Auflistung nach Autor:in "Kaupenjohann, Martin"

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Gutachten zur Anwendung von Minderungstechniken für Ammoniak durch "Ansäuerung von Gülle" und deren Wirkungen auf Boden und Umwelt
(Umweltbundesamt, 2019) Kaupenjohann, Martin; Schnug, Ewald; Haneklaus, Silvia; Institut für Ökologie (Berlin); Julius Kühn-Institut - Bundesforschungsinstitut für Kulturpflanzen (Braunschweig); Deutschland. Umweltbundesamt; Wechsung, Gabriele
Im UNECE Ammoniakleitfaden sind alle Techniken zur Minderung der Ammoniakemissionen aus der Tierhaltung zusammengestellt und hinsichtlich ihrer Minderungspotenziale und Kosten bewertet. Dies gilt auch für die Maßnahme "Ansäuerung von Gülle". Jedoch fehlt eine umfassende Betrachtung der Umweltwirkungen dieser Maßnahme. Ziel des Gutachtens ist es daher, die Maßnahme "Ansäuerung von Gülle" wissenschaftlich-fachlich tiefgründiger als bisher zu analysieren. Der Schwerpunkt der Bewertung liegt auf der Wirksamkeit und Umweltverträglichkeit der Maßnahme. Jedoch werden auch anwendungstechnische und juristische Aspekte berücksichtigt. Die Ergebnisse sollen unmittelbar in den Prozess der Maßnahmenbewertung im Rahmen der UNECE CLRTAP einfließen. Vorab bereitgestellte Informationen wurden der UNECE TFRN bereits im Oktober 2018 vorgestellt. Darüber hinaus sollen die Ergebnisse des Vorhabens zur Umsetzung der europäischen NEC-Richtlinie in Deutschland, insbesondere in die Erarbeitung des Nationalen Programms zur Luftreinhaltung einfließen. Neue Erkenntnisse aus dem Gutachten sollen zudem den Prozess der TA-Luft-Anpassung unterstützen. Quelle: Forschungsbericht
Influence of aging and changes in physico-chemical conditions on the remobilization of Ag NP from sediments of an artificial riverbank filtration system
(2017) Degenkolb, Laura; Metreveli, George; Zehlike, Lisa; Philippe, A.; Kaupenjohann, Martin; Klitzke, Sondra
NIFLUM - Nitrogen Flux Method Evaluation - Outcomes and Recommendations of an International Expert Workshop
(2018) Döhler, Helmut; Kaupenjohann, Martin; Schmidhalter, Urs; DöhlerAgrar; Institut für Ökologie (Berlin); Technische Universität (München); Deutschland. Umweltbundesamt; Döring, Ulrike
Targeted ammonia emission reductions can only be achieved through efficient measures in the political process. At an international expert workshop, problems arising in the derivation of emission factors for NH3 and nitrogen oxides after N-fertiliser application were discussed. An overview of this issue is given in the report.Eine zielgenaue Ammoniak-Emissionsminderung kann nur durch effiziente Maßnahmen im politischen Prozess erreicht werden. Auf einem internationalen Experten-Workshop wurden Probleme diskutiert, die bei der Herleitung von Emissionsfaktoren für NH3 und Stickstoffoxide nach N-Düngemittelausbringung auftreten. Es wird ein Überblick über diese Problematik im Bericht aufgezeigt.
Remobilization of Ag NP retained in sediments of an artificial riverbank filtration system
(2017) Degenkolb, Laura; Metreveli, George; Zehlike, Lisa; Philippe, A.; Leopold, K.; Brandt, A.; Kaupenjohann, Martin; Klitzke, Sondra
Remobilization of Ag NP retained in sediments of an artificial riverbank filtration system
(2017) Degenkolb, Laura; Metreveli, George; Zehlike, Lisa; Philippe, A.; Kaupenjohann, Martin; Klitzke, Sondra
Remobilization of Ag NP retained in sediments of an artificial riverbank filtration system
(2016) Degenkolb, Laura; Metreveli, George; Zehlike, Lisa; Kumahor, Samuel; Schaumann, Gabriele E.; Baumann, Thomas; Vogel, Hans-Jörg; Kaupenjohann, Martin; Lang, Friederike; Klitzke, Sondra
Nanoparticles (NP) can enter aquatic environments via various pathways such as industrial or municipalwaste water or surface run-off from farmland. Once they enter aquatic systems they may impair the quality of the environment and drinking water reservoirs. Riverbank filtration systems can prevent contaminants from reaching such resources. The retention capacity of riverbank filtration systems and the reversibility of NP immobilization are therefore important aspects for risk assessment.
To simulate a riverbank filtration scenario, Ag NP aged in different media (soil solution, river water, Millipore water) were applied to a water-saturated column (length 1.5 m) filled with medium quartz sand.All types of particles were mainly retained in the first 10 cm of the sediment column, ranging from 50 % for soil-aged particles to approximately 100 % for particles aged in Millipore and river water. However, it is unclear under which conditions the retained Ag NP can be remobilized. Therefore, the aim of our study is to determine the remobilization of the NP and the physico-chemical factors (i.e. shear forces and hydrochemical properties) controlling this process.
In batch experiments, the sediment containing NP will be exposed to varying shear forces (i.e. ultrasonic treatment of 1.5 W/cṃand horizontal shaking of 1 h up to 7 days) in the presence of dissolved organic matter and reduced ionic strength. The total amount of remobilized silver in the supernatantwill be measured by ICP-MS following acid microwave digestion. The size and composition of mobilized homo-and heteroaggregates will be analysed by HDC-ICP-MS.
First results show that strong shear forces induced by ultrasonic treatment lead to highest remobilization of the retained Ag NP of up to 60 % for particles aged in river water. One hour of shaking remobilizes 15-20 % of the Ag NP in the sediment. Further results of the remobilization experiments will be presented.
In: Degenkolb, L; Klitzke, S Metreveli, G; Kumahor, S; Schaumann, G; Baumann, T; Vogel, HJ; Kaupenjohann, M; Lang, F (2016):Remobilization of Ag NP retained in sediments of an artificial riverbank filtration system. In: Abstract Booklet of the InternationalWorkshop "Nanoparticles in Soils and Waters: Fate, Transport and Effects", p. 32, 20 th - 21 st October, Landau in der Pfalz
The variable fate of Ag and TiO2 nanoparticles in natural soil solutions - sorption of organic matter and nanoparticle stability
(2019) Degenkolb, Laura; Kaupenjohann, Martin; Klitzke, Sondra
Engineered nanoparticles (NP) like Ag and TiO2 offer unique properties for various applications. Thus, the entry of the NP in soil environments is expected to increase in the future due to their growing industrial use. To avoid potential hazards due to these anthropogenic products, NP behavior in the environment should be well understood. In natural soil solutions, we investigated NOM adsorption onto Ag and TiO2 NP and its influence on NP colloidal stability. Therefore, we extracted soil solutions from a floodplain soil (Fluvisol) and a farmland soil (Cambisol) differing in NOM quality and inorganic ion concentration. We measured the amount of adsorbed organic carbon as well as changes in aromaticity and molecular weight of NOM upon adsorption onto NP. Additionally, the size and zeta potential of NP in both soil solutions were investigated. We observed that the highly hydrophilic NOM of floodplain soil solution rich in inorganic ions strongly adsorbed to Ag but not to TiO2 NP. Instead, sorption to TiO2 NP was observed for the more hydrophobic NOM of the farmland soil with low ionic strength which did not sorb to Ag NP. These differences had a strong effect on NP stability, leading to Ag NP destabilization in case of floodplain soil solution and TiO2 NP stabilization in the presence of farmland soil solution. Our results point out the necessity of studies in more complex systems and suppose that oxic and metallic NP might show very different fate depending on the environment they are exposed to. © Springer Nature Switzerland AG 2019