TY - JOUR
A1 - Vogel, Christian
A1 - Krüger, Oliver
A1 - Adam, Christian
T1 - Thermochemical treatment of sewage sludge ash with sodium additives under reducing conditions analyzed by thermogravimetry
N2 - Phosphorus (P) for fertilizer use can be recovered from sewage sludge ash (SSA). To enhance the bioavailability of P and reduce the heavy metal content of SSA, it can be treated thermochemically with Na2CO3 or Na2SO4 at 950 °C in a rotary kiln using dry sewage sludge or lignite as reducing agent. These processes were investigated by thermogravimetry/differential thermal analysis coupled with gas analysis. Reducing conditions in this experimental setup were provided by 2 % hydrogen in the Ar carrier gas. During SSA + Na2CO3 treatment CO2, CO and water were detected in the off-gas. During SSA + Na2SO4 treatment SO2, some CO2 and water were detected. Heavy metal removal was more efficient for SSA + Na2CO3 compared to the sulfate variant. A SSA + Na2SO4 + lignite variant which also formed CO shifted the heavy metal removal to the results obtained with Na2CO3 which was obviously due to the additional reduction potential. However, Zn evaporation was not achieved with the Na2SO4 variants which were most probably due to immobilization as ZnS.
KW - Phosphorus recovery
KW - Thermochemical treatment
KW - Sewage sludge ash
KW - Reducing conditions
KW - Heavy metal evaporation
KW - FT-IR gas analysis
PY - 2016
DO - https://doi.org/10.1007/s10973-015-5016-z
SN - 1388-6150
SN - 1418-2874
SN - 0368-4466
SN - 1572-8943
VL - 123
IS - 2
SP - 1045
EP - 1051
PB - Springer
CY - Dordrecht
AN - OPUS4-34556
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Smol, M.
A1 - Adam, Christian
A1 - Kugler, Stefan
T1 - Thermochemical Treatment of Sewage Sludge Ash (SSA)—Potential and Perspective in Poland
N2 - Phosphorus (P) recovery from sewage sludge ash (SSA) is one of the most promising approaches of phosphate rock substitution in mineral fertilizers and might be a sustainable way to secure supply of this raw material in the future. In the current investigation, the process of thermochemical treatment of SSA was applied to SSA coming from selected mono-incineration plants of municipal sewage sludge in Poland (Cracow, Gdansk, Gdynia, Lodz, Kielce and Szczecin).
The Polish SSA was thermochemically converted in the presence of sodium (Na) additives and a reducing agent (dried sewage sludge) to obtain secondary raw materials for the production of marketable P fertilizers. The process had a positive impact on the bioavailability of phosphorus and reduced the content of heavy metals in the obtained products. The P solubility in neutral Ammonium citrate, an indicator of its bioavailability, was significantly raised from 19.7–45.7% in the raw ashes and 76.5–100% in the thermochemically treated SSA. The content of nutrients in the recyclates was in the range of 15.7–19.2% P2O5, 10.8–14.2% CaO, 3.5–5.4% Na2O, 2.6–3.6% MgO and 0.9–1.3% K2O. The produced fertilizer raw materials meet the Polish norms for trace elements covered by the legislation: the content of lead was in the range 10.2–73.1 mg/kg, arsenic 4.8–22.7 mg/kg, Cadmium 0.9–2.8 mg/kg and mercury <0.05 mg/kg. Thus, these products could be potentially directly used for fertilizer production. This work also includes an analysis of the possibilities of using ashes for fertilizer purposes in Poland, based on the assumptions indicated in the adopted strategic and planning documents regarding waste management and fertilizer production.
KW - Sewage Sludge Ashes
KW - Critical raw materials
KW - Phosphorus
KW - Fertilizer
KW - Sewage Sludge
PY - 2020
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-514468
DO - https://doi.org/10.3390/en13205461
VL - 13
IS - 20
SP - 5461
AN - OPUS4-51446
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Noack, M.
A1 - Dittmar, A.
A1 - Stöhr, M.
A1 - Georgi, G.
A1 - Adam, Christian
A1 - Brenneis, Rudolf
A1 - Kley, Gerd
A1 - Lehmann, Annekatrin
A1 - Handte, J.
A1 - Meichle, K.
A1 - Schwake, M.
T1 - Thermische Regenerierung von Zeolithpulver Typ X aus der VOC-Luftreinigung
N2 - Für die Entfernung von VOC (volatile organic compounds) aus der Luft von Fertigungsstätten werden vielfach mikroporöse Adsorbentien eingesetzt. Die gereinigte Luft wird rezyklisiert. Für die mit VOC beladenen Adsorbentien wird ein Regenerierungsweg für den mehrfachen Gebrauch gesucht. Bei der Regenerierung sollen die VOC möglichst vollständig desorbiert werden und mit einer geringen Gasmenge in einer katalytischen Verbrennung zu CO2 und H2O umgewandelt werden. Die Wirtschaftlichkeit der Luftreinigung wird wesentlich bestimmt durch die Sorptionskapazität des Adsorbens, die erforderliche Energie für die thermische Regenerierung und die Menge des Spülgases bei der Regenerierung. In dieser Arbeit wird der Einsatz von Typ X-Zeolithpulver in der Luftreinigung einer Lackiererei beschrieben und dessen Regenerierung im Labor mittels DTA/TG und Isothermenmessung der Schlüsselkomponenten untersucht. Ferner wurde die Regenerierung des beladenen Zeoliths in einem Labor-Drehrohrofen unter Variation der Betriebsparameter untersucht und anschließend mit ausgewählten Parametern in einem kleintechnischen Drehrohrofen durchgeführt. Die Verfahrensvarianten werden diskutiert.
KW - Adsorption
KW - Verfahrensentwicklung
KW - VOC
KW - Zeolithe
PY - 2007
SN - 0009-286X
SN - 1522-2640
VL - 79
IS - 6
SP - 883
EP - 889
PB - Wiley-VCH Verl.
CY - Weinheim
AN - OPUS4-14975
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Auer, G.
A1 - Spanka, M.
A1 - Hamann, Christopher
A1 - Adam, Christian
T1 - Thermal zinc extraction from steel mill dust
N2 - Treatment and reusing of hazardous wastes have become significant issues of modern societies. Blast furnace sludge (BFS) and electric arc furnace dust (EAFD) are such typical wastes, because they usually contain high amounts of undesirable elements such as zinc (Zn) and lead (Pb).
These elements can cause operational problems in reusing of BFS and EAFD. In this study, the Ferro Duo GmbH and the Federal Institute for Materials Research and Testing have investigated a novel approach for eliminating and/or recovering Zn and Pb from both wastes. Applied was a selective chlorination and volatilization of Zn and Pb as chlorides at temperatures between 500 °C and 1100 °C. Both product obtained, Zn and Pb in the form of ZnCl2 and PbCl2 and the purified solid mineral compound are attractive materials for further use. Hydrochloric acid and iron(II) chloride were used as chlorination agents. Exceptionally high Zn and Pb removal efficiencies of >99.5 % could be achieved with both chlorination agents, whereby iron(II) chloride exhibited better performance.
KW - Blast furnace sludge
KW - Chlorination
KW - Electric arc furnace dust
KW - Lead
KW - Zinc
KW - Thermochemical treatment
PY - 2019
SN - 1613-2394
VL - 72
IS - 1
SP - 27
EP - 31
PB - GDMB Verlag GmbH
CY - Clausthal-Zellerfeld
AN - OPUS4-47288
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Steckenmesser, D.
A1 - Vogel, Christian
A1 - Herzel, Hannes
A1 - Félix, R.
A1 - Adam, Christian
A1 - Steffens, D.
T1 - Thermal treatment of sewage sludge for phosphorus fertilizer production: a model experiment
N2 - Phosphorus (P) resource availability and quality is declining and recycling P-fertilizers from waste materials are becoming increasingly important. One important secondary P resource is sewage sludge (SSL) where P is often bound as aluminum phosphate (Al-P), iron phosphate (Fe-P) and polyphosphate (poly-P), respectively. Thermal treatment in different ways is a promising way in P recycling to produce highly plant-available P-fertilizers. To investigate mechanisms behind transformation of hardly available P-species toward plant-available P forms we treated a model SSL containing different kinds of defined P sources by low-temperature conversion (LTC) at 500 °C and subsequent thermochemical treatment of the LTC product with Na additives (TCT) at 950 °C, respectively. Pot experiments with ryegrass were carried out to determine the plant availability of P of the different treatments. The poly-P (here pyrophosphates) based fertilizers had a very high plant availability after both thermal treatments. During LTC treatment the plant availability of the Fe-P and Al-P variants increased because of the Formation of Fe(II) phosphates and/or pyro-/polyphosphates. Especially the formation of Al-polyphosphate shows a high plant availability. The subsequent TCT further increased strongly the plant availability of the Fe-P variants because of the formation of highly plant-available CaNaPO4. Thus, a direct TCT without prior LTC probably also produce CaNaPO4 and is recommended for Fe-P based SSL. However, a molar Ca/P ratio of � 1 in the fertilizer is favorable for CaNaPO4 formation. Thus, the knowledge on the source of primary P in SSL is essential for choosing the accurate thermal treatment method to produce highly plant-available P-fertilizers from SSL.
KW - Phosphorus
KW - Sewage sludge
KW - X-ray diffraction
KW - X-ray absorption near-edge structure (XANES) spectroscopy
KW - Fertilizer
PY - 2021
DO - https://doi.org/10.1080/01904167.2021.1994595
SN - 0190-4167
VL - 45
IS - 8
SP - 1123
EP - 1133
PB - Taylor & Francis Online
AN - OPUS4-53755
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Adam, Christian
A1 - Kley, Gerd
A1 - Simon, Franz-Georg
T1 - Thermal treatment of municipal sewage sludge aiming at marketable P-fertilisers
N2 - Municipal sewage sludge is a carrier of nutrients most important phosphorus (P) but also contains organic pollutants and heavy metals. A two steps thermal treatment is suggested based on 1. mono-incineration of sewage sludge under destruction of organic pollutants and 2. thermochemical treatment of the resulting ashes to remove heavy metals and increase P-bioavailability. The targeted products are marketable P-fertilisers. The thermochemical treatment was investigated in a gas tight lab-scale rotary furnace. Seven sewage sludge ashes of different origin and composition and one residue from gasification of sewage sludge were mixed with a chlorine donor (e.g. MgCl2) and thermochemically treated under systematic variation of operational parameters. The distributions of the heavy metals between solid and gas phase were determined. The heavy metals concentrations of the treated ashes met the legislative limits in most cases. The products from thermochemical treatment are suited raw materials for P-fertiliser production. Relevant process parameters such as temperature, type and concentration of Cl-donor and retention time were optimised for the thermochemical treatment step.
KW - Sewage sludge
KW - Mono-incineration
KW - Ash treatment
KW - Thermochemical treatment
KW - Phosphorus-fertiliser
PY - 2007
SN - 1345-9678
SN - 1347-5320
VL - 48
IS - 12
SP - 3056
EP - 3061
PB - Japan Institute of Metals
CY - Sendai
AN - OPUS4-16647
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Vogel, Christian
A1 - Stemann, Jan
A1 - Holldack, K.
A1 - Sekine, R.
A1 - Lipiec, E.
A1 - Adam, Christian
T1 - Thermal treatment of chromium (III) oxide with carbonates analyzed by far-infrared spectroscopy
PY - 2015
SN - 0003-7028
SN - 1943-3530
VL - 69
IS - 10
SP - 1210
EP - 1214
PB - Society for Applied Spectroscopy
CY - Frederick, Md.
AN - OPUS4-34635
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Walsh, Michael
A1 - Schenk, Gerhard
A1 - Robinson, Nicole
A1 - John, Samuel
A1 - Dayananda, Buddhi
A1 - Krishnan, Vithya
A1 - Adam, Christian
A1 - Hermann, Ludwig
A1 - Schmidt, Susanne
T1 - The Circular Phosphorus Economy: Agronomic Performance of Recycled Fertilizers and Target Crops
N2 - ABSTRACTBackgroundThe circular phosphorus (P) economy addresses economic and environmental penalties inherent to the current linear P economy. Phosphorus sources recovered from waste steams (recyclates) offer an alternative to conventional fertilizers.AimThis research aimed to assess the agronomic performance of P recyclates derived from wastewater (hazenite, struvite), treated sewage sludge ash (SSA) and compost (FOGO food organics/garden organics) with crops previously characterized for P use efficiency (PUE).MethodsPhosphorus was supplied as granules and benchmarked against conventional fertilizers or mineral solution. Grown in controlled conditions, crops received recyclates individually or as amalgamates, with or without additional water‐soluble P. We quantified P uptake, yield and phytate content, and calculated agronomic performance indicators.ResultsResults revealed that (1) crop genotypes with purportedly lower or higher PUE showed similar performance when grown with limiting P supply and/or less soluble P recyclates, (2) crop performance improved when less soluble P recyclates were combined with water‐soluble P, (3) crops produced similar yield and biomass when supplied with an organo‐mineral formulation, hazenite, or conventional fertilizer, (4) grain accumulated higher levels of the antinutrient phytate with excess soluble P.ConclusionWe conclude that suitably formulated P recyclates can supplement or replace conventional fertilizers, and that fertilizer design should consider the solubility of recyclates and a crop's ability to access less soluble P. This adds to the growing body of evidence that well‐formulated next‐generation fertilizers can efficiently nourish crops. Integrating insights from controlled experiments and field trials is a cost‐effective strategy to actualize the circular P economy.
KW - Recycling fertilizer
KW - Phosphate recovery
KW - Sewage sludge ash
KW - Struvite
KW - Hazenite
PY - 2025
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-627116
DO - https://doi.org/10.1002/jpln.202400299
SP - 1
EP - 14
PB - Wiley
AN - OPUS4-62711
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Taube, Mareike Carolin
A1 - Adamczyk, Burkart
A1 - Adam, Christian
A1 - Feldmann, Ines
A1 - Ostermann, Markus
A1 - Reuter, M.
A1 - Stelter, M.
T1 - Tantalrecycling aus pyrometallurgischen Rückständen
N2 - Gegenstand dieser Arbeit ist die Untersuchung eines bestehenden pyrometallurgischen Prozesses zur Rückgewinnung von Tantal und Niob aus metallurgischen Reststoffen mit vorwiegend niedriger Wertstoffkonzentration.
Zur näheren Erforschung der im vorliegenden Stoffsystem ablaufenden Reduktionsprozesse wurden in einem Elektrolichtbogenofen Schmelzversuche im Pilotmaßstab durchgeführt. Als Reduktionsmittel diente Koks, welcher mithilfe einer Argon-gespülten Eisenlanze in die flüssige mineralische Schmelze eingebracht wurde. Während der Reduktionsbehandlung werden Refraktärmetalle wie Tantal und Niob in ihre Carbide überführt und anschließend in der erschmolzenen eisenbasierten Metallphase am Boden des Reaktors angereichert. Neben Tantal und Niob gelangt auch ein Teil des im Einsatzmaterial enthaltenen Titans als unerwünschtes Begleitelement in die Metallphase.
Sein Großteil verbleibt jedoch als Oxid in der Schlacke und wird dort hauptsächlich im Mineral Perowskit (CaTiO3) gebunden. Die erstarrten Schlackeproben wurden mit verschiedenen Methoden wie Röntgenfluoreszensanalyse, Röntgenbeugung und Rasterelektronenmikroskopie mit gekoppelter energiedispersiver Röntgenanalyse untersucht, um die Bildung tantalhaltiger Mineralphasen zu verschiedenen Stadien des Reduktionsprozesses zu verfolgen.
Die hier gewonnenen Erkenntnisse zeigen, dass weniger die durch das Einblasen von Koks verursachte Reduktionsreaktion, sondern das Absinken der tantalreichen Eisentröpfchen in der flüssigen mineralischen Schmelze, gefolgt von ihrer Anreicherung in die Metallphase, für die Kinetik ausschlaggebend ist.
N2 - An existing pyrometallurgical process for tantalum and niobium recovery, mainly from low grade pyrometallurgical residues, was investigated. Melting experiments were carried out in a pilot-scale electric arc furnace to study the material system during the reduction process caused by blowing coke into the liquid mineral melt. During the pyrometallurgical treatment refractory metals such as tantalum and niobium are converted into their carbides and enriched in the molten iron-based metal phase. Titanium is also enriched in the metal phase as an unwanted accompanying element, but most of it remains in oxidic form in the slag and is mainly bound in the mineral perovskite. Cooled down slag samples were analysed using XRF, XRD, SEM and EDX to investigate the formation of mineral phases rich in tantalum during various stages of the reduction process.
The results show that the settling of the tantalum-rich iron droplets in the molten slag into the metal phase May play a greater role for the kinetics than the actual reduction reaction caused by blowing in coke.
KW - Tantal
KW - Recycling
KW - Reduktionsprozess
KW - Perowskit
KW - Elektrolichtbogenofen
PY - 2020
SN - 1613-2394
VL - 73
IS - 4
SP - 196
EP - 205
PB - GDMB Verlag GmbH
CY - Clausthal-Zellerfeld
AN - OPUS4-51064
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Schraut, Katharina
A1 - Adamczyk, Burkart
A1 - Adam, Christian
A1 - Stephan, D.
A1 - Meng, Birgit
A1 - Simon, Sebastian
A1 - von Werder, Julia
T1 - Synthesis and characterisation of alites from reduced basic oxygen furnace slags
N2 - Basic oxygen furnace slags (BOFS) are by-products of the steelmaking process. Several researchers have studied the production of Portland cement clinker and metallic iron from BOFS via a reductive treatment.
In this study, we applied a carbothermal reduction of BOFS in a technical-scale electric arc furnace and characterised the clinker-like products. Those clinker-like non-metallic products (NMPs) had a chemical and mineralogical composition comparable to clinker for ordinary Portland cement (OPC) and contained large elongated alite crystals as major component. The pure NMPs reacted more slowly and achieved a lower degree of hydration compared with commercial OPC.
If the reactivity of the products can be further increased by employing specific adaptations, it can be used as a full clinker substitute for OPC. Nevertheless, it is also an option to use the material without further modifications as a cement component or concrete addition, which contributes to the strength development in both cases.
KW - BOFS
KW - Hydration products
KW - Thermal analysis
KW - X-ray diffraction
PY - 2021
DO - https://doi.org/10.1016/j.cemconres.2021.106518
SN - 0008-8846
VL - 147
SP - 6518
PB - Elsevier Ltd.
AN - OPUS4-52939
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Ante, A.
A1 - Trumpler, A.
A1 - Niermann, S.
A1 - Decker, Renate
A1 - Hermann, L.
A1 - Adam, Christian
T1 - SUSAN - Sustainable and safe re-use of municipal sewage sludge for nutrient recovery
KW - Sewage sludge
KW - Phosphorus
KW - Recycling
KW - Thermochemical treatment
KW - Heavy metal removal
KW - Large scale consideration
PY - 2010
SN - 0016-3651
VL - 151
IS - 13
SP - 78
EP - 84
PB - Oldenbourg-Industrieverl.
CY - München
AN - OPUS4-22097
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Dombinov, V.
A1 - Herzel, Hannes
A1 - Meiller, M.
A1 - Müller, F.
A1 - Willbold, S.
A1 - Zang, J. W.
A1 - da Fonseca-Zang, W. A.
A1 - Adam, Christian
A1 - Klose, H.
A1 - Poorter, H.
A1 - Jablonowski, N. D.
A1 - Schrey, S. D.
T1 - Sugarcane bagasse ash as fertilizer for soybeans: Effects of added residues on ash composition, mineralogy, phosphorus extractability and plant availability
N2 - Sugarcane bagasse is commonly combusted to generate energy. Unfortunately, recycling strategies rarely consider the resulting ash as a potential fertilizer. To evaluate this recycling strategy for a sustainable circular economy, we characterized bagasse ash as a fertilizer and measured the effects of co-gasification and co-combustion of bagasse with either chicken manure or sewage sludge: on the phosphorus (P) mass fraction, P-extractability, and mineral P phases. Furthermore, we investigated the ashes as fertilizer for soybeans under greenhouse conditions. All methods in combination are reliable indicators helping to assess and predict P availability from ashes to soybeans. The fertilizer efficiency of pure bagasse ash increased with the ash amount supplied to the substrate. Nevertheless, it was not as effective as fertilization with triple-superphosphate and K2SO4, which we attributed to lower P availability. Co-gasification and co-combustion increased the P mass fraction in all bagasse-based ashes, but its extractability and availability to soybeans increased only when co-processed with chicken manure, because it enabled the formation of readily available Ca-alkali phosphates. Therefore, we recommend co-combusting biomass with alkali-rich residues to increase the availability of P from the ash to plants.
KW - Combustion and gasification
KW - Phosphate extractability and availability
KW - X-ray diffraction (XRD)
PY - 2022
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-567632
DO - https://doi.org/10.3389/fpls.2022.1041924
SN - 1664-462X
VL - 13
SP - 1
EP - 13
PB - Frontiers Media
CY - Lausanne
AN - OPUS4-56763
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Vogel, Christian
A1 - Kohl, Anka
A1 - Adam, Christian
T1 - Spectroscopic investigation in the mid- and far-infrared regions of phosphorus fertilizers derived from thermochemically treated sewage sludge ash
N2 - Inorganic phosphorus and nitrogen-phosphorus-potassium (NPK) fertilizers based on phosphates from thermochemically treated sewage sludge ash were analyzed using mid-infrared (mid-IR) and far-infrared (FIR) spectroscopy. The different compounds present in the fertilizers were qualitatively determined with the help of recorded reference spectra of pure substances. Differentiation between various phosphates and other compounds such as sulfates, nitrates, and oxides was possible using combined interpretation of the mid-IR and FIR spectra. The results are in agreement with previous X-ray diffraction (XRD) measurements of the same samples. The main phosphate phases detected were NH4H2PO4, MgHPO4·3H2O, Mg3(PO4)2, Ca5(PO4)5Cl, CaHPO4·2H2O, Ca(H2-PO4)2·H2O, and AlPO4. Furthermore, K2SO4, NH4NO3, Fe2O3, and SiO2 were identified in the IR spectra. However, ammonium and sulfate compounds were only identified in the mid-IR region but were not detectable in the FIR region.
KW - Sewage sludge ash
KW - Fertilizer
KW - P-fertilizer
KW - Phosphorus compounds
KW - Mid-infrared spectroscopy
KW - Far-infrared spectroscopy
PY - 2011
DO - https://doi.org/10.1366/10-06168
SN - 0003-7028
SN - 1943-3530
VL - 65
IS - 3
SP - 265
EP - 271
PB - Society for Applied Spectroscopy
CY - Frederick, Md.
AN - OPUS4-23270
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Herzel, Hannes
A1 - Dombinov, V.
A1 - Vogel, Christian
A1 - Willbold, S.
A1 - Levandowski, G. V.
A1 - Meiller, M.
A1 - Müller, F.
A1 - Zang, J. W.
A1 - da Fonseca-Zang, W. A.
A1 - Jablonowski, N. D.
A1 - Schrey, S. D.
A1 - Adam, Christian
T1 - Soybean Fertilized by P-Phases from Bagasse-Based Materials: P-Extraction Procedures, Diffusive Gradients in Thin Films (DGT), and X-ray Diffraction Analysis (XRD)
N2 - The Brazilian sugarcane industry produced around 173 million tons (Mt) of bagasse in 2018. Bagasse is a by-product of juice extraction for ethanol and sugar production and is combusted in order to generate power, producing up to 10 Mt of ash per year. This ash contains various concentrations of plant nutrients, which allow the ash to be used as a crop fertilizer. However, the concentration and extractability of phosphorus (P), an essential plant nutrient, are low in bagasse ash. To increase the P content, we co-gasified and co-combusted bagasse with P-rich chicken manure. The resulting ash was thermochemically post-treated with alkali additives (Na2SO4 and K2SO4) to increase the availability of P to plants. We aimed to: (i) investigate the effect of thermochemical post-treatment of co-gasification residue and co-combustion ash on P availability to soybeans, (ii) explore the potential of chemical extraction methods (citric acid, neutral ammonium citrate, formic acid, and Mehlich-I) and diffusive gradients in thin films (DGT) to predict the availability of P to soybeans, and (iii) identify the responsible P-phases using X-ray diffraction . We evaluated P availability to soybeans growing in Brazilian Oxisol soil in two independent greenhouse pot experiments. The positive effect of thermochemical treatment on P availability from gasification residue was confirmed through the observation of increased P uptake and biomass in soybean plants. These findings were confirmed by chemical extraction methods and DGT. The gasification residue contained whitlockite as its main P-bearing phase. Thermochemical post-treatment converted whitlockite into highly soluble CaNaPO4. In contrast, co-combustion ash already contained highly soluble Ca(Na,K)PO4 as its main P-bearing phase, making thermochemical post-treatment unnecessary for increasing P availability. In conclusion, increased extractability and availability of P for soybeans were closely connected to the formation of calcium alkali phosphate. Our findings indicate that this combined methodology allows for the prediction of P-fertilization effects of ash.
KW - Sugar cane bagasse
KW - Chicken manure ash
KW - Thermochemical treatment
KW - Nutrient
KW - Plant availability
PY - 2020
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-509735
DO - https://doi.org/10.3390/agronomy10060895
VL - 10
SP - 895
EP - 6
PB - MDPI
AN - OPUS4-50973
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Ghiringhelli, Luca M.
A1 - Baldauf, Carsten
A1 - Bereau, Tristan
A1 - Brockhauser, Sandor
A1 - Carbogno, Christian
A1 - Chamanara, Javad
A1 - Cozzini, Stefano
A1 - Curtarolo, Stefano
A1 - Draxl, Claudia
A1 - Dwaraknath, Shyam
A1 - Fekete, Ádám
A1 - Kermode, James
A1 - Koch, Christoph T.
A1 - Kühbach, Markus
A1 - Ladines, Alvin Noe
A1 - Lambrix, Patrick
A1 - Himmer, Maja-Olivia
A1 - Levchenko, Sergey V.
A1 - Oliveira, Micael
A1 - Michalchuk, Adam
A1 - Miller, Ronald E.
A1 - Onat, Berk
A1 - Pavone, Pasquale
A1 - Pizzi, Giovanni
A1 - Regler, Benjamin
A1 - Rignanese, Gian-Marco
A1 - Schaarschmidt, Jörg
A1 - Scheidgen, Markus
A1 - Schneidewind, Astrid
A1 - Sheveleva, Tatyana
A1 - Su, Chuanxun
A1 - Usvyat, Denis
A1 - Valsson, Omar
A1 - Wöll, Christof
A1 - Scheffler, Matthias
T1 - Shared metadata for data-centric materials science
N2 - The expansive production of data in materials science, their widespread sharing and repurposing requires educated support and stewardship. In order to ensure that this need helps rather than hinders scientific work, the implementation of the FAIR-data principles (Findable, Accessible, Interoperable, and Reusable) must not be too narrow. Besides, the wider materials-science community ought to agree on the strategies to tackle the challenges that are specific to its data, both from computations and experiments. In this paper, we present the result of the discussions held at the workshop on “Shared Metadata and Data Formats for Big-Data Driven Materials Science”. We start from an operative definition of metadata, and the features that a FAIR-compliant metadata schema should have. We will mainly focus on computational materials-science data and propose a constructive approach for the FAIRification of the (meta)data related to ground-state and excited-states calculations, potential-energy sampling, and generalized workflows. Finally, challenges with the FAIRification of experimental (meta)data and materials-science ontologies are presented together with an outlook of how to meet them.
KW - Library and Information Sciences
KW - Statistics, Probability and Uncertainty
KW - Computer Science Applications
KW - Education
KW - Information Systems
KW - Statistics and Probability
PY - 2023
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-584846
DO - https://doi.org/10.1038/s41597-023-02501-8
VL - 10
IS - 1
SP - 1
EP - 18
PB - Springer Science and Business Media LLC
AN - OPUS4-58484
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Herzel, Hannes
A1 - Krüger, Oliver
A1 - Hermann, L.
A1 - Adam, Christian
T1 - Sewage sludge ash - A promising secondary phosphorus source for fertilizer production
N2 - Sewage sludge incineration is extensively practiced in some European countries such as the Netherlands, Switzerland, Austria and Germany. A survey of German sewage sludge ash showed that the recovery potential is high, approx. 19,000 t of phosphorus per year. However, the survey also discovered that the bioavailability of phosphorus in the sewage sludge ash is poor and that more than half of the ashes cannot be used as fertilizers due to high heavy metal content. A new thermochemical process for sewage sludge ash treatment was developed that transforms the ash into marketable fertilizer products. Sewage sludge ash was thermochemically treated with sodium and potassium additives under reducing conditions, whereby the phosphate-bearing mineral phases were transformed into plant available phosphates. High P-bioavailability was achieved with a molar Na/P ratio > 1.75 in the starting materials. Sodium sulfate, carbonate and hydroxide performed comparably as additives for this calcination process. Potassium carbonate and -hydroxide have to be added in a molar K/P ratio > 2.5 to achieve comparable P-solubility. The findings of the laboratory scale investigations were confirmed by an industrial demonstration trial for an ash treatment with sodium sulfate. Simultaneously, the volatile transition metal arsenic (61% removal) as well as volatile heavy metals such as cadmium (80%), mercury (68%), lead (39%) and zinc (9%) were removed via the off-gas treatment system. The product of the demonstration trial is characterized by high bioavailability and a toxic trace element mass fraction below the limit values of the German fertilizer ordinance, thus fulfilling the quality parameters for a P-fertilizer.
KW - Sewage sludge ash
KW - Phosphorus recovery
KW - Thermochemical treatment
KW - Reducing conditions
KW - Heavy metal evaporation
KW - Bioavailability
KW - Sodium sulfate
PY - 2016
DO - https://doi.org/10.1016/j.scitotenv.2015.08.059
SN - 0048-9697
SN - 1879-1026
IS - 542
SP - 1136
EP - 1143
PB - Elsevier
CY - Amsterdam
AN - OPUS4-34165
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Hamann, Christopher
A1 - Piehl, Patrick
A1 - Weingart, Eric
A1 - Stolle, Dirk
A1 - Al-Sabbagh, Dominik
A1 - Ostermann, Markus
A1 - Auer, Gerhard
A1 - Adam, Christian
T1 - Selective removal of zinc and lead from electric arc furnace dust by chlorination–evaporation reactions
N2 - Re-melting of scrap in an electric arc furnace (EAF) results in the accumulation of filter dust from off-gas treatment that predominantly consists of iron and zinc oxides. Filter dust is classified as hazardous waste due to its high contents of potentially toxic or ecotoxic elements such as Pb, Cr, Cd, and As. A promising processing route for this waste is selective chlorination, in which the non-ferrous metal oxides are chlorinated and selectively evaporated in form of their respective chlorides from the remaining solids via the process gas flow. Here, we investigate stepwise thermochemical treatment of EAF dust with either waste iron(II) chloride solution or hydrochloric acid at 650, 800, and 1100 ◦C. The Zn and Pb contents of the thermochemically processed EAF dust could be lowered from 29.9% and 1.63% to 0.09% and 0.004%, respectively. Stepwise heating allowed high separation between zinc chloride at the 650 ◦C step and sodium-, potassium-, and lead-containing chlorides at higher temperatures. Furthermore, the lab-scale results were transferred to the use of an experimental rotary kiln highlighting the possibilities of upscaling the presented process. Selective chlorination of EAF dust with liquid chlorine donors is, therefore, suggested as a potential recycling method for Zn-enriched steelworks dusts.
KW - Electric arc furnace dust
KW - Zinc
KW - Selective Chlorination
KW - Hazardous waste
KW - Resource Recovery
PY - 2024
DO - https://doi.org/10.1016/j.jhazmat.2023.133421
SN - 0304-3894
VL - 465
SP - 1
EP - 13
PB - Elsevier
AN - OPUS4-59345
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Kratz, S.
A1 - Beerbaum, B.
A1 - Elsner, H.
A1 - Reuvers, J.
A1 - Dockhorn, T.
A1 - Rechberger, H.
A1 - Werner, W.
A1 - Knudsen, L.
A1 - Flachowsky, G.
A1 - Rodehutscord, M.
A1 - Adam, Christian
A1 - Steingrobe, B.
A1 - Schick, J.
A1 - Albert, E.
A1 - Leinweber, P.
A1 - Ekardt, F.
A1 - Embert, G.
T1 - Ressourcen schonender Einsatz von Phosphor in der Landwirtschaft - Symposium des Institutes für Pflanzenbau und Bodenkunde des JKI in Braunschweig - eine Synopse
KW - Klärschlamm
KW - Phosphor
KW - Ressource
KW - Klärschlammasche
KW - P-Düngemittel
KW - Demonstrationsanlage
PY - 2009
SN - 1867-0911
SN - 1867-0938
SN - 1865-4371
VL - 61
IS - 2
SP - 69
EP - 71
PB - Ulmer
CY - Stuttgart
AN - OPUS4-18928
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Simon, Franz-Georg
A1 - Adam, Christian
T1 - Ressourcen aus Abfall
T1 - Resources from waste
N2 - Die Beseitigung unbehandelter Abfälle auf Deponien gehört der Vergangenheit an, nicht nur weil Verordnungen diese Praxis verbieten, sondern auch, weil wegen steigender Preise für Rohstoffe und sinkender Gehalte in Erzen auch in Abfällen nach Alternativen gesucht wird. In den Aschen aus Hausmüllverbrennungsanlagen können mit einfachen Verfahren Metalle zurückgewonnen werden. Mit dem Phosphor aus Klärschlammaschen können Düngemittel hergestellt und so natürliche Ressourcen geschont werden. In beiden Fällen ist die Anreicherung der Wertstoffe durch den Verbrennungsprozess vorteilhaft, da die Effizienz von Recyclingprozessen stark von der Konzentration im Ausgangsgut abhängig ist.
N2 - Disposal of untreated waste has come to end due to new legislation in this field. Furthermore as a response to increasing prices for primary raw materials and decreasing ore concentrations products from waste treatment display a source for secondary raw materials. Elemental metals can be easily separated from municipal solid waste incineration bottom ash. Fertilizers can be produced using phosphate from sewage sludge ashes thus preserving natural resources. In both cases the enrichment taking place in the incineration process facilitates the resource recovery, because the efficiency of recycling processes is dependent on the concentration of the input material.
KW - Klärschlammaschen
KW - NE-Metalle
KW - Phosphor
KW - Rostaschen
KW - Bottom ash
KW - Nonferrous metals
KW - Phosphorus
KW - Sewage sludge ash
PY - 2012
DO - https://doi.org/10.1002/cite.201100189
SN - 0009-286X
SN - 1522-2640
VL - 84
IS - 7
SP - 999
EP - 1004
PB - Wiley-VCH
CY - Weinheim
AN - OPUS4-26209
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Taube, Mareike Carolin
A1 - Adam, Christian
A1 - Adamczyk, Burkart
A1 - Beckmann, T.
A1 - Reuter, M.
A1 - Stelter, M.
ED - Reiser, B.
T1 - Recycling von metallurgischen Rückständen - Schmelzversuche zeigen, wie die Tantalrückgewinnung aus Zinnschlacken und weiteren Reststoffen optimiert werden kann
N2 - Since the recycling of tantalum bearing post-consumer waste is practically not existent, metallurgical residues are the most important feed for the tantalum recycling. Most tin ores naturally contain significant quantities of refractory metals. During the smelting process in primary tin production these elements are enriched in the slag phase. This slag is a highly valuable raw material for tantalum production due to its considerable concentration of tantalum and its functioning as an additional slag former in further pyrometallurgical treatment. In this paper the first process stage of an existing pyrometallurgical process for tantalum recovery, mainly from low grade pyrometallurgical residues, is discussed. Smelting trials were carried out in a pilot-scale electric arc furnace to analyse the effect of feeding on the activity of carbon as a reducing agent. Therefore, blowing petroleum coke through an iron lance and the manual adding of coke into the melting bath were tested. During the pyrometallurgical treatment elements with a high affinity to carbon were reduced to their carbide form and enriched in the molten iron-based metal phase. The objective of the process was to reduce the oxidic tantalum completely and to enrich it into the metal phase. Furthermore, the transfer of unwanted elements such as titanium into the metal phase was aimed to be avoided. Spoon test specimens were taken from the liquid mineral melt to follow the evolution of the reduction process. The cooled down solidified melting bath was investigated by using the XRD and EDX method to characterise the slag system and to identify relevant mineral phases.
N2 - Da das Recycling von tantalhaltigen Post-Consumer-Abfällen praktisch nicht existiert, stellen metallurgische Reststoffe eine äußerst wichtige Rohstoffquelle für das Tantalrecycling dar. Die meisten Zinnerze enthalten von Natur aus erhebliche Mengen an Refraktärmetallen. Diese Elemente werden in den Schlacken der pyrometallurgischen Primärzinngewinnung angereichert. Aufgrund ihrer vergleichsweise hohen Wertstoffkonzentration und ihrer Funktion als zusätzlicher Schlackenbildner stellen diese Schlacken einen wertvollen Rohstoff für die Verhüttung tantalhaltiger Reststoffe dar. In der vorliegenden Arbeit wird ein existierendes Verfahren zur Tantalrückgewinnung diskutiert, dem hauptsächlich pyrometallurgische Rückstände geringer Wertstoffkonzentration als Einsatzstoff dienen. Mit Hilfe des Verfahrens sollte dasoxidisch vorliegende Tantal vollständig reduziert und in der Metallphase angereichert werden. Weiterhin sollte vermieden werden, dass unerwünschte Elemente wie Titan in die Metallphase überführt werden. Ziel der Untersuchung war es, die ablaufenden Reduktionsprozesse besser zu verstehen, um so Ansätze für die Prozessoptimierung identifizieren zu können.
KW - Lichtbogenofen
KW - Pyrometallurgie
KW - Recycling
KW - Tantal
KW - Zinnschlacke
PY - 2020
SN - 0934-3482
VL - 33
SP - 10
EP - 17
PB - Rhombos-Verlag
CY - Berlin
AN - OPUS4-50656
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -