The Adsorption Behaviors Of Tetraphenylimidodiphosphinate And Its Potassium On Thorium (?) And Uranium (?)

Tetraphenylimidodiphosphinate(Htpip) has similar structure with acetyl acetone, and has stronger polar P=O and larger substituent,and these characteristics are benefit for improving the electron mobility of the complexes and inhibiting molecular stacking. Hence, Htpip has been favored by the majority of the researchers about organic lightemitting diode.Htpip with the amino group and the phosphorus group, moreover,the SEM images showed that the Htpip was highly monodisperse,irregular and porous which provided the possibility for the enrichment of radioactive elements in aqueous solution. Therefore, the adsorption behaviors of thorium(IV) and uranium(VI) was studied as the following aspects:1. The treatment methods of radioactive waste water and the application of Htpip had been summarized, and the feasibility analysis of the project had been made.2. Htpip and Ktpip had been prepared and characterized by FT-IR,1HNMR, 31P{1H}NMR and SEM, the results testified the synthetic route was reasonable.3. The adsorption behaviors of Htpip on thorium and uranium from aqueous solution had been studied, and the influence of contact time, pH,adsorbent dosage, initial concentration and interfering ions had been explored. The experimental results were indicated as follow: 298 K,pH=4.5, contact time 3 h, the adsorbent dosage 0.010 g and the initial concentration 30 mg·L-1, the adsorption capacity of thorium(IV) on Htpip was 29.68 mg·g-1, the removal percentage of thorium(IV) was 98.95 %,and interfering ions the had almost no effect on thorium(IV) adsorption;298 K, pH=4.5, contact time 20 min, the adsorbent dosage 0.005 g and the initial concentration 50 mg·L-1, the adsorption capacity of uranium(VI) was 99.86 mg·g-1, the removal efficiency was 99.86 %, and the interfering ions had almost no effect on uranium(VI) adsorption.4. The adsorption behavior of UO22+ on Ktpip in aqueous solution was investigated. The effects of contact time and pH were explored. The experimental results were as follow: 298 K, pH=4.5, contact time 20 min,the adsorption capacity of uranium(VI) was 182.55 mg·g-1.