Experimental investigation of suspended particles transport through porous media: particle and grain size effect

Environmental Technology
Quansheng LiuShibing Huang

Abstract

Particle and grain size may influence the transportation and deposition characteristics of particles within pollutant transport and within granular filters that are typically used in wastewater treatment. We conducted two-dimensional sandbox experiments using quartz powder as the particles and quartz sand as the porous medium to study the response of transportation and deposition formation to changes in particle diameter (ds, with median diameter 18, 41, and 82 μm) and grain diameter (dp, with median diameter 0.36, 1.25, and 2.82 mm) considering a wide range of diameter ratios (ds/dp) from 0.0064 to 0.228. Particles were suspended in deionized water, and quartz sand was used as the porous medium, which was meticulously cleaned to minimize any physicochemical and impurities effects that could result in indeterminate results. After the experiments, the particle concentration of the effluent and particle mass per gram of dry sands were measured to explore changes in transportation and deposition characteristics under different conditions. In addition, a micro-analysis was conducted to better analyse the results on a mesoscopic scale. The experimental observation analyses indicate that different diameter ratios (ds/dp) may lead to ...Continue Reading

References

Jun 6, 2003·Environmental Science & Technology·Scott A BradfordScott R Yates
Jan 31, 2004·Environmental Science & Technology·Nathalie Tufenkji, Menachem Elimelech
Feb 3, 2005·Journal of Contaminant Hydrology·J W A FoppenJ F Schijven
Mar 11, 2005·Journal of Environmental Quality·S A Bradford, M Bettahar
May 21, 2009·Environmental Science and Pollution Research International·Jaime DíazMario Díaz
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Dec 1, 1995·Environmental Science & Technology·D LiuM Elimelech

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