Person: Klöckner, Philipp
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Veröffentlichung Bausteine für einen klimagerechten Verkehr(2022) Hendzlik, Manuel; Lambrecht, Martin; Frey, Kilian; Klöckner, Philipp; Dziekan, Katrin; Dross, Miriam; Lange, Martin; Schmied, MartinVeröffentlichung Tire and road wear particles in road environment - Quantification and assessment of particle dynamics by Zn determination after density separation(2019) Reemtsma, Thorsten; Klöckner, Philipp; Eisentraut, Paul; Ruhl, Aki SebastianIn this study, a method for the determination of tire and road wear particle (TRWP) contents in particulate samples from road environment was developed. Zn was identified as the most suitable elemental marker for TRWP, due to its high concentration in tire tread and the possibility of separation from other Zn sources. The mean concentration of 21 tire samples was 8.7 +/- 2.0 mg Zn/g. Before quantification in samples from road environment, TRWP were separated from the particulate matrix by density separation. Method development was conducted using shredded tread particles (TP) as a surrogate for TRWP. Recovery of TP from spiked sediment was 95 +/- 17% in a concentration range of 2 - 200 mg TP/g. TP determination was not affected by other Zn containing solids or spiked Zn-salts. By adjusting the density of the separation solution to 1.9 g/cm3, more than 90% of total TRWP were separated from the sample matrix. TRWP concentrations in particulate matter collected in two road runoff treatment systems ranged from 0.38 to 150 mg TRWP/g. Differences in quantified TRWP contents of the two systems indicate changes in particle dynamics due to ageing and aggregation processes. The developed method allows TRWP determination in road runoff and in environments that are influenced by road traffic. The validated separation procedure can also be applied for TRWP characterization in future studies. © 2019 Elsevier Ltd. All rights reserved.Veröffentlichung Corrigendum to "Aging of tire and road wear particles in terrestrial and freshwater environments - a review on processes, testing, analysis and impact" [Chemosphere 288 (2022) 132467](2022) Wagner, Stephan; Klöckner, Philipp; Reemtsma, ThorstenVeröffentlichung Aging of tire and road wear particles in terrestrial and freshwater environments - a review on processes, testing, analysis and impact(2022) Wagner, Stephan; Klöckner, Philipp; Reemtsma, ThorstenThe environmental fate of tire and road wear particles (TRWPs) receives increasing attention due to the per capita emission volumes of 0.2-5.5 kg/(cap year) and recent reports on the environmental hazard of TRWP constituents. It is expected that aging impacts TRWPs fate in the environment but detailed knowledge is quite limited, yet. Making use of information on tire aging, the available knowledge on environmental aging processes such as thermooxidation, photooxidation, ozonolysis, shear stress, biodegradation and leaching is reviewed here. Experimental techniques to simulate aging are addressed as are analytical techniques to determine aging induced changes of TRWPs, covering physical and chemical properties. The suitability of various tire wear test materials is discussed. Findings and methods from tire aging can be partially applied to study aging of TRWPs in the environment. There is a complex interplay between aging processes in the environment that needs to be considered in future aging studies. In addition to existing basic qualitative understanding of the aging processes, quantitative understanding of TRWP aging is largely lacking. Aging in the environment needs to consider the TRWPs as well as chemicals released. Next steps for filling the gaps in knowledge on aging of TRWPs in the environment are elaborated. © 2021 The Authors