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. 2021 Feb 5;11:3227. doi: 10.1038/s41598-021-82545-1

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Experimental overview with sampling times. Shown are the two different experiments that were conducted, the long-term (LT) experiment and the short-term (ST) experiment. The bottles indicate the different treatments that were analyzed in each experiment. Beside the bottles are the sampling times in hours (h). The addition of iron is indicated with a yellow arrow. The iron-recovery (rec) and the ActD+Fe samples were the only samples that received the addition of FeCl₃ as indicated.