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Thus, a microcosm test with multispecies (<jats:italic>Brassica oleracea<\/jats:italic> and <jats:italic>Eisenia fetida<\/jats:italic>) was carried out using an agricultural soil contaminated with two different leather residues (Wet Blue and Finished Leather) from the footwear industry. After the stabilization period, <jats:italic>Brassica oleracea<\/jats:italic> seedlings and <jats:italic>Eisenia fetida<\/jats:italic> adults were exposed to these treatments. At the end of the experiment, a series of parameters were analysed in the <jats:italic>B. oleracea<\/jats:italic> leaves (leaf chlorophyl content, gas exchange measurements and photosynthetic parameters), in the <jats:italic>E. fetida<\/jats:italic> organisms (alkaline comet assay and biomarkers such as acetylcholinesterase and lipid peroxidation) and in the soils (total chromium content, enzymes activity and nitrogen mineralization and potential nitrification). In the case of soil\u2019s enzymatic activity, even though some were significantly altered, no negative effects could be attributed to the leather residues. Moreover, the addition of residues to the soil did not significantly affect the plant species; however, the same was not observed for the earthworm <jats:italic>E. fetida<\/jats:italic> when in contact with Finished Leather. Overall, Finished Leather residue was the one that caused more effects on the parameters analysed and therefore its disposal should be carefully examined.<\/jats:p>","DOI":"10.1007\/s11356-025-36824-3","type":"journal-article","created":{"date-parts":[[2025,8,2]],"date-time":"2025-08-02T11:14:29Z","timestamp":1754133269000},"page":"18892-18907","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["A multispecies microcosm to assess the effect of footwear wastes on soil biota: a contribution towards sustainability"],"prefix":"10.1007","volume":"32","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0238-2543","authenticated-orcid":false,"given":"Beatriz","family":"Fernandes","sequence":"first","affiliation":[]},{"given":"Ver\u00f3nica","family":"Nogueira","sequence":"additional","affiliation":[]},{"given":"Sirine","family":"Bouguerra","sequence":"additional","affiliation":[]},{"given":"Cristiano","family":"Soares","sequence":"additional","affiliation":[]},{"given":"Fernanda","family":"Fidalgo","sequence":"additional","affiliation":[]},{"given":"Joana","family":"Machado","sequence":"additional","affiliation":[]},{"given":"Susana M. 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