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.
[1] SAIERS J E，HORNBERGER G M. The role of colloidal kaolinite in the transport of cesium through laboratory sand columns[J]. Water Resources Research，1996，32(1)：33–41.
[2] GROLIMUND D，ELIMELECH M，BORKOVEC M，et al. Transport of in situ mobilized colloidal particles in packed soil columns[J]. Environmental Science and Technology，1998，32(22)：3 562–3 569.
[3] UTSUNOMIYA S，KERSTING A B，EWING R C. Groundwater nanoparticles in the far-field at the Nevada test site：mechanism for radionuclide transport[J]. Environmental Science and Technology，2009，43(5)：1 293–1 298.
[4] MÖRI A，ALEXANDER W R，GECKEIS H，et al. The colloid and radionuclide retardation experiment at the Grimsel test site：influence of bentonite colloids on radionuclide migration in a fractured rock[J]. Colloids and Surfaces A：Physicochemical and Engineering Aspects，2003，217(1/2/3)：33–47.
[5] NATARAJAN N，KUMAR G S. Spatial moment analysis of colloid facilitated radionuclide transport in a coupled fracture-matrix system[J]. International Journal of Energy and Environment，2011，2(3)：491–504.
[6] MASSEI N，LACROIX M，WANG H Q，et al. Transport of particulate material and dissolved tracer in a highly permeable porous medium：comparison of the transfer parameters[J]. Journal of Contaminant Hydrology，2002，57(1/2)：21–39.
[7] AHFIR N D，WANG H Q，BENAMAR A，et al. Transport and deposition of suspended particles in saturated porous media：hydrodynamic effect[J]. Hydrogeology Journal，2007，15(4)：659–668.
[8] OCHIAI N，DRAGILA M I，PARKER J L. Three-Dimensional tracking of colloids at the pore scale using epifluorescence microscopy[J]. Vadose Zone Journal，2010，9(3)：576–587.
[9] FREY J M，SCHMITZ P，DUFRECHE J，et al. Particle deposition in porous media：analysis of hydrodynamic and weak inertial effect[J]. Transport in porous media，1999，37(1)：25–54.
[10] AHFIR N D，BENAMAR A，ALEM A，et al. Influence of internal structure and medium length on transport and deposition of suspended particles：a laboratory study[J]. Transport in Porous Media，2009，76(2)：289–307.
[11] LI X Q，LIN C L，MILLER J D，et al. Role of grain-to grain contacts on profiles of retained colloids in porous media in the presence of an energy barrier to deposition[J]. Environmental Science and Technology，2006，40(12)：3 769–3 774.
[12] KELLER A A，AUSET M. A review of visualization techniques of biocolloid transport processes at the pore scale under saturated and unsaturated conditions[J]. Advances in Water Resources，2007，30(6/7)：1 392–1 407.
[13] BRADFORD S A，YATES S R，BETTAHAR M，et al. Physical factors affecting the transport and fate of colloids in saturated porous media[J]. Water Resources Research，2002，38(12)：1 327–1 338.
[14] XU S P，GAO B，SAIERS J E. Straining of colloidal particles in saturated porous media[J]. Water Resources Research，2006，42：W12S16. doi：1029/2006WR004948.
[15] PORUBCAN A A，XU S P. Colloid straining within saturated heterogeneous porous media[J]. Water Resources Research，2011，45(4)：1 796–1 806.
[16] BRADFORD S A，TORKZABAN S，WALKER S L. Coupling of physical and chemical mechanisms of colloid straining in saturated porous media[J]. Water Research，2007，41(13)：3 012–3 024.
[17] TORKZABAN S，BRADFORD S A，WALKER S L. Colloid transport in unsaturated porous media：The role of water content and ionic strength on particle straining[J]. Journal of Contaminant Hydrology，96(1/2/3/4)：113–127.
[18] PFANNKUCHE J，SCHMIDT A. Determination of suspended particulate matter concentration from turbidity measurements：particle size effects and calibration procedures[J]. Hydrological Processes，2003，17(10)：1 951–1 963.
[19] 薛元忠，何 青，王元叶. OBS浊度计测量泥沙浓度的方法与实践研究[J]. 泥沙研究，2004，(4)：56–60.(XUE Yuanzhong，HE Qing，WANG Yuanye. The method and application OBS in the measurement of sediment concentration[J]. Journal of Sediment Research，2004，(4)：56–60.(in Chinese))
[20] JASTRAM J D，ZIPPER C E，ZELAZNY L W，et al. Increasing precision of turbidity-based suspended sediment concentration and load estimates[J]. Journal of Environmental Quality，2010，39(4)：1 306–1 316.
[21] MURILLO J M. Turbidity and suspended solids in the runoff susceptible of use for the artificial recharge of the deep granular aquifer subjacent to the town of San Luis de Potosí(Mexico)[J]. Boletín Geológicoy Minero，2009，120(2)：169–184.
2013, Vol. 32 
