Cellulose　aerogel　adsorbent　(CAA),　a　novel,　effective,　and　green　adsorbent,　which　contains　tertiary　amino　groups,　was　surface　modified　by　poly(N,N-dimethyl　aminoethyl　methacrylate)　and　sol-gel　methods.　It　has　both　adsorption　and　reduction　functions　and　can　be　utilized　to　remove　chlorate　(ClO3-)　from　drinking　water.　In　the　static　adsorption　experiments,　the　CAA　effectively　removed　ClO3-,　even　at　low　initial　concentrations.　The　adsorption　kinetics　showed　that　the　adsorption　equilibrium　could　be　reached　within　20　min.　Additionally,　the　experimental　data　was　fitted　to　several　adsorption　models,　including　the　pseudo-first-order　kinetic　model,　pseudo-second-order　kinetic　model,　intra-particle　reaction　diffusion　equation,　and　Langmuir　and　Freundlich　isotherms.