Adsorption and energetic heterogeneity properties of cesium ions on ion exchange resin

•Adsorption heterogeneity of cesium ion increased with increasing temperature and pH.•Equilibrium isotherm of cesium ion could be represented by the Lamgmuir equation.•Adsorption of cesium ion on exchange resin was spontaneous and endothermic.•Dynamic model simulated experimental adsorption breakthrough behavior of cesium ion.