1-1型三元乙酸盐水溶液体系的电导率实验

Electrical conductivity of 1-1 type aqueous acetate ternary solution systems

中文关键词: 电导率  溶液  乙酸盐  钾  钠  银离子

英文关键词: electrical conductivity  solution  acetate  potassium  sodium  silver ion

中文摘要:

      工作溶液的电导特性对盐差能驱动的逆电渗析电池堆性能影响显著。建立电导率测试装置,在变溶 液浓度和温度条件下,测试了 KAc-AgAc-H2O、LiAc-AgAc-H2O、NaAc-AgAc-H2O 和 NaAc-SDBS-H2O 四组 三元溶液体系的电导率。结果显示:在10~60 ℃内,乙酸盐溶液电导率均随溶液浓度和温度的增加而增加, 平均提升率近 20%/10 ℃;而 在 相 同 溶 液 浓 度 和 温 度 下,电 导 率 排 序 由 大 至 小 为κ(KAc-AgAc-H2O)> κ(NaAc-AgAc-H2O)>κ(LiAc-AgAc-H2O);实验发现当乙酸纳水溶液中4%的溶质被 SDBS替换,则溶液体 系的电导率能被有效提升,但添加同样质量分数的 AgAc,却未能促成电导率的增大。最后利用高斯振幅方 程关联所测乙酸盐溶液体系的电导率。

英文摘要:

      The performance of a reverse electrodialysis cell driven by the salinity gradient energy is significantly influenced by the electrical conductivity characteristic of the working solution. An electrical conductivity measurement system was built. And the electrical conductivities of KAc-AgAc-H2O, NaAc-AgAc-H2O, LiAc-AgAc-H2O, and NaAc-SDBS-H2O solutions were measured under varying solution concentration and temperature conditions. The results demonstrate that electrical conductivities of these four ternary solutions are elevated with the increase of either the solution concentration or temperature within the temperature range of 10 to 60℃ . And the average increase rate is approximately 20%/10℃ . Electrical conductivity is observed to be decreased in the order: κ(KAc-AgAc-H2O) > κ(NaAc-AgAc-H2O) > κ(LiAc-AgAc-H2O) at the same solution concentration and temperature conditions. Itis also found that electrical conductivity of the aqueous potassium sodium solution is significantly increased if a mass fraction of solute (4% ) is substituted by SDBS. However, it makes little electrical conductivity variation if adding the same fraction of silver acetate. Finally, the Gaussian amplitude equation was applied appropriately to correlate the measured electrical conductivity data.