{Retracting Note} J. Serb. Chem. Soc. 86 (9) 899 (2021) Note JSCS–5470 Published 17 August, 2021 899 Retracting Note Paper entitled "Bioleaching of copper, zinc and gold from a polymetallic ore flotation concentrate from Čoka Marin deposite (Serbia)", by J. Avdalović et al. https://doi.org/10.2298/JSC210127016A, published on August 1, 2021 in the OnLine First sections of the Journal of the Serbian Chemical Society has been retracted and withdrawn since the authors (corresponding author) did not approve galley proof prepared by Editorial office. Retracted manuscript was deposited in the DoiSerbia quarantine, Repository service of the National Library of Serbia: http://doiserbia.nb.rs/issue.aspx? issueid=1981 https://doi.org/10.2298/JSC210817062R https://doi.org/10.2298/JSC210127016A http://doiserbia.nb.rs/issue.aspx?‌issueid=1981 http://doiserbia.nb.rs/issue.aspx?‌issueid=1981 https://doi.org/10.2298/JSC210817062R