Adsorption-Based Removal of Sb (III) from Wastewater by Graphene Oxide-Modified Zirconium-Based Metal-Organic Framework Composites

The treatment of Sb (III) wastewater produced from mining activities is uniquely challenging and has therefore garnered increasing attention. Here, an amino-modified zirconium-based metal-organic framework material (UiO-66-NH2) its composites were loaded onto graphene oxide (GO@UiO-66-NH2) via the hydrothermal method, after which these materials used to adsorb in mine wastewater. effects adsorption time, pH, initial concentration, temperature, adsorbent dosage on removal performance then investigated. processes examined kinetic, isotherm, thermodynamic analyses. XRD, SEM, FTIR analyses demonstrated presence a porous structure high levels oxygen-containing functional groups UiO-66-NH2 GO@UiO-66-NH2 surfaces. During process, rates very fast first 10 minutes, equilibrium was achieved 12 h, with efficiencies 91.76% 93.79%, respectively. At pH 7.0, 25°C, concentration 100 mg/L, 0.04 g/L, maximum capacities reached 39.23 mg/g 61.07 mg/g, process accurately described by Langmuir model, meaning that adsorbed through single-layer uniform adsorption. Moreover, highly consistent pseudo-second-order indicative spontaneous endothermic chemical Additionally, efficiency could be maintained approximately 70% sorption-desorption recycling four times. Therefore, our study provides economical effective method for treatment.