The interplay between mixing and reactive processes plays a pivotal role in a range of biogeochemical processes controlling the transport, transformation and turnover of chemical elements (McClain et al. 2003; Dentz et al. 2011; Valocchi et al. 2018). The study of these processes is of primary importance in many scientific disciplines and technical applications, including fluid mechanics, geochemistry, chemical engineering, reservoir engineering, subsurface and contaminant hydrology, water treatment, and remediation of contaminated sites. Mixing fronts often act as hot spots of biogeochemical reactions as they induce chemical disequilibrium and bring together reactants that may be otherwise...

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