Original ResearchPublished 2 October 2026Enhanced greywater treatment in a two-stage green wall system by incorporating waste-derived adsorbentsMoeen Gholami · Aisling D. O’Sullivan · Yunkai Tan · Tianwei Hao · Hamish R. MackeyFrontiers in Environmental Engineeringdoi 10.3389/fenve.2026.1924831