Transport of Cryptosporidium Oocysts in Porous Media: Role of Straining and Physicochemical Filtration
Citations
355 citations
Cites background from "Transport of Cryptosporidium Oocyst..."
...Straining, Size Exclusion, and Transport in Unsaturated Soils When high removal of ENM is observed in soil columns despite high elektrokinetic barriers normally preventing deposition, straining is often suggested, a process that involves physical entrainment of particles independent of solution chemistry (process 8 in Figure 1; Bradford et al., 2005; Bradford et al., 2003; Tufenkji et al., 2004)....
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...…soil columns despite high elektrokinetic barriers normally preventing deposition, straining is often suggested, a process that involves physical entrainment of particles independent of solution chemistry (process 8 in Figure 1; Bradford et al., 2005; Bradford et al., 2003; Tufenkji et al., 2004)....
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...…only below a particle size to average grain diameter ratio of 0.02 (Bradford et al., 2003), it is believed to occur at lower ratios also because of the roughness of soil particles (Tufenkji et al., 2004) or because ENM gain access to the space inside larger soil aggregates (Sagee et al., 2012)....
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..., 2003), it is believed to occur at lower ratios also because of the roughness of soil particles (Tufenkji et al., 2004) or because ENM gain access to the space inside larger soil aggregates (Sagee et al....
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343 citations
Cites background from "Transport of Cryptosporidium Oocyst..."
...Indeed, straining could even be important when the ratio of the particle to median grain diameter was less than 0.002 and if the collector grains were rough and irregular in shape (Tufenkji et al., 2004; Bradford et al., 2002, 2003)....
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...Tufenkji et al. (2004) indicated that a physical removal mechanism, such as straining, which was independent of electrostatic interactions, would play an important role in particle deposition....
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...002 and if the collector grains were rough and irregular in shape (Tufenkji et al., 2004; Bradford et al., 2002, 2003)....
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342 citations
Cites background from "Transport of Cryptosporidium Oocyst..."
...…that the pore structure can play an important role in colloid deposition under unfavorable attachment conditions (Cushing and Lawler, 1998; Bradford et al., 2002, 2003, 2004, 2005, 2006a–d; Li et al., 2004, 2006a, b; Tufenkji et al., 2004; Bradford and Bettahar, 2005, 2006; Foppen et al., 2005)....
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330 citations
320 citations
Cites background from "Transport of Cryptosporidium Oocyst..."
...The limited body of literature on this subject is focused on the filtration behavior of Cryptosporidium parvum [1,21,33,54,65,82,133,134] and Giardia lamblia [65]— two waterborne pathogens of considerable concern [81,143]....
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...parvum transport behavior in columns packed with ultrapure quartz sand indicates that both straining and physicochemical filtration (attachment) affect the removal of oocysts from the pore fluid [134]....
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...In most controlled packed-column experiments where the transport of viruses [5,6,28,68,72], bacteria [35,38,40,46,62,63,103,104,119,120,141] or protozoa [54, 134] has been examined, the observed breakthrough has been comparable to that of a tracer....
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...(5)) has been used extensively to evaluate microbial transport and fate in saturated porous media [2,6,19,24,34,37,79,91,93,100,101,103,104,134,141]....
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...Specifically, the role of solution ionic strength and composition [33,65,133,134], grain size and shape [21,54,82,134], fluid velocity [54], and collector surface heterogeneity [1] has been examined....
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References
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