Title Recovery of Ruthenium from waste water by extraction with crown ether using DFT method Type Presentation Keywords Ruthenium, DFT, Crown ether, waste water, Extraction Abstract Crown ether complexes are the best compound and stable material. Ruthenium crown ether complexes was extracted theoretically by density functional theory from waste water in this study by b3lyp/lanl2dz basis set and considered it could be used in experimental process. Researchers razieh razavi (First researcher)