A　valonea　tannin-immobilized　cellulose-based　aerogel　(VTCA)　was　prepared　by　introducing　valonea　tannin　into　cellulose　through　crosslinking　reaction　in　the　of　NaOH/urea/H2O　solvent　system.　The　structure　and　property　of　VTCA　was　characterized　by　SEM-EDS,　FT-IR,　XRD,　etc.,　and　the　adsorption　behavior　for　Ag(I)　in　aqueous　solution　was　also　investigated.　The　results　showed　that　the　three-dimensional　VTCA　displayed　obvious　porous　structure　with　a　porosity　of　97.95%,　and　exhibited　good　adsorption　efficiency　(＞75%)　for　Ag(I)　under　a　wide　pH　range　(1-8).　The　Ag(I)　adsorption　process　obeyed　the　pseudo-second-order　kinetic　model　and　the　Langmuir　adsorption　isotherm　model.　High　temperature　was　favorable　for　adsorption,　and　the　maximum　theoretical　adsorption　capacity　was　147.2mg/g.　The　mechanism　of　Ag(I)　adsorption　involved　two　process:　Ag(I)　was　firstly　adsorbed　onto　the　surface　of　VTCA　through　the　electrostatic　attraction　and　chelation　effects,　and　then　in　situ　reduced　to　Ag0　by　the　phenolic　hydroxyl　group　on　the　tannin　structure.　All　the　results　revealed　that　VTCA　owned　good　adsorption　and　reduction　performance　and　could　achieve　the　recycling　of　Ag(I)　in　water.　©　2024　Chinese　Society　for　Environmental　Sciences.　All　rights　reserved.