A　novel　low-cost　adsorbent　named　chitosan/Al(OH)3·(CS/Al(OH)3)　bead　was　successfully　prepared　by　employing　AlCl3·6H2O　aqueous　solution　as　the　solvent　for　CS.　The　CS/Al(OH)3　beads　were　used　for　fluoride　removal　from　water.　The　beads　were　synthesized　using　the　chitosan　and　aluminum　chloride　with　the　mass　ratio　of　2:1　as　the　precursor　and　in　situ　generation　of　aluminum　hydroxide　sorbents　in　sodium　hydroxide　solution.　Then,　the　beads　were　washed　with　distilled　water　to　neutral　and　freeze　dried.　The　sorbents　were　characterized　using　scanning　electron　microscopy　(SEM),　energy　dispersive　X-ray　spectrometry　(EDX),　Fourier　transform　infrared　spectrometry　(FTIR),　and　X-ray　diffractometry　(XRD),　respectively. Batch　adsorption　experiments　were　conducted　to　evaluate　the　parameters　that　affected　the　defluoridation　capacity.　The　influencing　parameters　including　pH,　co-existing　ions　in　water　and　initial　temperature　of　the　adsorption　process　were　studied.　The　influence　of　temperature　confirmed　that　the　adsorption　was　spontaneous　and　endothermic.　The　adsorption　isotherm　of　fluoride　followed　Langmuir　isotherm　model　and　the　sorption　kinetics　was　more　suitable　for　pseudo-second-order　kinetic　model.　The　defluoridation　capacity　of　chitosan/Al(OH)3　calculated　using　Langmuir　model　was　23.06 mg/g　(293 K,　pH　4).　The　experimental　results　showed　that　the　CS/Al(OH)3　bead　adsorbent　is　promising　for　the　fluoride　adsorption.　©　2018,　Iran　Polymer　and　Petrochemical　Institute.