Virus removal by soil passage at field scale and groundwater protection of sandy aquifers

2002 ◽  
Vol 46 (6-7) ◽  
pp. 411-411 ◽  
Author(s):  
J.F. Schijven ◽  
S.M. Hassanizadeh
Keyword(s):  
Groundwater Protection ◽  
Field Scale ◽  
Virus Removal ◽  
Sandy Aquifers

Virus removal by soil passage at field scale and ground-water protection of sandy aquifers

2002 ◽  
Vol 46 (3) ◽  
pp. 123-129 ◽  
Author(s):  
J.F. Schijven ◽  
S.M. Hassanizadeh
Keyword(s):  
Rate Coefficient ◽  
Removal Rate ◽  
Virus Concentration ◽  
Current Guideline ◽  
Rate Parameter ◽  
Worst Case ◽  
Virus Removal ◽  
Virus Contamination ◽  
Time Required ◽  
Sandy Aquifers

Virus removal from groundwater by soil passage often appears to be much higher during the first few metres due to the presence of more favorable sites for attachment than thereafter. A model is presented which interprets virus removal as a function of collision efficiencies αbeta; and αλl, inactivation rate coefficient μll and rate parameter γ. Initial high removal is determined by αβ, which decreases exponentially at a rate γ to a constant base removal rate that is determined by αλ and μl. A hypothetical worst case was simulated to calculate the travel distance and time required for 9 log10 protection against virus contamination of groundwater wells in anoxic sandy aquifers. Unfavorable conditions for attachment were assumed. Virus was constantly leaking from a sewage pipe lying at the groundwater table. Mixing reduced virus concentration by 3.1 to 4.0 log10. For an additional 5.0 to 5.9 log10 protection against virus contamination by attachment and inactivation, residence times of about three to seven times longer than the current guideline of 60 days are needed, depending on abstraction rates, aquifer thickness and grain size of the sand.

Pesticides and Groundwater Protection

1992 ◽  
Vol 21 (1) ◽  
pp. 107-108 ◽  
Author(s):  
John Postlewaite
Keyword(s):  
Groundwater Protection

Virus Removal by Filtration

1982 ◽  
Vol 14 (4-5) ◽  
pp. 253-256
Author(s):  
N Sriramula ◽  
M Chaudhuri
Keyword(s):  
Experimental Data ◽  
Escherichia Coli ◽  
Cationic Polyelectrolyte ◽  
Electrokinetic Phenomena ◽  
Virus Removal ◽  
Bacterial Virus ◽  
Gravity Settling ◽  
And Diffusion ◽  
Model Virus ◽  
Good Agreement

An investigation was undertaken on the removal of a model virus, bacterial virus MS2 against Escherichia coli, by sand filtration using untreated, and alum or cationic polyelectrolyte treated media, and uncoagulated as well as alum coagulated influent. Data on discrete virus removal were satisfactorily accounted for by electrokinetic phenomena and diffusion. For virus in association with turbidity, filter coefficients computed from experimental data were in good agreement with those predicted by mechanical straining and gravity settling which were the dominant mechanisms for removal of the turbidity particles to which the viruses attached.

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