The　aim　of　this　study　is　to　improve　the　adsorption　performance　for　Pb(II)　ions　of　a　novel　two-dimensional　Ti2CTx　MXene.　Three　biosurfactants,　chitosan　(CS,　a　cationic　surfactant),　lignosulfonate　(LS,　an　anionic　surfactant)　and　enzymatic　hydrolysis　lignin　(EHL,　a　non-ionic　surfactant),　were　used　to　functionalize　the　Ti2CTx　nanosheets.　The　samples　were　characterized　by　using　Field-emission　scanning　electron　microscopy,　Fourier　infrared　spectroscopy,　X-ray　diffraction　and　Nitrogen　adsorption-desorption　isotherms,　their　adsorption　performances　for　Pb(II)　ions　were　investigated　by　bath　adsorption　experiments　under　various　adsorption　conditions　including　different　types　of　biosurfactants,　pH　value,　initial　Pb(II)　ions　concentration,　adsorbent　concentration,　contact　time　and　adsorption　temperature.　Results　revealed　that　the　non-ionic　surfactant　EHL　prevents　Ti2CTx　nanosheets　from　restacking　and　introduces　active　functional　groups　so　that　the　adsorption　performances　of　the　EHL-functionalized　Ti2CTx　nanosheets　are　promoted.　The　EHL-functionalized　Ti2CTx　displayed　a　maximum　adsorption　capacity　of　232.9　mg　g(-1)　for　Pb(II)　ions.　Moreover,　reaction　kinetics,　isotherms　and　thermodynamics　studies　were　analyzed　to　describe　the　adsorption　behaviors,　and　the　experimental　data　were　fitted　well　with　pseudo-second　order　model　and　Frendlich　isotherm.　The　results　showed　that　the　biosurfactants-functionalized　Ti2CTx　shows　improved　adsorption　performances　in　removal　of　Pb(II)　ions　and　has　great　potential　as　an　environmental　adsorption　material.　(C)　2019　Elsevier　B.V.　All　rights　reserved.