Integrated effects of bioturbation, warming and sea-level rise on mobility of sulfide and metalloids in sediment porewater of mangrove wetlands

•Benthic bioturbation improved aerobic conditions and triggered the contrasting mobilities of As and Sb.•Sulfurized condition favored As mobilization/release but Sb sequestration/burial.•Warming enhancing bioturbation and thus oxic conditions leads to Sb mobilization and As sequestration.•Sea-level rise hampering bioturbation leads to anoxic As mobilization and Sb sequestration.