Use of the Dead Sea brine as electrolyte for electrochemical generation of active chlorine
Use of the Dead Sea brine as electrolyte for electrochemical generation of active chlorine
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DOI：
10.1080/19443994.2012.749576
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发表时间：
2013-04-01
影响因子：
1.1
通讯作者：
Al-Hamaiedeh, Husam D.
中科院分区：
文献类型：
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作者：
Al-Hamaiedeh, Husam D.
在这项研究中，来自死海的盐水被用作活性氯 (AC) 化合物电化学生产中的氯化物源（电解质）。由于其盐水的盐度很高，死海的盐度约为 30%，是世界上最咸的水。研究发现，使用死海盐水电解液生产交流电所消耗的电量约为使用 40 克/升氯化钠电解液生产相同量交流电所消耗电量的 35-45%。死海盐水中AC的生成率明显高于氯化钠电解液中AC的生成率；电解20分钟后增加95%。由于电极上沉积物的积累，随着时间的推移，交流发电率下降，电力消耗率增加。盐水高速循环通过电解池减少了电极沉积。最佳工艺参数即阳极电流密度和电解液体积与电池体积之比分别为1200A/m(2)和10-15。与由 NaCl 电解液生成的 AC 的消毒效率相比，死海盐水中 Ca++ 和 Mg++ 的存在提高了生成的 AC 的消毒效率。
In this study, brine derived from the Dead Sea has been used as a chloride source (electrolyte) in the electrochemical production of active chlorine (AC) compounds. Due to the high salinity values of its brine, the Dead Sea is the saltiest water in the world due to its salinity value of about 30%. The rate of electricity consumed to produce AC when using Dead Sea brine electrolyte was found to be about 35-45% of the rate used to produce the same amount of AC from 40 g/l NaCl electrolyte. The generation rate of AC from Dead Sea brine was significantly higher than that from the NaCl electrolyte; it increased by 95% after 20 min electrolysis. The decrease in the AC generation rate and increase in the rate of electricity consumed with time occurred due to the accumulation of deposits on the electrodes. Circulating the brine with high velocity through the electrolytic cell alleviated electrode deposits. The optimum process parameters namely anode current density and ratio of electrolyte volume to cell volume were found to be 1200A/m(2) and 10-15, respectively. The presence of Ca++ and Mg++ in Dead Sea brine increased the disinfection efficiency of the generated AC in comparison to the disinfection efficiency of AC generated from the NaCl electrolyte.