TY - GEN A1 - Kuhn, Ramona A1 - Jensch, Robert A1 - Fischer, Thomas A1 - Keuler, Klaus A1 - Bryant, Isaac Mbir A1 - Martienssen, Marion T1 - Sunlight Degradation of the Aminophosphonate Diethylenetriamine Penta-(Methylenephosphonic Acid) T2 - Solar N2 - Aminophosphonate diethylenetriamine penta(methylenephosphonic acid) (DTPMP) is a scale inhibitor commonly used in several industries. DTPMP is suspected to cause anthropogenic pollution through discharge into the aquatic environment. DTPMP is assumed to be degraded by sunlight radiation. We recently predicted a preliminary degradation pathway of DTPMP applyingUV treatment. Currently, we have not yet evidenced that DTPMP shows the same degradation pattern with natural sunlight. One major reason leads to the fact that the light spectrum emitted by UV lamps does not completely represent the natural sunlight spectrum, and the emitted UVB and UVA irradiation flux is much higher than for solar light. For that reason, the degradation pattern and kinetics might be different between artificial UV treatment and natural sunlight treatment. Here, we investigated whether DTPMP is degradable under natural sunlight radiation, and whether the degradation mechanisms determined through UV treatment are transferable to sunlight. We investigated five different treatment conditions, i.e., DTPMP degradation in direct or diffuse sunlight, in diffuse sunlight with addition of Ca2+ or Mg2+, and in diffuse sunlight with local TW. Our experiment was carried out from March 2021 to October 2021. We performed LC/MS analyses and measured the release of o-PO4 3  . DTPMP was degraded with all five treatment conditions. The fastest DTPMP degradation occurred in direct and diffuse sunlight without addition of bivalent cations. The addition of Ca2+ and Mg2+ resulted in inhibited degradation. Similar effects occurred for sunlight treatment with local TW. We evidenced different degradation mechanisms for DTPMP depending on the presence of alkaline earth metals as we previously proposed for UV-treated DTPMP. However, both degradation mechanisms of DTPMP belong to the same degradation pathway determined with UV treatment. Therefore, we conclude that DTPMP undergoes a similar degradation pathway in sunlight as compared to UV light. KW - Photochemistry Y1 - 2022 U6 - https://doi.org/10.3390/solar2020009 SN - 2673-9941 VL - 2 IS - 2 SP - 141 EP - 157 ER - TY - GEN A1 - Gerling, Charlotte A1 - Drechsler, Martin A1 - Keuler, Klaus A1 - Sturm, Astrid A1 - Wätzold, Frank T1 - Time to consider the timing of conservation measures: designing cost-effective agri-environment schemes under climate change T2 - MPRA paper Y1 - 2022 UR - https://mpra.ub.uni-muenchen.de/113877/ ER - TY - GEN A1 - Gerling, Charlotte A1 - Drechsler, Martin A1 - Keuler, Klaus A1 - Leins, Johannes A. A1 - Radtke, Kai A1 - Schulz, Björn A1 - Sturm, Astrid A1 - Wätzold, Frank T1 - Climate-ecological-economic modelling for the cost-effective spatiotemporal allocation of conservation measures in cultural landscapes facing climate change T2 - Q Open Y1 - 2022 U6 - https://doi.org/10.1093/qopen/qoac004 SN - 2633-9048 VL - 2 IS - 1 SP - 1 EP - 20 ER -