HOME >> BIOLOGY >> NEWS
Using soils as filters to prevent 'crypto' from moving to the groundwater

MADISON, WI, FEBRUARY 27, 2004 Groundwater is generally considered a safe source of drinking water because pathogens are presumably filtered out during their transport through unsaturated soils. Nevertheless, pathogen-contaminated groundwater has been the cause of many disease outbreaks in the last 10 years including cryptosporidiosis caused by the protozoan pathogen Cryptosporidium parvum. Standard chlorine disinfection is not effective at killing the pathogen.

Although several "crypto" outbreaks have occurred in the U.S., the most severe problem is in Africa where both the sanitary conditions are poor and a significant portion of the population has HIV. It is especially dangerous for people with a compromised immune system because it can lead to severe diarrhea and lethal dehydration. the most notable being a cholera epidemic in London in 1854.

A study published in the February 2004 issue of Vadose Zone Journal, which was funded by the USDA-National Research Initiative program and performed at Cornell University Department of Biological and Environmental Engineering, examines how C. parvum oocysts may be transported via preferential flow to groundwater.

A simulation model was developed on the basis of an existing preferential flow model. Column experiments with sandy and undisturbed structured soils were performed. Calf manure with cryptosporidiosis was applied to the columns soil surface, followed by rain. Chloride was also added as a tracer.

"Traditionally, people assume that soils filter out pathogens. This is based upon the premise that water and pathogens move slowly through all of the soil. We found that for sandy soil, where water moved rapidly through, there was indeed very little filtering initially. Surprisingly, the undisturbed, structured columns with large macropores had only a very limited breakthrough," said Tammo Steenhuis, Cornell University, who was one of the researchers of the study.

Although this study
'"/>

Contact: Sara Uttech
suttech@agronomy.org
608-273-8080
American Society of Agronomy
27-Feb-2004


Page: 1 2

Related biology news :

1. Using statistics to decipher secrets of natural mutation
2. Using science to restore habitat for declining species
3. Using a companion crop to control weeds organically
4. Using plants and microbes to purify polluted industrial wastewater
5. Using GPR to estimate tree root biomass
6. Using computational power tools to bolster systems biology
7. Using RNA interference to tune gene activity in stem cells
8. Using sewage sludge as fertilizer
9. Using the oceans living light shows to fight terrorism or track the planets most massive migration
10. Using genetic research to treat inflammatory diseases Vienna centre of excellence in biomedicine harnesses basic research
11. Using brain activity to identify risk for disorders

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Using soils filters prevent crypto from moving the groundwater

(Date:11/3/2014)... from Australia report that low birth weight and preterm ... hip replacements in adulthood. Findings published in the American ... Research , indicate that low birth weight and pre-term ... due to OA as adults. , According to ... 25 are diagnosed with clinical OA. Symptoms of OA ...
(Date:11/2/2014)... (2 November 2014)—In support of a bold quest to ... Melinda Gates Foundation today announced an award of US$156 ... Initiative (MVI) in building new vaccines that will interrupt ... the "accelerating to zero" agenda. Such vaccines would ensure ... be called an "immunological bed net." , This ...
(Date:11/2/2014)... a bar and bump into a biologist . . . ... late-night nerd sketch, researchers have taken this premise and applied ... finding meaning in the rising oceans of genomic data. , ... that genome-wide studies are publishing at a dizzying rate. The ... signal from the noise (and there is no shortage of ...
Breaking Biology News(10 mins):Preterm, low birth-weight babies may need new hips in adulthood 2New malaria vaccines to prevent infection and block transmission get a shot in the arm 2New malaria vaccines to prevent infection and block transmission get a shot in the arm 3New malaria vaccines to prevent infection and block transmission get a shot in the arm 4Mutant models 2Mutant models 3Mutant models 4
(Date:11/27/2014)... Massachusetts, USA (PRWEB) November 26, 2014 ... more accuracy, additive systems to enable 3D manufacture at ... analyzing road conditions are among finalists in nine categories ... . The awards are sponsored by SPIE, the ... Photonics Media . , Winners will be announced by ...
(Date:11/26/2014)... In keeping with the holiday spirit, DNA ... Thanksgiving savings. The company is offering up a variety ... this holiday weekend as well as a photo contest ... Monday are right around the corner, and DNA Spectrum ... and those looking to explore their ancestry, health, and ...
(Date:11/26/2014)... 2014 The ETC (Emerging Technology ... innovation centers, announced today that applications for AccelerateBaltimore™ ... 1st. “Do you have a big idea?,” asked ... to know about it. AccelerateBaltimore helps you and ... in just 13 weeks.” Interested game changers ...
(Date:11/26/2014)... 2014 Continuing its award-winning streak, Nerium ... prestigious MarCom Awards for outstanding creative achievement by its ... MarCom Award, the organization’s top honor, in the Branding ... held in April of this year. The event showcased ... Additionally, Nerium was awarded a Gold MarCom Award in ...
Breaking Biology Technology:Finalists Named for 2015 Prism Awards for Photonics Innovation 2Finalists Named for 2015 Prism Awards for Photonics Innovation 3Finalists Named for 2015 Prism Awards for Photonics Innovation 4Finalists Named for 2015 Prism Awards for Photonics Innovation 5DNA Spectrum Offers Last Minute Thanksgiving Coupons 2DNA Spectrum Offers Last Minute Thanksgiving Coupons 3AccelerateBaltimore Applications to Close in 6 Days 2AccelerateBaltimore Applications to Close in 6 Days 3Nerium International™ Wins One Platinum, Two Gold MarCom Awards 2
Cached News: