1. Introduction2. Experimental conditions2.1. Materials2.2. Geopolymers preparation2.3. Methylene blue adsorption tests2.4. Methylene blue desorption tests2.5. Geopolymer regeneration tests2.6. Materials characterisation3. Results and discussion3.1. Slurries calorimetric characterisation3.2. Geopolymers characterisation3.3. MB adsorption tests3.3.1. Influence of contact time3.3.2. Influence of MB initial concentration3.3.3. Isotherm model studies3.4. MB desorption tests3.5. Geopolymer regeneration tests4. ConclusionsAcknowledgementsAppendix A. Supplementary dataReferences