Bruna Bacaro Borrego

1 Introduction Automotive oils are essential for lubricating and ensuring the proper functioning of vehicle mechanical components. Their composition varies depending on the additives used, but they primarily consist of aliphatic, monoaromatic, diaromatic and polycyclic aromatic hydrocarbons (PAHs), along with heavy metals (e.g., zinc and lead) (Patel et al. 2021; Bulai et al. 2021).

Conflict of interest The authors have no relevant financial or non-financial interests to disclose. References 1 , and , Biotechnological aspects of mangrove microorganisms, in Biotechnological Utilization of Mangrove Resources. Cambridge: Academic Press, pp. 381–398 (2020). https://doi.org/10.1016/B978-0-12-819532-1.00018-4. 2 , , and , Biodiversity and biotechnological potential of microorganisms from mangrove ecosystems: a review. Ann Microbiol 63: 1–19 (2013).

Abstract The chemical synthesis of monoatomic metallic copper is unfavorable and requires inert or reductive conditions and the use of toxic reagents. Here, we report the environmental extraction and conversion of CuSO4 ions into single-atom zero-valent copper (Cu0) by a copper-resistant bacterium isolated from a copper mine in Brazil. Furthermore, the biosynthetic mechanism of Cu0 production is proposed via proteomics analysis.