Agglomeration　and　passivation　of　nanoscale　zerovalent　iron　(nZVI)　can　result　in　significant　decrease　of　reactivity　with　contaminants.　In　this　paper,　reduced　graphene　oxide　supported　Fe/Ni　bimetallic　composites　(Fe/Ni@rGO)　were　synthesized.　Electron　microscopy　characterization　showed　that　the　spherical　Fe/Ni　bimetallic　nanoparticles　with　the　size　of　70–150　nm　were　successfully　loaded　on　the　graphene　sheets　and　mainly　distributed　at　the　edges　and　folds　of　the　graphene　sheets.　The　agglomeration　of　nZVI　decreased　significantly　and　more　active　sites　were　exposed.　The　removal　efficiency　of　2,4-dichlorophenol　by　nZVI,　reduced　graphene　oxide　supported　nZVI　(Fe@rGO)　composites　and　Fe/Ni@rGO　composites　were　14.4%,　71.8%　and　95.0%　within　180　min,　respectively.　The　results　showed　that　when　the　pH　was　5–7　and　humic　acid　concentration　was　60　mg/L,　the　removal　efficiency　of　2,4-dichlorophenol　was　higher.　According　to　the　correlation　coefficient　R2,　the　removal　of　2,4-dichlorophenol　by　Fe/Ni@rGO　followed　the　pseudo　second　order　model　instead　of　the　pseudo　first　order　model.　The　anti-oxidation　and　cycle　test　showed　that　Fe/Ni@rGO　composites　had　high　stability　and　recycling　value.　The　removal　mechanism　of　2,4-dichlorophenol　by　Fe/Ni@rGO　composites　was　the　synergistic　effect　of　adsorption　by　rGO　and　dechlorination　by　Fe/Ni.　©　2023　Elsevier　Ltd