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:4/17/2014)... recent Yokahama IPCC meeting painted a stark warning on ... which has a greenhouse effect 32 times that of ... shown that humic substances act as fully regenerable electron ... are held in wetlands instead of being released to ... system is disrupted it may enter into a vicious ...
(Date:4/17/2014)... the genetic information of DNA is used to ... numerous different functions in living organisms. Messenger RNA ... expression, by relating the genetic information of DNA ... , By examining the different types and ... at a given time, researchers can determine which ...
(Date:4/17/2014)... uncovered a new way the immune system may fight ... to use immune cells to treat illness. , The ... immunological equivalent of "neighborhood police" specialized squads of ... instead of an entire city, the body. , Scientists ... have shown that the liver, skin and uterus each ...
Breaking Biology News(10 mins):Methane climate change risk suggested by proof of redox cycling of humic substances 2Rapid and accurate mRNA detection in plant tissues 2Some immune cells defend only 1 organ 2
... presented the 2013 Gustav O. Lienhard Award to Steven ... have helped save millions from premature, smoking-related deaths. ... as well as his work to improve end-of-life care. ... award to a dedicated champion of health for Americans ...
... -- Carnegie Mellon University President Subra Suresh has been ... making him the only current university president to be ... National Academy is among the highest professional distinctions accorded ... membership honors those who have made outstanding contributions to ...
... WASHINGTON -- The Institute of Medicine of the National Academies ... Clayton for their outstanding service today at the IOM,s 43rd ... Medal, awarded to an IOM member for distinguished service over ... on the Quality of Health Care in America, which produced ...
Cached Biology News:Leader of smoking cessation and tobacco prevention efforts receives Institute of Medicine's 2013 Lienhard Award 2Leader of smoking cessation and tobacco prevention efforts receives Institute of Medicine's 2013 Lienhard Award 3Leader of smoking cessation and tobacco prevention efforts receives Institute of Medicine's 2013 Lienhard Award 4Carnegie Mellon President Subra Suresh elected to Institute of Medicine 2Institute of Medicine honors members for outstanding service 2Institute of Medicine honors members for outstanding service 3
(Date:1/15/2014)... Toronto, ON (PRWEB) January 15, 2014 ... an experimental new therapy for the treatment of tinnitus. ... unique tinnitus frequency, and over a period of weeks to ... Notched Sound Therapy in two forms: Notched Music and Notched ...
(Date:1/14/2014)... January 14, 2014 Date: Friday, April 11, ... Warrington Country Club, 1360 Almshouse Road, Warrington, Pa. ... organization solely dedicated to finding a cure for hepatitis B ... will host its annual Crystal Ball on Friday, April 11 ...
(Date:1/14/2014)... San Diego, CA (PRWEB) January 14, 2014 ... based on the products of cells grown under simulated ... an international license agreement with Suneva Medical, Inc. for ... media (CCM). , This agreement is an ...
(Date:1/14/2014)... , Jan. 14, 2014 As pet owners drew up their ... of them wrote: "Take better care of my furry companion." Nowadays ... clothes and top-brand carrying cases to take the little canine or ... also feel compelled to buy some pricey toys at the pet ...
Breaking Biology Technology:Hepatitis B Foundation to Host Annual Crystal Ball Gala 2Histogen and Suneva Medical Expand License for Cell Conditioned Media-based Aesthetic Products Internationally 2Histogen and Suneva Medical Expand License for Cell Conditioned Media-based Aesthetic Products Internationally 3New Year's Resolution: Give Pets the Gift of Top-Notch Health Care 2
... SAN DIEGO, April 9, 2012 ADVENTRX Pharmaceuticals, Inc. ... establishment of a Regulatory Advisory Board (RAB). The RAB ... Company management in its interactions with the U.S. Food ... JD, who is rendering legal advice to Company management, ...
... wholly owned subsidiary of British company Innovative Carbon Limited today ... 10th April to 13th. , Graphene, a sheet of carbon ... wonder material. First isolated at Manchester University in 2004, ... race has been on to produce it commercially. To ...
... 2012  Albright Stonebridge Group (ASG), a global strategy ... senior advisors – Hakan Akbas, Steven Bipes, Brian ... leading ASG,s commercial activities and advising clients on ... clients of ASG,s Brazil practice as they look ...
Cached Biology Technology:ADVENTRX Announces Establishment of Regulatory Advisory Board 2ADVENTRX Announces Establishment of Regulatory Advisory Board 3ADVENTRX Announces Establishment of Regulatory Advisory Board 4ADVENTRX Announces Establishment of Regulatory Advisory Board 5ADVENTRX Announces Establishment of Regulatory Advisory Board 6UK company to demonstrate their commercially effective graphene production process 2Experts Strengthen Albright Stonebridge Group's Global Reach 2Experts Strengthen Albright Stonebridge Group's Global Reach 3
... Development, Pharmaceutical Development, Physician Owned Labs, Drugs of Abuse, and Industrial Testing applications. Analyzer ... ... ... ...
... OS X provides the most highly integrated ... analysis and molecular biology data management available ... Suite you can store manage view analyze ... molecular biology data all within one integrated ...
... determinations for petroleum-based applications. Multiple solvents can be used, such as water, benzene, formamide, nitrobenzene, ... ... ... ...
rat Leptin...
Biology Products: