Experimental investigation of acoustically enhanced colloid transport in water-saturated packed columns
Experimental investigation of acoustically enhanced colloid transport in water-saturated packed columns
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DOI：
10.1016/j.jcis.2006.12.062
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发表时间：
2007-04-01
影响因子：
9.9
通讯作者：
Chrysikopoulos, Constantinos V.
中科院分区：
文献类型：
--
作者：
Thomas, J. Matthew;Chrysikopoulos, Constantinos V.
通过将保守示踪剂尿氨酸以及蓝色和红色聚苯乙烯微球(胶体直径分别为0.10和0.028µm)分别注入填充玻璃微珠的色谱柱中，研究了声波传播对饱和多孔介质中胶体迁移的影响。实验是通过将进水处的声压保持在23.0kPa时进行的，声频从30到150赫兹。实验结果表明，胶体大小不影响正向和反向附着率系数。声压使两种尺寸的保守示踪剂和胶体在所有频率下的有效间质速度都增加，在30赫兹时最大。此外，声学在所有频率都加强了弥散过程，在30赫兹时最大。(C)2007 Elsevier Inc.保留所有权利。
The effects of acoustic wave propagation on the transport of colloids in saturated porous media were investigated by injecting Uranine (conservative tracer) as well as blue and red polystyrene microspheres (colloids of different diameters; 0.10 and 0.028 mu m, respectively) into a column packed with glass beads. Experiments were conducted by maintaining the acoustic pressure at the influent at 23.0 kPa with acoustic frequencies ranging from 30 to 150 Hz. The experimental results suggested that colloid size did not affect the forward and reverse attachment rate coefficients. The acoustic pressure caused an increase in the effective interstitial velocity at all frequencies for the conservative tracer and colloids of both sizes, with maximum increase at 30 Hz. Furthermore, acoustics enhanced the dispersion process at all frequencies, with a maximum at 30 Hz. (c) 2007 Elsevier Inc. All rights reserved.