Due　to　the　low　concentration　of　silver　in　water,　most　of　the　cellulose　adsorbents　exhibited　low　removal　efficiency,　which　greatly　limited　their　practical　applications.　Herein,　a　cellulose　aerogel　modified　by　thiosemicarbamide　(CAT)　was　fabricated　for　reducing　and　adsorbing　silver　ions　from　low　concentration　wastewater.　The　characterization　results　concluded　that　CAT　owned　a　three-dimensional　spongy　structure　with　many　circular　microspheres　and　a　better　specific　surface　area　(19.37　m(2)　g(-1)),　as　well　as　the　functional　groups　of　CN+H　and　(CS)N.　The　static　batch　adsorption　experiments　demonstrated　that　CAT　could　reached　the　maximum　removal　percentage　of　94.94%　and　adsorption　capacity　of　42.12　mg　g(-1)　under　the　initial　concentration　of　Ag(I)　was　15　mg　L-1　and　the　pH　value　was　7.　Meanwhile,　the　adsorption　of　Ag(I)　on　CAT　was　second-order　reaction,　and　the　Langmuir　model　could　better　fit　the　adsorption　process.　In　addition,　CAT　exhibited　wide　pH　values　(1-9)　adaptability　and　excellent　adsorption　performance　for　silver　through　electrostatic　interaction,　chelation,　and　reduction.　This　study　probably　provides　a　new　method　as　well　as　important　experimental　data　and　theoretical　reference　for　the　removal　of　silver　ions　and　other　metals.