Crystalline coordination complexes of actinides,especially in atypical oxidation states,are not only fundamentally important for expanding the notably limited knowledge on the bonding nature of actinides but could als...Crystalline coordination complexes of actinides,especially in atypical oxidation states,are not only fundamentally important for expanding the notably limited knowledge on the bonding nature of actinides but could also provide critical information toward the development of nuclear fuel cycle,waste management,and national security.Plutonium(Pu)is the only element in the periodic table that could exist in four oxidation states in aqueous solutions simultaneously.展开更多
The behaviours of complexation and dissolution of PbCl2 on the surface of galena were investigated to explore the process of hydro-chemical conversion of galena(PbS)in chloride media.By means of solution chemistry cal...The behaviours of complexation and dissolution of PbCl2 on the surface of galena were investigated to explore the process of hydro-chemical conversion of galena(PbS)in chloride media.By means of solution chemistry calculation,the production and dissolution of the products PbCl2 were studied.And the passivation of the galena was studied by Tafel curve.The results show that PbCl4 2-is the main form of PbCl2 presented in the saturated potassium chloride(KCl)solution.The PbCl2 crystal is easy to precipitate when the total concentration of chloride ion([Cl -]T)is equal to 0.92 mol/L,and it is inclined to dissolve when[Cl -]T is more than 0.92 mol/L.The chloride complexing reaction rate strongly depends on the Fe3 +ion concentration when it is less than 6× 10-4mol/L,while passivation occurs on the surface of the electrode when Fe 3+concentration is larger than 6×10 -4mol/L.The reaction rate increases obviously when KCl is added,since the activity of Cl-increases;thus accelerates the dissolution of PbCl2.展开更多
基金funding support from the Science Challenge Project(TZ2016004)the National Natural Science Foundation of China(21825601,21790374,21806118,and 21727801)+1 种基金The computational work was financially supported by the Foundation of President of China Academy of Engineering Physics(no.YZJJSQ2017072)by the National Natural Science Foundation of China(21590792,21433005,and 21701006).
文摘Crystalline coordination complexes of actinides,especially in atypical oxidation states,are not only fundamentally important for expanding the notably limited knowledge on the bonding nature of actinides but could also provide critical information toward the development of nuclear fuel cycle,waste management,and national security.Plutonium(Pu)is the only element in the periodic table that could exist in four oxidation states in aqueous solutions simultaneously.
基金Project(50774094)supported by the National Natural Science Foundation of China
文摘The behaviours of complexation and dissolution of PbCl2 on the surface of galena were investigated to explore the process of hydro-chemical conversion of galena(PbS)in chloride media.By means of solution chemistry calculation,the production and dissolution of the products PbCl2 were studied.And the passivation of the galena was studied by Tafel curve.The results show that PbCl4 2-is the main form of PbCl2 presented in the saturated potassium chloride(KCl)solution.The PbCl2 crystal is easy to precipitate when the total concentration of chloride ion([Cl -]T)is equal to 0.92 mol/L,and it is inclined to dissolve when[Cl -]T is more than 0.92 mol/L.The chloride complexing reaction rate strongly depends on the Fe3 +ion concentration when it is less than 6× 10-4mol/L,while passivation occurs on the surface of the electrode when Fe 3+concentration is larger than 6×10 -4mol/L.The reaction rate increases obviously when KCl is added,since the activity of Cl-increases;thus accelerates the dissolution of PbCl2.
基金supported by the National Natural Science Foundation of China(21073013,91026000,91226105)Chinese Academy of Sciences Hundred Talent Program(Y2291810S3)~~
