The origin of ultra-high-energy cosmic rays (UHECRs) remains a major open question in astrophysics. Observational data suggest that starburst galaxies and active galactic nuclei (AGN) are the most promising sources. However, accelerating particles to energies above 1 EeV in these environments is complex due to the demanding requirements on energy, density, and metallicity imposed by observations. In this work, we explore the theoretical challenge of explaining the presence of intermediate and heavy nuclei within the context of AGNs. The interaction of AGN jets with the winds of embedded stars leads to turbulent mixing and jet mass loading. The winds of Wolf-Rayet stars are rich in nuclei of Carbon-Nitrogen-Oxygen, and in this contribution we focus on the role of Wolf-Rayet stars in enhancing the metallicity of AGN jets. We estimate the flux of UHECRs from a Centaurus A-like radiogalaxy and find it to be comparable to the fluxes observed by the Pierre Auger Observatory under certain assumptions. We conclude that the proposed scenario is potentially one that could shed light on the sources of UHECRs.