摘要
文章为了解决淡水资源短缺这一严峻的问题,考虑将能耗小、无化学再生等优点的膜电容去离子技术作为基础,对其进行改进与优化,即将低电阻、高比表面积和高孔隙率的泡沫镍替代传统集流体。并利用改进后的装置进行实验,分别探讨电极材料、电压和盐水流速等因素对脱盐效率的影响。将未加电极材料和加3种不同的活性炭作为电极材料的装置进行脱盐实验,根据结果得出,在脱盐过程中起主要作用的仍然是电吸附过程,通过进一步对电极材料进行表征,讨论得出脱盐效率与比表面积和孔径分布均有关系。随后在最优电极材料的条件下,讨论得出最优的操作条件,即在施加电压为1.6V、盐水流速为10mL/min下可以达到最佳的脱盐效率,吸附量为8.9mg/g。且通过长时间的吸脱附实验得出电极材料AC1具有良好的再生能力。
In this study,in order to solve the serious problem of the shortage of fresh water,the membrane capacitive deionization with low energy consumption and no chemical regeneration was used in the desalting test.The traditional current collector was replaced with the nickel foam that is in the low resistance,high ratio surface area and high porosity.The effects of electrode material,voltage and the brackish stream′s flow rate on desalination efficiency were investigated by using the novel device.Desalting experiments were carried out on the device without adding electrode material and adding three different kinds of activated carbon as electrode material.According to the results,the main role in the desalination process was still the electro-adsorption process.Through further characterization of electrode materials,it was concluded that desalination efficiency was related to specific surface area and pore diameter distribution.Under the condition of optimal electrode material,the better operation condition was discussed,which was that the efficiency of desalting was the optimal result of the applied voltage of 1.6 Vand brine velocity of10 mL/min.The SAC was 8.9 mg/g.And AC1 had good regeneration ability through the absorption and removal experiment.
作者
范新飞
沈彤
安金硕
宋成文
FAN Xinfei;SHEN Tong;AN Jinshuo;SONG Chengwen(College of Environmental Science and Engineering,Dalian Maritime University,Dalian 116026,China)
出处
《海洋开发与管理》
2020年第9期91-96,共6页
Ocean Development and Management
基金
国家自然科学基金(21476034)。
关键词
膜电容去离子
海水淡化
泡沫镍
活性炭
脱盐效率
Membrane capacitance deionization
Seawater desalination
Nickel foam
Activated carbon
Desalination efficiency
