Inorganic speciation of dissolved rare earth elements (REEs) were calculated for Chaohu Lake and Longganhu Lake by using the program MINTEQ 2.30. The result shows that REE-Carbonate complexes, which account for more...
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Inorganic speciation of dissolved rare earth elements (REEs) were calculated for Chaohu Lake and Longganhu Lake by using the program MINTEQ 2.30. The result shows that REE-Carbonate complexes, which account for more than 93% of total REE are the dominate and typically species in solution. Moreover, carbonator complexes (Lnco3^+ ) were predicted to be the dominant species when pH between 7.2 and 8.0 and bicarbonate complexes (Ln (co3)2^-) were predicted to be the dominant species when pH 〉 8.0. The free ion specie (i .e., Ln^3+ ) increases in these waters with pH decreasing and accounts for about 5.03 %. The percentage of REE-phosphate complexes account for 1.61% of the dissolved REEs. REE-phosphate for light REEs complexes are supersaturated in Chaohu Lake and Longganhu Lake. Furthermore, LnPO4 for heavy REEs are supersaturated in west of Chaohu Lake in high water period. PO4^3- is responsible for limiting the dissolved REEs concentrations. REE-sulfate, REE-chloride, REE-fluoride and REE-hydroxide complexes, are negligible and generally account for less than 1% of the total dissolved REEs.
The molecular dynamics simulation method was adopted to study the transient characteristics of Li^+,co3^2-,and SO4^2- in Na^+,K^+,Li^+,Cl^-,and SO4^2-/H2O *** composition of Na^+,K^+,Li^+,Cl^-,SO4^2- and co3^2- was se...
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The molecular dynamics simulation method was adopted to study the transient characteristics of Li^+,co3^2-,and SO4^2- in Na^+,K^+,Li^+,Cl^-,and SO4^2-/H2O *** composition of Na^+,K^+,Li^+,Cl^-,SO4^2- and co3^2- was selected to optimize the initial structural model and conduct dynamic *** mean azimuth shift and diffusion coefficient of Li^+,co3^2-,and SO4^2- in the system,the radial distribution function and potential energy between Li^+ and -OW,SO4^2- and -OW as well as co3^2- and -OW,and the dielectric constant of hydrogen bond were expounded and *** the same time,the Li enrichment behavior in the evaporation process of salt lake brine was analyzed based on the simulated *** results show that the simulation results are in good agreement with the experimental values,which verifies that,compared with other ions,the crystallization of Li^+ and SO4^2- occurs earlier after reaching saturation.
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