Novel　gold　nanoparticles　(AuNPs)　deposited　activated　carbon　fiber　cloth　(ACFC)　was　successfully　developed　in　this　study.　This　material　showed　great　potential　in　combining　with　an　electrothermal　swing　(ETS)　system　to　sustainably　adsorb　and　recover　low-concentration　elemental　mercury　(Hg-0)　in　gas　stream.　ACFC　with　Au　loading　ratio　of　0.5　wt%　(0.5　wt%-ACFC-THPC)　demonstrated　the　largest　Hg-0　adsorption　capacity.　Hg　temperature　programmed　desorption　results　suggested　that　Hg0　was　physically　adsorbed　by　AuNPs　on　Au-ACFC-THPC　via　amalgamation,　while　it　was　both　physically　and　chemically　adsorbed　by　pore　structures　or　carbonyl　groups　on　Raw-ACFC.　The　Hg-0　adsorption　efficiency　of　0.5　wt%-ACFC-THPC　was　approximately　95%　and　remained　stable　during　the　cyclic　ETS　operation　under　various　Hg0　inlet　concentrations　(30,　75,　and　100　mu　g　m(-3));　however,　the　adsorption　efficiency　of　Raw-ACFC　greatly　decreased　to　65-75%　as　Hg0　inlet　concentration　increased　to　75　and　100　mu　g　m(-3).　Furthermore,　the　regeneration　efficiencies　of　all　ACFCs　were　＞　90%　within　6　min;　indicating　the　promising　application　in　concentrating　Hg-0　vapor　and　the　subsequent　recovery　process.　Mass　transfer　models　for　the　simulation　of　Hg-0　desorption　within　ACFCs　were　further　conducted;　the　simulation　results　suggested　that　intraparticle　diffusion　dominated　the　desorption　process　for　both　Raw-ACFC　and　0.5　wt%-ACFC-THPC.