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Methylene Blue (MB), a cationic dye extensively utilized in the textile and pharmaceutical sectors, presents significant hazards to aquatic environments and human health. Exposure to MB may result in negative effects, including dermal irritation, stomach discomfort, and possible long-term ecological consequences. This research investigates the elimination of MB from synthetic industrial wastewater utilizing a geopolymer derived from Partially De-aluminated Metakaolin (PDK) by using adsorption technique it is a simple, low-cost, and effective method for removing a variety of pollutants. The geopolymeric materials were analysed using XRF, XRD, FTIR, SEM, EDX, and BET to confirm its structure then used for MB removal. The specific surface area of the geopolymer was determined to be 9.3 m\n                    <jats:sup>2<\/jats:sup>\n                    \/g and a pore volume of 0.024 m\n                    <jats:sup>3<\/jats:sup>\n                    \/g. Its kinetics and isotherms were investigated in the MB dye adsorption experiments. The adsorption was influenced by dose, initial dye concentration, pH, and contact time. According to the results, the maximum adsorption capacity (8\u00a0mg\/g) was attained at 60\u00a0mg\/L MB, 60\u00a0min of contact time, and pH 7\u201312 for one hour. The experimental data indicated that Freundlich isotherm model was the best-fit model to describe the sorption of MB on the synthesised geopolymer with higher determination coefficients R\n                    <jats:sup>2<\/jats:sup>\n                    of 0.996. Value of n greater than unity indicates a favourable adsorption taking place. This indicated that the adsorption occurs under a multilayer and heterogeneous surface for MB. The adsorption kinetics of MB onto GP was investigated using pseudo first order, and pseudo second order models as shown in, using the experimental data at various initial concentrations. The calculated parameters values obtained from the application of three models are tabulated. By comparing R\n                    <jats:sup>2<\/jats:sup>\n                    for each applied model and the compatibility between the estimated and observed q\n                    <jats:sub>e<\/jats:sub>\n                    values, the most favourable model may be identified. The pseudo 2\n                    <jats:sup>nd<\/jats:sup>\n                    order R\n                    <jats:sup>2<\/jats:sup>\n                    value are greater than other models.\n                  <\/jats:p>","DOI":"10.1038\/s41598-025-01461-w","type":"journal-article","created":{"date-parts":[[2025,5,21]],"date-time":"2025-05-21T04:47:51Z","timestamp":1747802871000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":30,"title":["Removal of methylene blue from synthetic industrial wastewater by using geopolymer prepared from partially dealuminated metakaolin"],"prefix":"10.1038","volume":"15","author":[{"given":"Khaled","family":"Elewa","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"A. 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