Herein,　following　the　strategy　of　sustainable,　environment　protection,　circular　economy　development,　carboxylate-modification　lignosulfonate　polymer　(M-LSP)　was　synthesized　from　lignosulfonate　by　solvent-free　esterifying　with　maleic　anhydride　(MA)　by　one　step,　and　was　used　to　remove　the　dyes　by　adsorption.　FT-IR　and　XPS　were　used　to　confirm　successful　preparation　of　M-LSP.　The　result　is　that:　M-LSP　is　apt　W　adsorb　cationic　dye.　In　single　system,　the　super　adsorption　performance　of　M-LSP　for　methylene　blue　(MB)　is　depended　on　the　carboxyl　content　in　M-LSP.　M-LSP　performs　its　remarkable　adsorption　performance　for　MB　stably　at　pH　7.0　similar　to　10.0,　and　the　maximum　adsorption　capacity　of　M-LSP　for　MB　is　up　to　613.5　mg/g　according　to　Langmuir　isotherm　model.　The　Langmuir　isotherm　and　pseudo-second-order　kinetic　models　are　more　suitable　to　desoipt　adsorption　process　of　M-LSP　for　MB.　In　binary　and　ternary　system,　the　M-LSP　adsorbs　the　cationic　dyes　simultaneously,　but　selectively　adsorbs　MB.　M-LSP　can　effectively　remove　cationic　dyes　in　simulate　dyestuff　water.　Moreover,　the　removal　percentage　of　regenerated　M-LSP　decreases　only　8.4%　after　4　desorption-resorption　cycles.　The　results　indicated　that　M-LSP　could　be　a　candidate　for　remediation　of　real　printing　and　dyeing　or　textile　wastewater　containing　cationic　dyes.　(C)　2020　Published　by　Elsevier　B.V.