<p>The discharge of untreated wastewater containing synthetic dyes from the industry significantly pollutes water sources. Metal–Organic Frameworks especially Zeolitic Imidazolate Framework-8 have emerged as promising materials in dye wastewater treatment, offering innovative potential for mitigating this pollution. In this research study, the amino-functionalized Zeolitic Imidazole Framework-8 was synthesized and characterized using Field-Emission Scanning Electron Microscopy, Energy Dispersive X-ray Spectroscopy, Fourier Transform Infrared Spectroscopy, X-ray Diffraction, X-ray Photoelectron Spectroscopy and Brunauer–Emmett–Teller. The suitability of amino-functionalized Zeolitic Imidazole Framework-8 for dye removal was determined via a batch adsorption study, and the effects of several adsorption factors were investigated, including the initial concentration of methyl blue (40–200&#xa0;ppm) the effect of pH condition (pH 3–11), and reaction time (30–180&#xa0;min). Several kinetic isotherm models, including Langmuir, Freundlich, Pseudo First Order, and Pseudo Second Order, were applied to ascertain the adsorption mechanism. From the results obtained, the adsorption capacity of amino-functionalized Zeolitic Imidazole Framework-8 recorded is 537.4 mg/g. The adsorption isotherm is well-suited to the Freundlich model (R² = 0.9453) and the kinetic of adsorption is most fitted with Pseudo-second order (R² = 0.9999). Thus, these results suggest that amino-functionalized Zeolitic Imidazole Framework-8 is a highly efficient adsorbent for methyl blue, operating predominantly through multilayer adsorption and chemisorption. For future research, it is recommended to study the selectivity of amino-functionalized Zeolitic Imidazole Framework-8 for various dyes and contaminants, as well as to evaluate its performance in real wastewater samples to assess its practical applicability in complex matrices.</p> Graphical Abstract <p></p>