Abstract:The extraction of associated resources from coal will inevitably produce a large amount of waste liquid with low concentration of germanium, which will lead to the loss of sparse metal germanium resources and pollute the environment. Tartaric acid modified iron Fe-Mn oxide (JFMBO) was used as adsorption material to concentrate and recover low concentration germanium in the recovery of coal leaching liquor. The crystal structures and surface properties of JFMBO were studied by XRD, BET, Zeta potential and other testing methods, and the adsorption behavior of JFMBO to germanium was explored. The results show that the optimum dosage of modified Fe-Mn oxide for adsorption of germanium is 2 g/L. The adsorption capacity of JFMBO to germanium shows a positive correlation with the pH of the solution. In addition, the adsorption capacity of JFMBO to germanium drops with the increase of ionic strength, and increasing the temperature is helpful for the adsorption reaction of JFMBO to germanium. The adsorption process of Ge on JFMBO can be described by quasi-second-order kinetic equation, and the adsorption isotherm of Ge on JFMBO is more consistent with the Langmuir model. The maximum saturated adsorption capacity of Ge on JFMBO is 169.535 μmol/g at 25 ℃. JFMBO can be recycled and still maintain a high adsorption efficiency after three cycles of adsorption-desorption.