In　this　study,　a　new　ionic　liquid　functionalized　cross-linked　chitosan　(IL-CCS)　was　prepared　and　utilized　as　an　adsorbent　for　removing　sunset　yellow　FCF　(SY)　from　aqueous　solutions.　The　physicochemical　properties　of　the　adsorbent　were　characterized　using　infrared　spectroscopy　(IR),　scanning　electron　microscope　(SEM),　nitrogen　adsorption-desorption　isotherms　and　thermogravimetric　analysis　(TG).　The　effects　of　the　experimental　parameters　such　as　initial　pH,　the　adsorbent　dose　and　contact　time　on　the　absorption　process　of　SY　on　IL-CCS　were　investigated　in　detail.　The　results　showed　that　the　adsorption　capacity　of　IL-CCS　for　SY　had　no　significant　differences　when　pH　of　the　solution　changed　from　2.0　to　10.0,　and　the　maximum　adsorption　capacity　of　IL-CCS　was　30028　mg/g,　obviously　higher　than　that　of　CCS　(36.08　mg/g).　In　addition,　the　results　of　adsorption　isotherm,　kinetic　and　thermodynamics　showed　that　the　adsorption　process　could　fit　with　Langmuir　model,　pseudo-second　order　model,　separately.　The　exothermic　nature　of　the　reaction　was　revealed　through　thermodynamic　parameters.　From　the　above,　IL-CCS　has　a　good　prospect　for　treatment　of　wastewater　containing　anionic　dyes　due　to　high　efficiency　adsorption　during　a　broad　pH　range.　(C)　2019　Elsevier　B.V.　All　rights　reserved.