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Abstract Particle size and flow rate play an important role in particle transportation and deposition in porous media. Different suspended particles were studied under different flow rates in soil columns tests，and the corresponding breakthrough curves were analyzed. The effects of particle shape and chemical factors on test results were excluded from the tests. Test results show that the peak concentration of effluent increases and the quantity of deposition particle decreases with the increasing flow rate for the same particle size. However，the deposition particle decreases with the increasing flow rate. There exists a critical flow rate of 0.173 cm/s，and the effect of flow rate on particle transportation can be negligible when the flow rate is larger than the critical value. On the other hand，the peak concentration of effluent decreases and deposition increases with the increasing particle size for the same flow rate. Furthermore，the effect of particle size on particle straining is obvious at low flow rate.
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Received: 27 December 2011
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2013, Vol. 32 
