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:


(Date:2/13/2019)... ... February 13, 2019 , ... MMJ International Holdings, the ... through patient clinical trials and research, announced that it is seeking fast track ... to help expedite the review and approval of drugs in development that treat ...
(Date:2/11/2019)... ... February 11, 2019 , ... Allotrope Foundation announces ... phased release of the Allotrope™ Framework for standardizing scientific data and its context. ... Allotrope™ Data Format (ADF) and application programming interfaces (APIs), and the Allotrope Foundation© ...
(Date:2/2/2019)... ... 31, 2019 , ... Through its Microbiome Grant Initiative ... study design, planning, sample collection, and analysis to researchers at Stanford University led ... Sara Vaughn, MD, Reproductive Endocrinology and Infertility Fellow, to study the role of ...
Breaking Biology News(10 mins):
(Date:1/30/2019)... ... January 29, 2019 , ... ... is frustrated over something like a tricky math problem on an online tutoring ... by Worcester Polytechnic Institute (WPI) computer science assistant professor Erin Solovey ...
(Date:1/24/2019)... ... January 22, 2019 , ... Controlled Contamination Services is pleased to announce three ... of these valuable new team members will support its growing operation across the US ... CCS scales its business. This addition will enable CCS to widen its reach and ...
(Date:1/20/2019)... (PRWEB) , ... January 16, 2019 , ... On January ... an invited news article by Asymmetrex director James L. Sherley, M.D., Ph.D. ... cell therapy resources like the PGCB and CellTrials.org. Now in its 21st year ...
(Date:1/15/2019)... ... January 15, 2019 , ... Personalized treatment plans may extend life expectancy ... to a new study published in the journal Radiology. , Kidney, or renal, ... nephrectomy, a surgical procedure in which the tumor and part of the kidney are ...
Breaking Biology Technology:
Cached News: