HOME >> BIOLOGY >> NEWS
Protecting drinking water from disease transmission by means of zeolite filters

WASHINGTON - Septic tanks, sewage overflow, and landfills can contaminate drinking water supplies with germs responsible for human infections, including hepatitis viruses and E. coli bacteria. The development of an inexpensive means for blocking the transmission of bacteria and viruses to humans could significantly reduce disease outbreaks associated with groundwater and could also alleviate concerns regarding bioterrorist threats to drinking water supplies.

A team of scientists headed by Dirk Schulze-Makuch of the University of Texas at El Paso has experimented with the removal of viruses from drinking water using a filter made of naturally occurring minerals known as zeolites. Their findings are presented in the April 30 issue of Eos, a publication of the American Geophysical Union.

In typical ground water, viruses carry a negative surface charge. Adding a filter that carries a positive charge to wells will cause the viruses to adhere to the filter, rather than being transmitted to humans who drink the water.

Schulze-Makuch and his colleagues suggest, based on their experiments, that zeolites would be effective filter components to block virus migration in ground water. Like clay minerals, zeolites have a large surface area, providing more places for viruses to adhere. Unlike clays, however, zeolites do not swell in water but remain rigid, serving as a filter through which water can pass freely.

Zeolites possess a negative surface charge, which limits their natural ability to attract viruses. In order to reverse this charge, the scientists treated zeolites with a chemical, abbreviated HDTMA (hexadecyltrimethylammonium), which is found in hair conditioner and mouthwash. They then conducted laboratory and field studies to compare the performance of treated zeolite as a suitable virus barrier with that of untreated zeolite and of iron-oxide coated sand.

The researchers found that in both laboratory and field tests, untreated
'"/>

Contact: Harvey Leifert
hleifert@agu.org
202-777-7507
American Geophysical Union
26-Apr-2002


Page: 1 2

Related biology news :

1. Protecting vessel loss in the eyes of premature infants
2. Protecting waterbirds from watercraft
3. Protecting the rice bowl: Chromosomal mapping of the rice blast fungus
4. Tiny Molecular Channels Key To Protecting Heart During Attack
5. Protecting the Beat Of Life: Test Center Studies Interaction Between Pacemakers & Electronic Article Surveillance Systems
6. $6 million appropriation to focus Sandia research on drinking water desalination, removal of arsenic
7. Gene therapy reduces drinking in rats with genetic predisposition to alcoholism
8. Arsenic in drinking water may be linked to cancer Dartmouth study finds
9. Underwater sensor system could protect reservoirs, drinking water
10. New study ties moderate beer drinking to lower heart attack risk
11. Binge drinking among Jewish and non-Jewish college students

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:7/18/2020)... ... July 16, 2020 , ... A study has been published ... Neoasis™ active noise control device to attenuate typical noises in a simulated neonatal ... the alarm sounds from patient monitors, ventilators and other bedside devices that would ...
(Date:7/4/2020)... ... July 03, 2020 , ... ... earn outstanding recognition and multiple awards for not only the products and treatments ... SoME® Skincare and Vivace® Microneedle RF. All the brands built by ABM have ...
(Date:7/1/2020)... ... July 01, 2020 , ... ... and solutions for glioblastoma—the most common and aggressive adult brain cancer—announced today the ... PhD. Senior Fellows are charged with supporting the organization’s initiatives and overall vision. ...
Breaking Biology News(10 mins):
(Date:6/28/2020)... ... June 25, 2020 , ... The Indoor Lab, a leading provider of sensor ... of all types to ensure cleanliness, distancing and occupancy with its patent pending WipeAway™ ... enabled business will provide a health performance index system that scores all aspects of ...
(Date:6/28/2020)... ... June 25, 2020 , ... ... therapy for treating cancer, today announced the company has entered a license agreement ... The agreement provides Lumeda globally exclusive rights to Roswell Park intellectual property surrounding ...
(Date:6/23/2020)... ... June 23, 2020 , ... Kerafast Inc. , ... today announced the availability of the Delta-G-VSV Pseudotyping System for coronavirus research applications. ... studies of SARS-CoV-2 viral entry and COVID-19 vaccine effectiveness at just biosafety level ...
(Date:6/23/2020)... ... 2020 , ... Regen Suppliers, the one stop shop for ... get the fourth unit free with no limit on the amniotic derived exosomes. ... have been a game changer for regenerative therapies. The products are manufactured at ...
Breaking Biology Technology:
Cached News: