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Neumann, Michael

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Neumann
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Now showing 1 - 10 of 11
  • Publication
    Persistent, mobile and toxic substances in the environment: a spotlight on current research and regulatory activities
    (2020) Rüdel, Heinz; Körner, Wolfgang; Letzel, Thomas; Neumann, Michael
    Certain persistent and polar substances may pose a hazard to drinking water resources. To foster the knowledge exchange in this field the Working Group Environmental Monitoring of the German Chemical Society (GDCh) Division Environmental Chemistry and Ecotoxicology discussed at their meeting in December 2018 the significance and relevance of persistent, mobile and toxic chemicals (PMT substances) in the environment. Five oral contributions highlighted not only various aspects such as the identification of potential PMT substances based on certain properties and their possible regulation under the European REACH regulation, but also current developments in the analysis of PMT substances and results from environmental monitoring. The data presented prove that many persistent and mobile substances can be detected in surface waters. Once detected, it can be complex and costly to identify sources and reduce inputs, as a case study on 1,4-dioxane in Bavarian surface waters shows. The same applies to the removal of polar substances from raw water for drinking water production. Today, scientific advances in analytical methods make it easier to identify and quantify even very polar substances in water samples. In addition to the targeted analysis of critical chemicals, non-target screening is playing an increasingly important role. This opens up the possibility of detecting substances in water samples that have not previously been investigated in routine monitoring and testing their relevance for humans and the environment. However, the list of potentially occurring PM substances that have not yet been investigated is still very long. Further methodological improvements seem necessary here. In view of the evidence for the presence of PMT substances in the environment (e.g., trifluoroacetic acid and 1,4-dioxane) and the potential risks for drinking water abstraction, it seems important under consideration of the precautionary principle to identify and prioritise relevant REACH-registered substances. The assessment should be based on the intrinsic properties and the emission potential of the compounds. The implementation of a detailed proposal made at European level to regulate PMT and very persistent and very mobile (vPvM) substances in the context of REACH would ensure that chemicals identified as being substances of very high concern according to the PMT and vPvM criteria are subject to authorisation in future. © The Author(s) 2020
  • Publication
    Assessment of persistence, mobility and toxicity (PMT) of 167 REACH registered substances
    (2018) Berger, Urs; Ost, Norbert; Neumann, Michael; Sättler, Daniel; Schliebner, Ivo; Helmholtz-Zentrum für Umweltforschung; Deutschland. Umweltbundesamt
    For the first time a comprehensive list of 167 ⁠REACH⁠ registered substances were assessed with respect to their intrinsic substance properties persistence in the aquatic environment, mobility in the aquatic environment and toxicity. The results of this project will support the ongoing discussion to define PMT criteria under REACH. The present study provides a consolidated list of (in order of priority) assessed PaqMT substances (9 substances), assessed PaqM substances with suspected T (20 substances) and further 93 suspected PaqMT substances. A total of 134 substances are recommended to the German Environment Agency (⁠UBA⁠) for further investigation and scientific and regulatory scrutiny.
  • Publication
    The NORMAN Suspect List Exchange (NORMAN-SLE): facilitating European and worldwide collaboration on suspect screening in high resolution mass spectrometry
    (2022) Taha, Hiba Mohammed; Aalizadeh, Reza; Alygizakis, Nikiforos A.; Koschorreck, Jan; Meier, Christiane; Neumann, Michael; Schliebner, Ivo; von der Ohe, Peter C.
    Background The NORMAN Association (https://www.norman-network.com/) initiated the NORMAN Suspect List Exchange (NORMAN-SLE; https://www.norman-network.com/nds/SLE/) in 2015, following the NORMAN collaborative trial on non-target screening of environmental water samples by mass spectrometry. Since then, this exchange of information on chemicals that are expected to occur in the environment, along with the accompanying expert knowledge and references, has become a valuable knowledge base for "suspect screening" lists. The NORMAN-SLE now serves as a FAIR (Findable, Accessible, Interoperable, Reusable) chemical information resource worldwide. Results The NORMAN-SLE contains 99 separate suspect list collections (as of May 2022) from over 70 contributors around the world, totalling over 100,000 unique substances. The substance classes include per- and polyfluoroalkyl substances (PFAS), pharmaceuticals, pesticides, natural toxins, high production volume substances covered under the European REACH regulation (EC: 1272/2008), priority contaminants of emerging concern (CECs) and regulatory lists from NORMAN partners. Several lists focus on transformation products (TPs) and complex features detected in the environment with various levels of provenance and structural information. Each list is available for separate download. The merged, curated collection is also available as the NORMAN Substance Database (NORMAN SusDat). Both the NORMAN-SLE and NORMAN SusDat are integrated within the NORMAN Database System (NDS). The individual NORMAN-SLE lists receive digital object identifiers (DOIs) and traceable versioning via a Zenodo community (https://zenodo.org/communities/norman-sle), with a total of > 40,000 unique views, > 50,000 unique downloads and 40 citations (May 2022). NORMAN-SLE content is progressively integrated into large open chemical databases such as PubChem (https://pubchem.ncbi.nlm.nih.gov/) and the US EPA's CompTox Chemicals Dashboard (https://comptox.epa.gov/dashboard/), enabling further access to these lists, along with the additional functionality and calculated properties these resources offer. PubChem has also integrated significant annotation content from the NORMAN-SLE, including a classification browser (https://pubchem.ncbi.nlm.nih.gov/classification/#hid=101). Conclusions The NORMAN-SLE offers a specialized service for hosting suspect screening lists of relevance for the environmental community in an open, FAIR manner that allows integration with other major chemical resources. These efforts foster the exchange of information between scientists and regulators, supporting the paradigm shift to the "one substance, one assessment" approach. New submissions are welcome via the contacts provided on the NORMAN-SLE website (https://www.norman-network.com/nds/SLE/). © The Authors 2022
  • Publication
    PMT/vPvM assessment of REACH registered Substances Detected in Wastewater Treatment Plant Effluent, Freshwater Resources and Drinking Water
    (Umweltundesamt, 2023) Arp, Hans Peter; Hale, Sarah E.; Neumann, Michael; Norges Geotekniske Institutt (Oslo); Schliebner, Ivo
    Es wurde eine Literaturrecherche durchgeführt, um eine Liste der Stoffe zu erstellen, die bereits in Kläranlagenablauf (WTPE, 442 Stoffe), Oberflächengewässer (SW, 1021 Stoffe), Uferfiltrat (BF, 114 Stoffe), Grundwasser (GW, 338 Stoffe), Rohwasser (RW, 212 Stoffe) und Trinkwasser (DW, 385 Stoffe) detektiert wurden. 639 Stoffe wurden in mindestens einem der vier trinkwasserrelevanten Medien (BF, GW, RW und DW) detektiert, von denen waren 311 (49 %) REACH-registrierte Stoffe (Stand September 2019). Insgesamt wurden 1289 Stoffe in mindestens einem der sechs betrachteten Wassermedien (WTPE, SW, BF, GW, RW und DW) detektiert, von denen 509 (39 %) REACH-registrierte Stoffe waren. Für jeden dieser 509 Stoffe wurde eine PMT/vPvM-Bewertung durchgeführt. Die PMT/vPvM-Kriterien erfüllten 22 % (110 von 509) aller detektierten Stoffe und sogar 30 % (92 von 311) der in trinkwasserrelevanten Medien detektierten Stoffen; weitere 5 % (23 von 509) Substanzen erfüllten die Kriterien für Persistenz und Mobilität, sind aber derzeit ohne abschließende Bewertung, ob das Toxizitätskriterium erfüllt ist. 27 % (136 von 509) der detektierten REACH-registrierten Stoffe sind ohne eindeutige Bewertung, ob die PMT/vPvM-Kriterien erfüllt waren; für weitere 20 % (103 von 509) fehlen Daten, um eine PMT/vPvM-Bewertung durchzuführen. Als Nicht- PMT/vPvM-Stoffe wurden nur 26 % (137 von 509) der detektierten REACH-registrierten Stoffe bewertet. Aus dieser Literaturrecherche können drei wichtige Schlussfolgerungen gezogen werden. Die erste ist, dass REACH-registrierte Stoffe in trinkwasserrelevanten Medien häufig (49 % aller nachgewiesenen Stoffe) und oft über 0,1 Ìg/L (58 % der REACH-registrierten Stoffe) detektiert werden. Die zweite ist, dass trotz Datenlücken die PMT/vPvM-Bewertung zeigt, dass sehr viele in Trinkwassermedien detektierten REACH-registrierten Stoffe die PMT/vPvM-Kriterien erfüllen, so z. B. in RW (39 % oder 49 von 125 Stoffen), GW (38 % oder 63 von 165 Stoffen) und DW (37 % oder 69 von 186 Stoffen). Die dritte ist, dass der log KOC-Grenzwert von 4,0 für das Mobilitätskriterium zwischen 95 und 100 % der in den vier trinkwasserrelevanten Medien detektierten P/vP-Stoffe erfasst. Dies zeigt die Eignung des auf dem log KOC basierenden Mobilitätskriterium. Registranten, Wasserbehörden und Regulierungsbehörden werden dazu angehalten, für die in trinkwasserrelevanten Medien detektierten 110 REACH-registrierten PMT/vPvM-Stoffe unverzüglich Maßnahmen zu ergreifen um künftige Emissionen in die aquatische Umwelt zu minimieren. Quelle: Forschungsbericht
  • Publication
    Protecting the sources of our drinking water
    (Umweltbundesamt, 2019) Neumann, Michael; Schliebner, Ivo; Deutschland. Umweltbundesamt
    Chemicals with a specific combination of intrinsic substance properties pose a hazard to the sources of our drinking water, including substances that are very persistent (vP) in the environment and very mobile (vM) in the aquatic environment as well as substances that are persistent (P), mobile (M), and toxic (T). This publication presents the result of the scientific and technical development of the PMT/vPvM criteria under EU REACHRegulation (EC) No 1907/2006. The scientific and regulatory considerations include (1) monitoring data, (2) simulation and model studies and (3) impact considerations. This can be considered a ready-to-use tool for industry to identify PMT/vPvM substances. Quelle: http://www.umweltbundesamt.de/
  • Publication
    Protecting the sources of our drinking water
    (2017) Neumann, Michael; Schliebner, Ivo; Deutschland. Umweltbundesamt
    Protecting the sources of our drinking water from any threats caused by chemicals is of the utmost importance. A strategy is needed in order to allow Europe̷s chemical industry to continue to innovate while ensuring the protection of the water cycle. The German Environment Agency (UBA) is carrying out an initiative to identify those substances that are persistent (P) in the environment, mobile (M) in the water cycle (PM substances), and additionally toxicity (T) to human health (PMT substances). The proposed criteria will assist registrants in fulfilling their responsibility of guaranteeing the safe use of chemicals under the EU̷s chemical regulation ̮REACHŁ (Regulation EC No 1907/2006). Quelle: https://www.umweltbundesamt.de/
  • Publication
    Collaborative decision support and documentation in chemical safety with KnowSEC
    (2016) Baumeister, Joachim; Striffler, Albrecht; Brandt, Marc; Neumann, Michael
    To protect the health of human and environment, the European Union implemented the REACH regulation for chemical substances. REACH is an acronym for Registration, Evaluation, Authorization, and Restriction of Chemicals. Under REACH, the authorities have the task of assessing chemical substances, especially those that might pose a risk to human health or environment. The work under REACH is scientifically, technically and procedurally a complex and knowledge-intensive task that is jointly performed by the European Chemicals Agency and member state authorities in Europe. The assessment of substances under REACH conducted in the German Environment Agency is supported by the knowledge-based system KnowSEC, which is used for the screening, documentation, and decision support when working on chemical substances. The software KnowSEC integrates advanced semantic technologies and strong problem solving methods. It allows for the collaborative work on substances in the context of the European REACH regulation. We discuss the applied methods and process models and we report on experiences with the implementation and use of the system.Quelle: http://jcheminf.springeropen.com