Navigation Links
Stanford scientists find new solutions for the arsenic-poisoning crisis in Asia
Date:3/25/2009

tion was occurring near the surface and, in fact, would take at least 100 years to reach the aquifer below. The Stanford team also showed that the 100-year-scale cycling of arsenic into the aquifer was a natural process that had been occurring for thousands of years, preceding any human influence. "We showed that there is a perpetual source of arsenic that replenishes from the surface," Fendorf said.

Solutions to the crisis

Understanding the area's hydrology will allow developers to strategically install wells that draw from areas free of dissolved arsenic, providing clean, drinkable water. Such targeted excavation can be extremely accurate, Fendorf said.

But what if a village needs a well but is unable to find an arsenic-free location to install it? Fendorf has proposed several solutions, including installing arsenic filters, collecting rainwater and purifying surface water. Each option has pros and cons, he said.

Filtering arsenic from well water raises the problem of how to dispose of leftover waste. "There aren't hazardous waste landfill sites," he noted. Additionally, the filter approach requires a dependable monitoring system. "If you do have a failure of the filter, how do you know when it occurs, and how are you going to be testing for that?" he asked.

Harvesting rainwater with collection tanks or rooftop gutters can be effective in certain locations and for certain people, he said. But areas with longer dry seasons require big tanks that are often too expensive. "These are areas where people are making less than $2 a day," Fendorf noted.

Another option is to use a disinfectant to purify surface water collected from ponds or rivers. The problem, he said, is that the filters have to be very cheap and easy to use. To solve the problem, Fendorf has been collaborating with Resource Development International (RDI), a non-governmental organization in Cambodia that makes affordable filters from locally di
'/>"/>

Contact: Mark Shwartz
mshwartz@stanford.edu
650-723-9296
Stanford University
Source:Eurekalert

Page: 1 2 3 4 5 6

Related biology news :

1. Americans remain pessimistic about the environment, Stanford-AP survey finds
2. Stanford/Packard researchers find disease genes hidden in discarded data
3. Stanford researchers say climate change will significantly increase impending bird extinctions
4. Stanfords nanowire battery holds 10 times the charge of existing ones
5. Stanford researchers publish review of US medical device regulation
6. Stanford researchers make first direct observation of 3-D molecule folding in real time
7. Stanford researchers say living corals thousands of years old hold clues to past climate changes
8. Group led by Stanford physicist says theres an urgent need for nuclear detectives
9. Stanford researchers developing 3-D camera with 12,616 lenses
10. Clues to ancestral origin of placenta emerge in Stanford study
11. Inflammation triggers cell fusions that could protect neurons, Stanford research shows
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/29/2014)... open for the Society of Interventional Radiology,s ... is the one place where interventional radiologists, ... care professionals can come together to find ... being presented, discussed and tested. , ... image-guided medicine, SIR 2015 will feature essential ...
(Date:10/29/2014)... and industrial products are in the environment – and ... them, scientists have yet to determine whether they cause ... doing that by estimating which substances people are exposed ... the ACS journal Environmental Science & Technology . ... risks to human health of any given substance depend ...
(Date:10/29/2014)... LANSING, Mich. – As bodies decompose, their types ... the clues they provide could mean the difference ... , Michigan State University is using a more ... help Detroit death-scene investigators examine these changing populations. ... as geographical location of death, gender, race, socioeconomic ...
Breaking Biology News(10 mins):SIR 2015: Interventional radiology shapes tomorrow's medicine 2MSU partners with Detroit to investigate death scenes 2
... of California, San Diego has discovered a molecule in ... or Bt toxin--a pesticide produced by bacteria and widely ... to ward off insect pests. , Their findings should ... prevent insects, which the researchers believe also possess the ...
... scientific world has accepted for more than 100 ... by their grandparents, bypassing genetic abnormalities carried by ... have hidden templates containing genetic information from the ... offspring, even though the traits aren't evident in ...
... to coax mouse stem cells to transform themselves into fat ... naturally do in the body. , While other studies have ... cells never completely functioned in the same way they do ... biologic components that all cells require to do their work. ...
Cached Biology News:UCSD discovery may help extend life of natural pesticide 2UCSD discovery may help extend life of natural pesticide 3Plants defy Mendel's inheritance laws, may prompt textbook changes 2Plants defy Mendel's inheritance laws, may prompt textbook changes 3Tiny scaffolding allows stem cells to become working fat cells 2Tiny scaffolding allows stem cells to become working fat cells 3
(Date:10/31/2014)... October 31, 2014 Jeffrey T. Manuel, ... Historical Studies within the College of Arts and Sciences, ... record the history of alcohol-based fuels in Illinois. ... others have been working to build Illinois’ biofuels industry ... overlooked aspect of the state's agricultural and business history. ...
(Date:10/31/2014)... 2014 ENVIRON , an ... today that Dr. Harvey Clewell III has rejoined ... work closely with senior professionals in ENVIRON’s Health ... serve at The Hamner Institutes for Health Sciences ... where he is Director, Center for Human Health ...
(Date:10/30/2014)... 2014 Investor-Edge has initiated coverage ... ONVO), Medivation Inc. (NASDAQ: MDVN ), Pharmacyclics ... (NYSE MKT: SYN), and Ironwood Pharmaceuticals Inc. (NASDAQ: IRWD). ... at: http://investor-edge.com/register . On Wednesday, October ... 0.33%, the Dow Jones Industrial Average declined 0.18%, to ...
(Date:10/30/2014)... 30, 2014 SoundConnect , ... offers Office 365 end users the key to ... phone system by adding voice enablement and hybrid ... Lync Online, a communication tool that includes presence, ... hosted voice, O365 becomes a comprehensive unified communications ...
Breaking Biology Technology:SIUE History Prof Manuel Working on Biofuels Book with NCERC 2SIUE History Prof Manuel Working on Biofuels Book with NCERC 3Internationally recognized health scientist Dr. Harvey Clewell renews association with ENVIRON 2Internationally recognized health scientist Dr. Harvey Clewell renews association with ENVIRON 3Biotech Equities Movers and Shakers - Organovo Holdings, Medivation, Pharmacyclics, Synthetic Biologics, and Ironwood Pharma 2Biotech Equities Movers and Shakers - Organovo Holdings, Medivation, Pharmacyclics, Synthetic Biologics, and Ironwood Pharma 3Biotech Equities Movers and Shakers - Organovo Holdings, Medivation, Pharmacyclics, Synthetic Biologics, and Ironwood Pharma 4Biotech Equities Movers and Shakers - Organovo Holdings, Medivation, Pharmacyclics, Synthetic Biologics, and Ironwood Pharma 5SoundConnect Launches Voice Enablement and Hybrid Audio Conferencing for Office 365 2SoundConnect Launches Voice Enablement and Hybrid Audio Conferencing for Office 365 3
... Calif., Feb. 4 Arryx, Inc.,announced the addition ... Holographic Optical Trapping ("HOT") product line. The HOTkit,Complete ... events, and now, through the power of light, ... The HOTkit Complete was unveiled February 4 ...
... HORSHAM, Pa., Feb. 4 Centocor, Inc. announced ... (CNTO 1275),has been accepted for review by the ... of adult patients with chronic moderate to severe ... with a novel,mechanism of action that targets the ...
... HAVEN, Conn., Feb. 4 VION,PHARMACEUTICALS, INC. (Nasdaq: ... the Company,s senior management team as Vice President,Medical., ... pleased,to have Bill Hahne joining Vion in medical affairs. ... will be extremely useful to our,efforts to file a ...
Cached Biology Technology:Arryx Launches HOTkit(TM) Complete for Dynamic, Scientific Manipulation of Microscopic Elements 2Arryx Launches HOTkit(TM) Complete for Dynamic, Scientific Manipulation of Microscopic Elements 3Centocor Announces Ustekinumab Biologic License Application Accepted for Filing by FDA 2Centocor Announces Ustekinumab Biologic License Application Accepted for Filing by FDA 3Vion Pharmaceuticals Adds William Hahne, M.D. to Senior Management Team 2Vion Pharmaceuticals Adds William Hahne, M.D. to Senior Management Team 3
...
Tan solid. A glycoside used to permeabilize cellular membranes. Exhibits hemolytic activity. Contaminants: ash: ≤10%. Soluble in H 2 O. pH 4.4 - 4.6. RTECS VQ1400000, CAS 8047-15-2. References:...
...
... utilizes a silica based spin filter membrane to ... desired DNA band is cut from an agarose ... unit. The gel slice is melted irreversibly in ... is bound to the silica spin filter membrane ...
Biology Products: