Adsorption of cesium on mesoporous SBA-15 material containing embedded copper hexacyanoferrate

In this research, the copper hexacyanoferrate/SBA-15 composite was prepared by embedding method, which was further characterized using scanning electron microscope, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, Brunauer-Emmett-Teller, transmission electron microscopy and X-ray diffraction. The effects of different factors such as pH, temperature, contact time, initial cesium concentration on adsorption were studied. The pH significantly influenced the adsorption. The pseudo second-order kinetic model fitted the adsorption well, indicating chemisorption. The Langmuir isotherm proved that the adsorption happened on monolayer and the maximum adsorption capacity was determined as 0.123mmol/g. The result showed that CHCF/SBA-15 could be directly used to adsorb cesium from aqueous solution.