Filtern
Erscheinungsjahr
Dokumenttyp
- Zeitschriftenartikel (93)
- Vortrag (75)
- Beitrag zu einem Tagungsband (47)
- Beitrag zu einem Sammelband (12)
- Posterpräsentation (7)
- Buchkapitel (5)
- Forschungsbericht (4)
- Sonstiges (3)
Schlagworte
- Sewage sludge ash (31)
- Phosphorus recovery (26)
- Phosphor (21)
- Klärschlamm (19)
- Klärschlammasche (17)
- Recycling (17)
- Sewage sludge (17)
- Phosphorus (15)
- Thermochemical treatment (15)
- Phosphorrückgewinnung (11)
- Bauschuttaufbereitung (7)
- Fertilizer (7)
- Rückgewinnung (6)
- Wastewater (6)
- Gypsum (5)
- Lichtbogenofen (5)
- Abwasser (4)
- Düngemittel (4)
- Environmental evaluation (4)
- Gips (4)
- Klärschlammverordnung (4)
- P-Düngemittel (4)
- P-recovery (4)
- Phosphat (4)
- Phosphorus fertilizer (4)
- Rare earth elements (4)
- Ressource (4)
- Soil (4)
- Stahlwerksschlacke (4)
- Thermo-chemical treatment (4)
- X-ray absorption near-edge structure (XANES) spectroscopy (4)
- XANES spectroscopy (4)
- Zement (4)
- Ökobilanzielle Bewertung (4)
- Abbruch (3)
- Aluminium phosphate (3)
- Bioavailability (3)
- CDW processing (3)
- Critical raw materials (3)
- Diffusive gradients in thin films (DGT) (3)
- Electric arc furnace dust (3)
- Fertiliser (3)
- Gichtgasschlamm (3)
- Heavy metal removal (3)
- Monoverbrennung (3)
- Phosphorus recycling (3)
- Pyrometallurgie (3)
- Raman microspectroscopy (3)
- Recovery (3)
- Recycling fertiliser (3)
- Recycling fertilizer (3)
- Struvite (3)
- Tantal (3)
- Urban mining (3)
- X-ray diffraction (3)
- Zinc (3)
- Agronomische Effizienz (2)
- Altfett (2)
- Ash (2)
- Ash treatment (2)
- Ashes (2)
- Blast furnace sludge (2)
- CDW treatment (2)
- CFK (2)
- Carbonfaser (2)
- Chromium (2)
- Circular economy (2)
- Corrosion (2)
- Diffusive Gradients in thin films (DGT) (2)
- Dünger (2)
- Enzymkatalyse (2)
- Fertilzer (2)
- Filterstaub (2)
- Heavy metal evaporation (2)
- Incinerator ash (2)
- LD-Schlacke (2)
- LIBS (2)
- Leaching (2)
- Low-temperature-conversion (2)
- Mercury (2)
- Mineral phases (2)
- Monitoring (2)
- Mono-incineration (2)
- Nutrient recovery (2)
- P-Recyclingdünger (2)
- P-fractionation (2)
- P-plant-availability (2)
- Phopshorus recovery (2)
- Phoshorrückgewinnung (2)
- Pilotanlage (2)
- Plant availability (2)
- Pyrometallurgy (2)
- RC-Beton (2)
- RCA (Recycled concrete aggregates) (2)
- Recovery potential (2)
- Recycling fertilisers (2)
- Red mud (2)
- Reducing conditions (2)
- Resource recovery (2)
- Ressourcen (2)
- Rotschlamm (2)
- Scandium (2)
- Schlacke (2)
- Sekundärrohstoffe (2)
- Selective chlorination (2)
- Selective dismantling (2)
- Struvit (2)
- Sustainability (2)
- Tantalum (2)
- Wertstoffpotential (2)
- XRD (2)
- Zementersatz (2)
- Zinnschlacke (2)
- ASH DEC (1)
- Abbruchverfahren (1)
- Abwasserbehandlung (1)
- Abwasserreinigung (1)
- Adsorption (1)
- Aerodynamic levitation (1)
- Aggregetes (1)
- Agronomic performance (1)
- AlPO4 (1)
- Alit (1)
- Alite (1)
- Alkalien (1)
- Aluminum phosphate (1)
- Ammonium (1)
- Arc furnace (1)
- AshDec (1)
- BOFS (1)
- BONARES (1)
- Bauschutt (1)
- Bauxite Residue (1)
- Bauxite residue (1)
- Beta-christobalite structure type (1)
- Betonbrechsand (1)
- Betonherstellung (1)
- Bio-P-Kläranlage (1)
- Bioceramics (1)
- Biokohle (1)
- Blast-furnace sludge (1)
- Bodenfruchtbarkeit (1)
- Bottom ash (1)
- Building and Construction (1)
- Building waste (1)
- By-product (1)
- CaNaPO4 (1)
- Cadmiumtellurid (1)
- Calcium alkali phosphate (1)
- Calcium silicate (1)
- Carbide formation (1)
- Carbon feeding (1)
- Carbonfasern (1)
- CdTe-Modules (1)
- Chemical extraction (1)
- Chemical extraction methods (1)
- Chemical extraction tests (1)
- Chemical stabilization of high-temperature forms (1)
- Chemische Löslichkeit (1)
- Chicken manure ash (1)
- Chlorierung (1)
- Chlorination (1)
- Chlorine (1)
- Chrom (1)
- Chromium recovery (1)
- Chromium speciation (1)
- Coatings (1)
- Combustion and gasification (1)
- Concrete aggregates (1)
- Construction (1)
- Controlled release fertilisers (1)
- Cristobalite form (1)
- Crystalline phase identification (1)
- DGT-Methode (1)
- Deep ultraviolet (DUV) Raman microspectroscopy (1)
- Demolition/dismantling (1)
- Demolition/selective dismantling (1)
- Demonstrationsanlage (1)
- Denitrification rate (1)
- Design of experiments (1)
- Diffusive Gradients in Thin-films (DGT) (1)
- Digestion methods (1)
- Düngemittelanalytik (1)
- Düngemittelgewinnung (1)
- Dünnschichtmodul (1)
- EBPR (1)
- Elektrolichtbogenofen (1)
- Elektroofenstaub (1)
- Elemental analysis (1)
- Elimination (1)
- Entropy (1)
- Environmental LCA (1)
- Environmental pollution (1)
- Extraction (1)
- Extraktion (1)
- Extraktionen (1)
- FT-IR gas analysis (1)
- Far-infrared spectroscopy (1)
- Fertilizers (1)
- Fetiliser (1)
- Fluorescence lamps (1)
- Fluoreszenzlampen (1)
- Fly ash (1)
- Forest soils (1)
- Formation enthalpy (1)
- Fällmittel (1)
- General Materials Science (1)
- Glycogen (1)
- Greenhouse pot experiments (1)
- Gypsum plasterboards (1)
- Gypsum waste (1)
- Hazardous waste (1)
- Hazenite (1)
- Heat capacity (1)
- Heavy metal chloride (1)
- Heavy metal elimination (1)
- Heavy metal recycling (1)
- Heavy metals (1)
- Hg distribution (1)
- High-alloyed steel (1)
- High-cristobalite form (1)
- High-grade recycling (1)
- Hochwertiges Recycling (1)
- Hydration products (1)
- Hydrogen (1)
- ICP-MS (1)
- ICP-OES (1)
- In situ synchrotron x-ray diffraction (1)
- Incinerator (1)
- Incubated soil/fertilizer mixtures (1)
- Infrared (1)
- Infrared spectroscopy (1)
- Interlaboratory comparison (1)
- Internal substrate (1)
- Iron (1)
- Klimaneutralität (1)
- Kläranlage (1)
- Klärschlammaschen (1)
- Klärschlammdüngung (1)
- Kritische Rohstoffe (1)
- Landwirtschaft (1)
- Landwirtschaftliche Klärschlammverwertung (1)
- Large scale consideration (1)
- Laser-induced breakdown spectroscopy (1)
- Lead (1)
- MBR (1)
- MSWI fly ash (1)
- Makronährstoffe (1)
- Mass balance (1)
- Matrix dependencies (1)
- Meat and bone meal (1)
- Mephrec (1)
- Mercury selenide (HgSe) (1)
- Metabolism (1)
- Metal (1)
- Metal recovery (1)
- Microspectroscopy (1)
- Microwave-assisted digestion (1)
- Mid-infrared spectroscopy (1)
- Mineralische Phasen (1)
- Mono-Verbrennung (1)
- Multidisciplinary (1)
- Municipal sewage sludge (1)
- NE-Metalle (1)
- NPK fertilizer (1)
- Nano-Fourier-transform infrared spectroscopy (1)
- Nanochrystalline AlPO4 (1)
- Nasschemische Aufschluss-/Leachingverfahren (1)
- Nassmechanische Aufbereitung (1)
- Natural resources (1)
- Niobium (1)
- Nitrification inhibitor (1)
- Nonferrous metals (1)
- Nutrient (1)
- Nährstoffe (1)
- On-line analysis (1)
- Online-Analyse (1)
- Online-RFA (1)
- Oxide melts (1)
- P fertilizer (1)
- P recycling (1)
- P sink method (1)
- P solubility (1)
- P speciation (1)
- P-Recyclate (1)
- P-Rückgewinnung (1)
- P-efficiency (1)
- P-fertiliser (1)
- P-fertilizer (1)
- Permeat (1)
- Perowskit (1)
- Pflanzenverfügbarkeit (1)
- Pflanzenwurzel (1)
- Phase formation (1)
- Phase transformation (1)
- Phoshpor availability (1)
- Phosphataufbereitungsanlage (1)
- Phosphate (1)
- Phosphate dynamics (1)
- Phosphate extractability and availability (1)
- Phosphate recovery (1)
- Phosphate-bearing mineral phases (1)
- Phosphor-Recycling (1)
- Phosphor-Rückgewinnung (1)
- Phosphorous (1)
- Phosphorous recovery (1)
- Phosphorus availability (1)
- Phosphorus compounds (1)
- Phosphorus elimination (1)
- Phosphorus plant-availability (1)
- Phosphorus speciation (1)
- Phosphorus-fertiliser (1)
- Phosphous recovery (1)
- Photometric P determination (1)
- Photonenaktivierungsanalyse (1)
- Photovoltaic (PV) (1)
- Photovoltaik (1)
- Plant growth experiments (1)
- Plasma (1)
- Pollutant (1)
- Polyvinylchloride (PVC) (1)
- Portland Cement (1)
- Post-denitrification (1)
- Pot experiments (1)
- Process upscaling (1)
- Prozessoptimierung (1)
- Pyrolyse (1)
- Raman (1)
- Raman spectroscopy (1)
- Recycled gypsum (1)
- Recycled sources (1)
- Recycling fertilizers (1)
- Recyclingdüngemittel (1)
- Red Mud (1)
- Reduction (1)
- Reduction of sulphates (1)
- Reduction process (1)
- Reductive melting (1)
- Reductive smelting (1)
- Reduktionsprozess (1)
- Relative agronomische Effizienz (RAE) (1)
- Resource Recovery (1)
- Resource recovery potential (1)
- Resources (1)
- Ressourcenrückgewinnung (1)
- Ressourcenschutz (1)
- Reststoffe (1)
- Retentat (1)
- Rhenanite (1)
- Ringversuch P-Gehalt in Klärschlamm (1)
- Robustheitstests (1)
- Rostaschen (1)
- Sc recovery (1)
- Scattering-type scanning near-field optical microscopy (s-SNOM) (1)
- Secondary P-fertilizer (1)
- Sekundärrohstoff (1)
- Sekundärrohstoffdüngemittel (1)
- Selective Chlorination (1)
- Selenium (1)
- Seltene Erden (1)
- Seltenerdmetalle (1)
- Separation techniques (1)
- Sewage Sludge (1)
- Sewage Sludge Ashes (1)
- Sewage sludge ash (SSA) (1)
- Sewage sludge disposal (1)
- Sewage sludge ordinance (1)
- Sewage sludges (1)
- Silicate (1)
- Silicon carbide (1)
- Slag (1)
- Slag treatment (1)
- Sludge disposal (1)
- Sodium sulfate (1)
- Soil testing (1)
- Solar energy (1)
- Solubility in ammonium citrate (1)
- Stabilization of high-temperature phase at RT (1)
- Stacking disorder (1)
- Stalwerksschlacke (1)
- Steelmaking slag (1)
- Stofftrennung (1)
- Sugar cane bagasse (1)
- Sulfatentfachtung (1)
- Sulfur (1)
- Synchrotron infrared microspectroscopy (1)
- Synchrotron radiation (1)
- Technologiemetalle (1)
- Technology metals (1)
- Thermal analysis (1)
- Thermal treatment (1)
- Thermochemisch (1)
- Thermochemische Behandlung (1)
- Thermochemische Prozesse (1)
- Thermochemische Stofftrennung (1)
- Thermochemische Verfahren (1)
- Thermochemistry (1)
- Thermodynamic simulation (1)
- Thermodynamics (1)
- Thermogravimetry/FT-IR (1)
- Treatment of C&D wastes (1)
- Tricalcium-silicate (1)
- Tricalciumsilikat (1)
- Tridymite (1)
- Tridymite form (1)
- Ultraviolet (1)
- VOC (1)
- Vegetationsversuche (1)
- Verbrennung (1)
- Verfahrensentwicklung (1)
- Vergasung (1)
- WEEE (1)
- Wasserstoffplasma (1)
- Waste (1)
- Waste management (1)
- Waste materials (1)
- Waste water (1)
- Waste water treatment (1)
- Wertstoffrückgewinnung (1)
- Whitlockite-to-buchwaldite transformation (1)
- Wood ash (1)
- X-ray absorption near edge structure (XANES) spectroscopy (1)
- X-ray absorption near-edge structure (XANES) (1)
- X-ray absorption spectroscopy (1)
- X-ray adsorption near-edge structure (XANES) spectroscopy (1)
- X-ray diffraction (XRD) (1)
- XANES (1)
- Yttrium (1)
- Zementklinker (1)
- Zentrat (1)
- Zeolithe (1)
- Zinc chloride (1)
- Zink (1)
- microspectroscopy (1)
- soil (1)
- thermochemical substance separation (1)
- thermochemische Behandlung (1)
- x-ray diffraction (1)
- Ökobilanzielle Betrachtung (1)
Organisationseinheit der BAM
- 4 Material und Umwelt (90)
- 4.4 Thermochemische Reststoffbehandlung und Wertstoffrückgewinnung (90)
- 4.3 Schadstofftransfer und Umwelttechnologien (8)
- 7 Bauwerkssicherheit (6)
- 7.1 Baustoffe (4)
- 7.4 Baustofftechnologie (4)
- 1 Analytische Chemie; Referenzmaterialien (3)
- 1.4 Prozessanalytik (2)
- 1.7 Organische Spuren- und Lebensmittelanalytik (1)
- 4.2 Material-Mikrobiom Wechselwirkungen (1)
Paper des Monats
- ja (2)
Rotschlamm fällt in sehr großen Mengen bei der Herstellung von Aluminiumoxid an und wird fast ausschließlich deponiert. Es wird eine neue Technologie vorgestellt bei der das im Rotschlamm enthaltene Eisenoxid mittels Wasserstoffplasma reduziert wird. Es wird ein Reaktionsmechanismus über Titanomagnetit und Hercynit vorgeschlagen.
AbstractRed mud is the waste of bauxite refinement into alumina, the feedstock for aluminium production1. With about 180 million tonnes produced per year1, red mud has amassed to one of the largest environmentally hazardous waste products, with the staggering amount of 4 billion tonnes accumulated on a global scale1. Here we present how this red mud can be turned into valuable and sustainable feedstock for ironmaking using fossil-free hydrogen-plasma-based reduction, thus mitigating a part of the steel-related carbon dioxide emissions by making it available for the production of several hundred million tonnes of green steel. The process proceeds through rapid liquid-state reduction, chemical partitioning, as well as density-driven and viscosity-driven separation between metal and oxides. We show the underlying chemical reactions, pH-neutralization processes and phase transformations during this surprisingly simple and fast reduction method. The approach establishes a sustainable toxic-waste treatment from aluminium production through using red mud as feedstock to mitigate greenhouse gas emissions from steelmaking.
Im Verbundprojekt R-Rhenania wird eine industrielle Demonstrationsanlage am Standort der Monoverbrennungsanlage Altenstadt der Firma Emter errichtet und im Jahr 2024 den Betrieb aufnehmen. Die vorhandene Rostfeuerung-Monoverbrennung wird so umgebaut, dass ein neues thermochemisches Verfahren integriert werden kann, welches hochwirksame und schadstoffarme Dünger produziert (bis zu 17.000 t/a). Die thermochemischen Produkte werden in Gefäß- und Feldversuchen im ökologischen Landbau auf ihre Düngewirkung getestet. Die Umweltverträglichkeit der Demonstrationsanlage wird untersucht, wie auch die Übertragbarkeit des Verfahrens auf weitere Regionen.
Fused cement clinker can be produced from molten basic oxygen furnace slag (BOFS) by way of a reductive thermochemical treatment. During the thermochemical treatment, oxidic iron is reduced to metallic iron and separated. The resulting low-iron slag has a chemical and mineralogical composition similar to ordinary Portland cement (OPC) clinker. In this study, the hydraulic reactivity of the fused clinker from BOFS with and without gypsum was investigated using isothermal calorimetry, differential scanning calorimetry, in situ X-ray diffraction and powder X-ray diffraction. Furthermore, a synthetic fused clinker without foreign ions and fused clinker produced by a mixture of both materials was studied. The hydraulic reaction of the fused clinker from BOFS was considerably slower than that of OPC. However, the reaction can be accelerated by adding gypsum as a sulfate carrier. Furthermore, the results showed an increased reaction rate with decreasing content of foreign ions such as Fe, P or Mn.
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.
Aufgrund der natürlichen und vom Menschen verursachten Heterogenität von Böden erfordert der Erhalt und die Verbesserung ihrer Fruchtbarkeit durch landwirtschaftliche Bewirtschaftungsmaßnahmen sorgfältig geplante Ent-scheidungen, die auf einer detaillierten Erfassung der Bodeneigenschaften und einem vertieften Verständnis der Bodenprozesse beruhen. Es ist bekannt, dass die konventionelle, flächen-einheitliche Bewirtschaftung Ertragsver-luste durch zu geringe Bewirtschaftungsintensität (z. B. Düngung) auf einen Teil der Fläche verursacht, während andere Teile des Feldes zu hohe Dosen erhalten und es dadurch zu Verschwendung von Ressourcen und zu Um-weltbelastungen kommt. Trotz der Verfügbarkeit von Technologien für ortsspezifische Düngung ist die Akzeptanz ortsspezifischer Bewirtschaftung (Precision Agriculture) in der Praxis noch gering. Ein wesentlicher Grund dafür ist das Fehlen von kostengünstigen Methoden zur Erfassung der bewirtschaftungsrelevanten Bodenmerkmale. So-wohl für die elementanalytische Untersuchung von Böden als auch für die Untersuchung von Ausgangsmaterialien (z.B. Klärschlammaschen) für ihre Verwendung als Dünger ist eine zuverlässige Analytik und Prozessüberwachung erforderlich.