems and suspected health issues. However, some recycling and processing options already exist; other options are investigated in the project RecyMin, which compares different concepts with respect to environmental and economic criteria.
Theresa Sattler; Roland Pomberger; Julia Schimek; Daniel Vollprecht. MINERAL WOOL WASTE IN AUSTRIA, ASSOCIATED HEALTH ASPECTS AND RECYCLING OPTIONS. Detritus 2020, 174 -180.
AMA StyleTheresa Sattler, Roland Pomberger, Julia Schimek, Daniel Vollprecht. MINERAL WOOL WASTE IN AUSTRIA, ASSOCIATED HEALTH ASPECTS AND RECYCLING OPTIONS. Detritus. 2020; (9):174-180.
Chicago/Turabian StyleTheresa Sattler; Roland Pomberger; Julia Schimek; Daniel Vollprecht. 2020. "MINERAL WOOL WASTE IN AUSTRIA, ASSOCIATED HEALTH ASPECTS AND RECYCLING OPTIONS." Detritus , no. 9: 174-180.
This study presents the latest results of the groundwater monitoring of a research project, which tested an innovative pump and treat method in combination with an in-situ remediation. This technique was assessed on an abandoned site in Austria, where two hot spots of hexavalent chromium (Cr(VI)) were located. For the in-situ remediation, a strong reducing agent (sodium dithionite) was injected into the underground to reduce Cr(VI) to Cr(III) by using different injection strategies. Throughout this treatment, part of the Cr(VI) is mobilized and not instantly reduced. To prevent a further spreading of the mobilized Cr(VI), the pump and treat method, which uses zero-valent iron to clean the groundwater, was installed downgradient of the hot spots. Based on the groundwater sample analyses, it was possible to distinguish different remediation phases, characterized by excess chromate and excess sulfite. During the excess sulfite conditions, Cr(VI) was successfully removed from the system, but after terminating the sodium dithionite injection, the Cr(VI) rebounded.
Klaus Philipp Sedlazeck; Daniel Vollprecht; Peter Müller; Robert Mischitz; Reto Gieré. Impact of an in-situ Cr(VI)-contaminated site remediation on the groundwater. Environmental Science and Pollution Research 2020, 27, 14465 -14475.
AMA StyleKlaus Philipp Sedlazeck, Daniel Vollprecht, Peter Müller, Robert Mischitz, Reto Gieré. Impact of an in-situ Cr(VI)-contaminated site remediation on the groundwater. Environmental Science and Pollution Research. 2020; 27 (13):14465-14475.
Chicago/Turabian StyleKlaus Philipp Sedlazeck; Daniel Vollprecht; Peter Müller; Robert Mischitz; Reto Gieré. 2020. "Impact of an in-situ Cr(VI)-contaminated site remediation on the groundwater." Environmental Science and Pollution Research 27, no. 13: 14465-14475.
Plastic recyclates are granulates which are produced by the processing of plastic wastes. The circular economy package of the EU, especially the amendment of the Waste Framework Directive, sets a new goal for the use of different types of these recyclates. Corresponding primary raw materials can assure reliable qualities with respect to stable physical and chemical properties. Besides, the production of recyclates is often even more expensive than the production of primary raw material granulates. Several quality assurance measures are carried out along the value chain from plastic waste to final plastic products. Recyclates are evidently priced based on the price of primary raw material granulate. Pricing also correlates with different quality parameters, however, such as degree of mixing, degree of degradation and presence of impurities. This paper examines the correlation between different quality features and how they affect the pricing policy for recyclates. Experts and Stakeholders along the value chain of plastic recycling in Austria and Germany have been interviewed about the most important quality assurance parameters and how they (would) affect prices of recyclates. Therefore, quality parameters for the sorted plastic waste as an input for plastic waste recycling companies and manufactured recyclates are included in this paper. Experts from the plastic waste recycling industry confirmed that there is a profound correlation between price and quality that is presented and discussed in the paper: The higher the quality of the recyclates, the lower the level of impurities and the purer the recyclates, the higher the price.
Karl Friedrich; Selina Möllnitz; Stephan Holzschuster; Roland Pomberger; Daniel Vollprecht; Renato Sarc. BENCHMARK ANALYSIS FOR PLASTIC RECYCLATES IN AUSTRIAN WASTE MANAGEMENT. Detritus 2019, 105 -112.
AMA StyleKarl Friedrich, Selina Möllnitz, Stephan Holzschuster, Roland Pomberger, Daniel Vollprecht, Renato Sarc. BENCHMARK ANALYSIS FOR PLASTIC RECYCLATES IN AUSTRIAN WASTE MANAGEMENT. Detritus. 2019; (9):105-112.
Chicago/Turabian StyleKarl Friedrich; Selina Möllnitz; Stephan Holzschuster; Roland Pomberger; Daniel Vollprecht; Renato Sarc. 2019. "BENCHMARK ANALYSIS FOR PLASTIC RECYCLATES IN AUSTRIAN WASTE MANAGEMENT." Detritus , no. 9: 105-112.
A heavy non-ferrous metal fraction (< 50 mm) of municipal solid waste incineration bottom ashes from wet-mechanical treatment was separated by screening, magnetic separation and eddy-current separation into ferrous metals, non-ferrous metals and residual sub-fractions. The non-ferrous metal fractions were divided and subjected to (i) a washing process, (ii) dry abrasion and (iii) no mechanical pre-treatment to study the effect of resulting different surface properties on a subsequent X-ray fluorescence sorting into precious metals, zinc, copper, brass, stainless steel and a residual fraction. The qualities of the X-ray fluorescence output fractions were investigated by chemical analyses (precious metal fraction and the residual fraction), pyrometallurgical tests and subsequent chemical analyses of the metals and slags produced by the melting processes (zinc, copper, brass and stainless steel fraction). Screening directs brass and stainless steel primarily into the coarser fractions, while copper and residual elements were rather transferred into the finer fractions. X-ray fluorescence sorting yielded zinc, copper, brass, stainless steel and precious metals fractions in marketable qualities. Neither a negative nor a positive impact of mechanical pre-treatment on the composition of these fractions was identified. Solely the yield of the brass fraction in the grain size 16–20 mm decreased with increasing mechanical pre-treatment. The pre-treatment also had no impact on yield and quality of the products of pyrometallurgical tests.
Kerstin Pfandl; Bastian Küppers; Stefanie Scheiber; Gerhard Stockinger; Johannes Holzer; Roland Pomberger; Helmut Antrekowitsch; Daniel Vollprecht. X-ray fluorescence sorting of non-ferrous metal fractions from municipal solid waste incineration bottom ash processing depending on particle surface properties. Waste Management & Research: The Journal for a Sustainable Circular Economy 2019, 38, 111 -121.
AMA StyleKerstin Pfandl, Bastian Küppers, Stefanie Scheiber, Gerhard Stockinger, Johannes Holzer, Roland Pomberger, Helmut Antrekowitsch, Daniel Vollprecht. X-ray fluorescence sorting of non-ferrous metal fractions from municipal solid waste incineration bottom ash processing depending on particle surface properties. Waste Management & Research: The Journal for a Sustainable Circular Economy. 2019; 38 (2):111-121.
Chicago/Turabian StyleKerstin Pfandl; Bastian Küppers; Stefanie Scheiber; Gerhard Stockinger; Johannes Holzer; Roland Pomberger; Helmut Antrekowitsch; Daniel Vollprecht. 2019. "X-ray fluorescence sorting of non-ferrous metal fractions from municipal solid waste incineration bottom ash processing depending on particle surface properties." Waste Management & Research: The Journal for a Sustainable Circular Economy 38, no. 2: 111-121.
In this study, possible leaching control mechanisms for Cr and V in electric arc furnace slags were investigated by using a multi-methodological approach. Aside from chemical and mineralogical bulk analyses, special emphasis was given to surface investigations of the slags prior to and after leaching. In addition, pH dependence leaching tests were performed and the obtained data were evaluated with hydrogeochemical models. Investigations revealed that Cr and V are mainly bound in spinel and wuestite as well as minor amounts of olivine. Spinel and wuestite do not dissolve during water leaching for 48 h, whereas, depending on the composition of olivine, this phase either dissolves and releases V and Cr congruently, or does not dissolve but may hydrate. Melilite may also hydrate, but neither V nor Cr were detected in this phase. It appears that leached V is subsequently adsorbed onto these newly hydrated phases. The combination of the applied methods further showed that the abundance of calcium silicates, spinel, and wuestite is influenced by the FeO/SiO2 and CaO/SiO2 ratio in the slag. Therefore, it is assumed that the leaching of V and Cr can be minimized by changing these ratios to favor the formation of Fe bearing calcium silicate and spinel instead of wuestite.
Simone Neuhold; André Van Zomeren; Joris J. Dijkstra; Hans A. Van Der Sloot; Peter Drissen; David Algermissen; Dirk Mudersbach; Susanne Schüler; Thomas Griessacher; Johann G. Raith; Roland Pomberger; Daniel Vollprecht. Investigation of Possible Leaching Control Mechanisms for Chromium and Vanadium in Electric Arc Furnace (EAF) Slags Using Combined Experimental and Modeling Approaches. Minerals 2019, 9, 525 .
AMA StyleSimone Neuhold, André Van Zomeren, Joris J. Dijkstra, Hans A. Van Der Sloot, Peter Drissen, David Algermissen, Dirk Mudersbach, Susanne Schüler, Thomas Griessacher, Johann G. Raith, Roland Pomberger, Daniel Vollprecht. Investigation of Possible Leaching Control Mechanisms for Chromium and Vanadium in Electric Arc Furnace (EAF) Slags Using Combined Experimental and Modeling Approaches. Minerals. 2019; 9 (9):525.
Chicago/Turabian StyleSimone Neuhold; André Van Zomeren; Joris J. Dijkstra; Hans A. Van Der Sloot; Peter Drissen; David Algermissen; Dirk Mudersbach; Susanne Schüler; Thomas Griessacher; Johann G. Raith; Roland Pomberger; Daniel Vollprecht. 2019. "Investigation of Possible Leaching Control Mechanisms for Chromium and Vanadium in Electric Arc Furnace (EAF) Slags Using Combined Experimental and Modeling Approaches." Minerals 9, no. 9: 525.
In waste management, recycled and industrial aggregates (e.g., electric arc furnace (EAF) slags) for construction applications have to fulfil the limit values with respect to the total and/or leachable contents of potentially environmentally problematic chemical elements (PEPE, e.g., Cr, Ni, Cu, Mo, V). Natural aggregates, i.e., quarried hard rocks, are neither tested nor regulated for these parameters in most EU member states, e.g., Austria, prior to using them as a construction material. The purpose of this study was to relate the mineralogy to the leachability of natural aggregates with a special emphasis on PEPE and to interpret these findings in comparison with EAF slags. Five samples of Austrian rocks were investigated by polarization microscopy, electron probe microanalyses (EPMA), X‐ray diffraction (XRD), and leaching tests as well as by hydrogeochemical modelling using LeachXSTM. Two samples showed elevated total contents of Cr, Ni, and Mo which were present as Cr‐spinel, (Fe,Mg)(Al,Cr)2O4, Ni‐olivine, (Fe,Mg,Ni)2SiO4, and molybdenite, MoS2. Whereas the former two phases also controlled the leaching of Cr and Ni, the observed leaching of Mo was higher than expected in the case of solubility control by molybdenite. In summary, the leachability of PEPE in natural and industrial aggregates was controlled by similar mineralogical mechanisms.
Daniel Vollprecht; Max Berger; Ingrid Altenburger‐Junker; Simone Neuhold; Klaus Philipp Sedlazeck; Alexia Aldrian; Joris J. Dijkstra; André Van Zomeren; Johann G. Raith; Altenburger‐ Junker; Van Zomeren. Mineralogy and Leachability of Natural Rocks–A Comparison to Electric Arc Furnace Slags. Minerals 2019, 9, 501 .
AMA StyleDaniel Vollprecht, Max Berger, Ingrid Altenburger‐Junker, Simone Neuhold, Klaus Philipp Sedlazeck, Alexia Aldrian, Joris J. Dijkstra, André Van Zomeren, Johann G. Raith, Altenburger‐ Junker, Van Zomeren. Mineralogy and Leachability of Natural Rocks–A Comparison to Electric Arc Furnace Slags. Minerals. 2019; 9 (8):501.
Chicago/Turabian StyleDaniel Vollprecht; Max Berger; Ingrid Altenburger‐Junker; Simone Neuhold; Klaus Philipp Sedlazeck; Alexia Aldrian; Joris J. Dijkstra; André Van Zomeren; Johann G. Raith; Altenburger‐ Junker; Van Zomeren. 2019. "Mineralogy and Leachability of Natural Rocks–A Comparison to Electric Arc Furnace Slags." Minerals 9, no. 8: 501.
Ammonium (NH4+) is a main constituent of landfill leachates (50–2200 mg L−1) which has to be removed prior to indirect (
Daniel Vollprecht; Sabrina Frühauf; Kristina Stocker; Markus Ellersdorfer. Ammonium Sorption from Landfill Leachates Using Natural and Modified Zeolites: Pre-Tests for a Novel Application of the Ion Exchanger Loop Stripping Process. Minerals 2019, 9, 471 .
AMA StyleDaniel Vollprecht, Sabrina Frühauf, Kristina Stocker, Markus Ellersdorfer. Ammonium Sorption from Landfill Leachates Using Natural and Modified Zeolites: Pre-Tests for a Novel Application of the Ion Exchanger Loop Stripping Process. Minerals. 2019; 9 (8):471.
Chicago/Turabian StyleDaniel Vollprecht; Sabrina Frühauf; Kristina Stocker; Markus Ellersdorfer. 2019. "Ammonium Sorption from Landfill Leachates Using Natural and Modified Zeolites: Pre-Tests for a Novel Application of the Ion Exchanger Loop Stripping Process." Minerals 9, no. 8: 471.