Separation of nano-sized colloidal particles using cross-flow electro-filtration
Separation of nano-sized colloidal particles using cross-flow electro-filtration
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DOI：
10.1016/j.seppur.2007.07.035
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发表时间：
2007-12
影响因子：
8.6
通讯作者：
Yao-Tung Lin;M. Sung;P. Sanders;Andrew C. Marinucci;C. Huang
中科院分区：
文献类型：
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作者：
Yao-Tung Lin;M. Sung;P. Sanders;Andrew C. Marinucci;C. Huang
设计了一种新型的电错流过滤系统（ECFF），并将其用于改善纳米颗粒的分离。模型胶体，例如，γ-Al 2 O3和SiO2，以及从新泽西州的沃茨中收集的天然存在的胶体颗粒被用于评估ECFF模块的性能。结果表明，在本研究的实验条件下，原型ECFF单元功能正常，没有堵塞，也没有必要对膜进行清洗。通过调节静电场强度，可以有效地分离纳米级胶体颗粒。去除效率随外加电场强度的增加而增加。一个简化的传输模型被用来评估相关参数，如表面电荷，过滤速率，和施加的电场强度，对过滤器的性能的影响。模型结果与实验结果吻合较好。
A prototype electrical cross-flow filtration system (ECFF) was designed and used to improve the separation of nano-sized particles from water. Model colloids, e.g., γ-Al2O3and SiO2, and naturally occurring colloidal particles collected from well waters in the state of New Jersey were used to evaluate the performance of the ECFF module. Results indicated that the prototype ECFF unit functions properly without clogging and there is no need to backwash the membrane, under the experimental conditions of this study. It is possible to effectively separate the nano-sized colloidal particles by adjusting the electrostatic field strength. The removal efficiency increased with the applied electrostatic field strength. A simplified transport model was utilized to assess the effect of pertinent parameters, such as surface charge, filtration rate, and applied electric field strength, on the performance of the filter. The model results agreed well with those obtained experimentally.