scholarly journals Colloid clogging of saturated porous media under varying ionic strength and roughness during managed aquifer recharge

2019 ◽  
Vol 9 (3) ◽  
pp. 225-231 ◽  
Author(s):  
Du Xinqiang ◽  
Song Yalin ◽  
Ye Xueyan ◽  
Luo Ran
Keyword(s):  
Porous Medium ◽  
Porous Media ◽  
Ionic Strength ◽  
Smooth Surface ◽  
Saturated Porous Medium ◽  
Managed Aquifer Recharge ◽  
Permeability Reduction ◽  
Saturated Porous Media ◽  
Aquifer Recharge ◽  
Pore Throat

Abstract Column experiments were conducted to examine the clogging effects of colloids under controlled conditions of solution ionic strength (IS) and porous media roughness. The results showed that colloids in recharge water play an important role in the clogging process of saturated porous media, such that even a small amount of colloid may cause a large reduction in the permeability of the porous medium. Clogging at the pore throat was inferred to be the main reason for the severe permeability reduction of porous media. The characteristics of colloid clogging were clearly influenced by both IS and medium roughness. Recharge water with a higher IS facilitated greater attachment of colloids to the surface of the saturated porous medium, which lead to superficial clogging, while collectors with a rough surface resulted in greater clogging than collectors with a smooth surface.

scholarly journals Transient Fluid Motions in Saturated Porous Media

1957 ◽  
Vol 10 (1) ◽  
pp. 43 ◽  
Author(s):  
JR Philip
Keyword(s):  
Porous Medium ◽  
Porous Media ◽  
Heat Conduction ◽  
Exact Solutions ◽  
Kinematic Viscosity ◽  
Saturated Porous Medium ◽  
Steady Motion ◽  
Potential Gradient ◽  
Saturated Porous Media ◽  
Approximate Analysis

The transition from rest to steady motion on the sudden application of a potential gradient to the fluid contained in a saturated porous medium is investigated. An approximate analysis gives the result that the time of the effective establishment of the steady motion is proportional to the permeability and inversely proportional to the kinematic viscosity. Two exact solutions (one of them new) for simple cases suggest that the approximate analysis is remarkably accurate. An analogy between this problem and one in heat conduction makes the relevant results in that field immediately applicable here.

Transport of Escherichia coli phage through saturated porous media considering managed aquifer recharge

2017 ◽  
Vol 25 (7) ◽  
pp. 6497-6513 ◽  
Author(s):  
Wenjing Zhang ◽  
Shuo Li ◽  
Shuang Wang ◽  
Liancheng Lei ◽  
Xipeng Yu ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Porous Media ◽  
Managed Aquifer Recharge ◽  
Saturated Porous Media ◽  
Aquifer Recharge ◽  
Escherichia Coli Phage

Effects of colloidal humic acid on the transport of sulfa antibiotics through a saturated porous medium under different hydrochemical conditions

2018 ◽  
Vol 18 (6) ◽  
pp. 2199-2207 ◽  
Author(s):  
Xiujuan Liang ◽  
Dan Liu ◽  
Jingjing Zhou ◽  
Yuling Zhang ◽  
Wenjing Zhang
Keyword(s):  
Particle Size ◽  
Porous Medium ◽  
Porous Media ◽  
Humic Acid ◽  
Ionic Strength ◽  
Divalent Cation ◽  
Saturated Porous Medium ◽  
Column Experiments ◽  
Breakthrough Concentration ◽  
Hydrochemical Conditions

Abstract Colloidal humic acid (HA) acts as a vector that can facilitate the transport of contaminants in groundwater. However, investigations of factors that enhance the transport of sulfa antibiotics when there are colloids present remain incomplete to date. In this study, column experiments were performed under different conditions (particle size, pH, ionic strength, cation valence, colloidal concentration) using 0.25 mg/L sulfamerazine (SM) with or without colloids. The results showed that antibiotics were more easily deposited on the surface of porous media with a diameter of 0.22 mm than 0.45 mm. As the pH increased from 6 to 8, adding colloidal HA increased the maximum breakthrough concentration from 0.94 to 1 for SM. Adding colloidal HA at different NaCl concentrations decreased the maximum C/C0 ratio from 0.97 to 0.92. However, adding colloidal HA changed the C/C0 ratio more when the divalent cation (Ca2+) was present. Overall, increasing the colloidal HA concentration clearly caused the effluent sulfamerazine concentration to increase.

Importance of Al/Fe oxyhydroxide coating and ionic strength in perfluorooctanoic acid (PFOA) transport in saturated porous media

2020 ◽  
Vol 175 ◽  
pp. 115685 ◽  
Author(s):  
Xueyan Lyu ◽  
Xing Liu ◽  
Xiaoli Wu ◽  
Yuanyuan Sun ◽  
Bin Gao ◽  
...  
Keyword(s):  
Porous Media ◽  
Ionic Strength ◽  
Perfluorooctanoic Acid ◽  
Saturated Porous Media

Column experiments to investigate transport of colloidal humic acid through porous media during managed aquifer recharge

2016 ◽  
Vol 25 (1) ◽  
pp. 79-89 ◽  
Author(s):  
Dan Liu ◽  
Jingjing Zhou ◽  
Wenjing Zhang ◽  
Ying Huan ◽  
Xipeng Yu ◽  
...  
Keyword(s):  
Porous Media ◽  
Humic Acid ◽  
Managed Aquifer Recharge ◽  
Column Experiments ◽  
Aquifer Recharge

Co-transport of U(VI) and akaganéite colloids in water-saturated porous media: Role of U(VI) concentration, pH and ionic strength

2018 ◽  
Vol 147 ◽  
pp. 350-361 ◽  
Author(s):  
Mengtuan Ge ◽  
Dengjun Wang ◽  
Junwei Yang ◽  
Qiang Jin ◽  
Zongyuan Chen ◽  
...  
Keyword(s):  
Porous Media ◽  
Ionic Strength ◽  
Saturated Porous Media ◽  
Water Saturated
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