Original ResearchPublished 3 September 2026Valorisation of banana peel waste for copper (II) and chromium (VI) biosorption from aqueous solution: classical and fractal-like kinetics and isotherms model analysisSthembile Mzimela · Babatunde Femi Bakare · Paul Musonge · Siphesihle Mangena KhumaloFrontiers in Environmental Engineeringdoi 10.3389/fenve.2026.1945870