Glycerol‐Assisted Modification of 3D‐Printed Zeolite (3D‐Ze/Gy) for Enhanced Methylene Blue Dye Removal in Aqueous Solutions

Natural zeolite faces challenges in wastewater treatment due to poor mechanical stability, handling difficulties, and limited reusability. To address these limitations, structured zeolite is fabricated using 3D printing, with glycerol as a porogenic agent to enhance porosity and adsorption capacity. Scanning electron microscope–energy dispersive X‐ray spectroscopy confirms successful fabrication and improves pore formation, while thermogravimetric/differential thermal analysis demonstrates stable thermal properties. The pHpzc values are 7.43 (3D‐Ze/Gy50) and 7.52 (3D‐Ze/Gy0), indicating minor surface charge changes after glycerol incorporation. Adsorption follows a pseudo‐second‐order kinetic model (chemisorption) and aligned with the Langmuir isotherm, confirming monolayer adsorption on a homogeneous surface. Thermodynamic analysis reveals that the adsorption process is endothermic and nonspontaneous at lower temperatures but becomes favorable at higher temperatures. The 3D‐Ze/Gy50 sample exhibits superior adsorption capacities of 1.35 mg g −1 at 15 mg L −1 and 2.04 mg g −1 at 25 mg L −1 Methylene blue concentrations outperform unmodified samples. Reusability tests show consistent performance over six cycles, with regeneration achieved via resintering at 600 °C for 2 h. These results validate the potential of 3D‐printed glycerol‐modified zeolite as a reusable, high‐performance adsorbent for wastewater treatment, offering an innovative approach for developing sustainable materials for environmental remediation.