氯化钠存在下中重族氯化物水溶液的密度和介电渗透率

Yuliya I. Kurmaeva, M. A. Afonin, Andrey I. Fischer
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引用次数: 0

摘要

采用分光光度法测定了中重族稀土元素与NaCl混合溶液的密度。研究了pH = 1.5条件下,含0.05 ~ 1.73 mol/dm3的中重族镧系氯化物浓度分别为10、50、100、150、200、220 g/dm3的NaCl水溶液。在0.5 ~ 110 MHz频率范围内测量了水相中REE浓度为0.05 ~ 0.75 mol/dm3, NaCl浓度为150 g/dm3的溶液的介电常数。建立了溶液密度与NaCl浓度、稀土元素浓度和介电常数的经验方程。这些方程使得从溶液的密度和REE的总浓度计算氯化钠的浓度成为可能。根据经验公式,可以计算出在已知氯化钠浓度下,水溶液的介电常数为中-重基团的REE氯化物和的浓度
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DENSITY AND DIELECTRIC PERMEABILITY OF AQUEOUS SOLUTIONS OF REE CHLORIDES OF MEDIUM-HEAVY GROUP IN PRESENCE OF SODIUM CHLORIDE
The densities of mixed solutions of rare-earth elements of the medium-heavy group with NaCl were determined by the pycnometric method. Aqueous solutions of NaCl with concentrations of 10,50,100,150,200, 220 g/dm3 containing lanthanide chlorides of the medium-heavy group with a concentration range from 0.05 mol/dm3 to 1.73 mol/dm3 at pH = 1.5 were studied. Dielectric permittivity of solutions with the concentration of the aggregate REE in the aqueous phase from 0.05 mol/dm3 to 0.75 mol/dm3 and NaCl concentration equal to 150 g/dm3 was measured in the frequency range from 0.5 to 110 MHz. Empirical equations were constructed that relate the density of the solution to the concentration of NaCl, to the concentration of the sum of rare-earth elements, and to the dielectric permittivity. These equations make it possible to calculate the concentration of sodium chloride from the density of solution and from the aggregate REE concentration. The empirical formula makes it possible to calculate the concentration of the sum of REE chlorides of the medium-heavy group at a known concentration of sodium chloride from the dielectric permittivity of the aqueous solution
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