Navigation Links
Natural processes can limit spread of arsenic in water, says study
Date:10/11/2011

Many people in Bangladesh and other parts of Asia have been poisoned by drinking groundwater laced with arsenicnot introduced by humans, but leached naturally from sediments, and now being tapped by shallow drinking wells. In recent years, to avoid the problem, deeper wells have been sunk 500 feet or more to purer watersbut fears have remained that when deep water is pumped out, contaminated water might filter down to replace it. Now, a study has shown that deep sediments can grab the arsenic and take it out of circulationa finding that may help to keep wells safe elsewhere, including in the United States. The study, led by researchers at Columbia University's Department of Earth and Environmental Engineering and the Lamont-Doherty Earth Observatory, appears in the current online edition of the journal Nature Geoscience.

Lead author Kathleen Radloff and her colleagues injected arsenic-rich water into a deep aquifer in Bangladesh, then monitored arsenic levels over nine days. They found that arsenic fell by 70 percent after 24 hours, and continued to decline over the monitoring period. They attributed this to the arsenic sticking to the surfaces of deep sediment particles, in a process called adsorption.

However, the process may have limits. The results were applied to a hydrological model of the Bengal Basin, the aquifer that serves most of Bangladesh and the neighboring Indian state of West Bengal. Using the model, the team found that the risk of arsenic contamination is limited when wells are restricted to household use, but increases significantly if they are also used for irrigation, even if much arsenic adsorbs to the sediment.

Elevated arsenic is common in shallow drinking wells across much of South and Southeast Asia, but the problem has been most apparent in Bangladesh. The World Health Organization has called it the largest mass poisoning in history. Researchers from Columbia's Mailman School of Public Health, Lamont-
'/>"/>

Contact: Kevin Krajick
kkrajick@ei.columbia.edu
212-854-9729
The Earth Institute at Columbia University
Source:Eurekalert  

Page: 1 2

Related medicine news :

1. Soy-based natural S-equol supplements improve crows feet skin wrinkles in menopausal women
2. For Kids, Natural Disasters Can Whip Up Worries
3. Bodys natural marijuana-like chemicals make fatty foods hard to resist
4. Study shows pine bark naturally improves heart function
5. Cooling system may build eggs natural defenses against salmonella
6. Natural Alzheimers weapon suggests better treatment
7. Cooling the brain during sleep may be a natural and effective treatment for insomnia
8. Helping the aged during natural disasters
9. Led by advances in chemical synthesis, scientists find natural product shows pain-killing properties
10. Twitter and natural disasters
11. Federal Natural Resource Trustees announce next step in BP Deepwater Horizon spill Gulf restoration
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Natural processes can limit spread of arsenic in water, says study
(Date:4/18/2015)... 2015 “ ArcAngel ” was featured on ... look at the latest and coolest applications on ... host of AppWatch and technology expert, conducted the app review ... app. , In a turbulent world, people may find ... should always be their first move, but some situations can ...
(Date:4/18/2015)... 18, 2015 French physician and gastronome ... choices when he uttered, “Tell me what you eat, ... food to cope with stress or sadness has often ... indicates otherwise. Data collected from their Emotional ... to emotional eating, but for different reasons. , Collecting ...
(Date:4/17/2015)... John Evans, a Gardant affordable assisted living community, ... p.m. to 3 p.m. on April 24. , The ... Pekin, Illinois, serves older adults of all incomes, including ... their independence. , Becky Baker will entertain guests on ... during the luau. , For more information, call 309-477-8800. ...
(Date:4/17/2015)... 2015 ERGO-Pedic Products, LLC, which produces ... new products to help a broader range of people ... are the second most common visitors to doctors. , ... specifically to help relieve sitting pain. Then, only a ... of happy customers later, we began getting questions from ...
(Date:4/17/2015)... Alcohol and Violence , The National Council ... and driving has been the focus of much public ... link between alcohol and crime received less public attention. ... sexual assault, and their relationship to alcohol have been ... adults in America were drinking alcohol at the time ...
Breaking Medicine News(10 mins):Health News:A Personal Safety Application was Featured on NewsWatch Television 2Health News:It’s Not Just A Girl Thing: Queendom Study Reveals That Men Struggle With Emotional Eating Too 2Health News:It’s Not Just A Girl Thing: Queendom Study Reveals That Men Struggle With Emotional Eating Too 3Health News:It’s Not Just A Girl Thing: Queendom Study Reveals That Men Struggle With Emotional Eating Too 4Health News:It’s Not Just A Girl Thing: Queendom Study Reveals That Men Struggle With Emotional Eating Too 5Health News:It’s Not Just A Girl Thing: Queendom Study Reveals That Men Struggle With Emotional Eating Too 6Health News:John Evans Supportive Living Community Prepares for Party on the Patio 2Health News:Seat Cushion Company Credits Customer Driven Design For Two New Products 2Health News:Narconon Arrowhead Raises Awareness on Alcohol Related Prevention 2Health News:Narconon Arrowhead Raises Awareness on Alcohol Related Prevention 3
... ATLANTA - Two drugs approved for use as second line ... frontline therapy for newly diagnosed patients in two clinical trials, ... M. D. Anderson Cancer Center report at the 49th annual ... All patients in both trials have a complete cytogenetic response ...
... PORTLAND, Ore. Gleevec, the targeted cancer pill that has ... with a dire leukemia, as well as preventing disease progression ... , Data at this weekends meeting continues to ... so many, many patients facing cancer, said Brian Druker, M.D., ...
... ALTO, Calif., Dec. 8 Telik, Inc.,(Nasdaq: ... Phase 1,dose-escalation study of TELINTRA(R) (ezatiostat HCl) Tablets ... Phase 2,clinical trials. The data were reported at ... Hematology in Atlanta., The objectives of the ...
... Dec. 8 Data that shed new light ... total,hip replacement, chronic immune thrombocytopenic purpura, and venous,thrombosis ... presented at the 49th Annual Meeting of the ... conference will reveal this new research,on Saturday, December ...
... between mitochondria, memory and socialization , FRIDAY, Dec. ... deficiencies in mitochondria (the source of energy in ... and spatial memory, Japanese researchers report. , The ... between mitochondrial malfunction and mental illness in humans, ...
... a reminder that we must remain vigilant,in protecting women,s ... dedicated health care professionals who provide that care, ... Vicki Saporta, President and CEO of the National Abortion,Federation, ... MD, in Albuquerque,NM:, As the professional association of ...
Cached Medicine News:Health News:Dasatinib, Nilotinib show strong early results as frontline therapy for chronic myelogenous leukemia 2Health News:Dasatinib, Nilotinib show strong early results as frontline therapy for chronic myelogenous leukemia 3Health News:Gleevec, the targeted cancer pill, delivers more good news to patients 2Health News:Telik Reports Positive Results From Phase 1 Dose-Escalation Study of TELINTRA Tablets in Myelodysplastic Syndrome 2Health News:Telik Reports Positive Results From Phase 1 Dose-Escalation Study of TELINTRA Tablets in Myelodysplastic Syndrome 3Health News:Research Highlights New Approaches to Management of Blood Clotting and Bleeding Disorders 2Health News:Research Highlights New Approaches to Management of Blood Clotting and Bleeding Disorders 3Health News:Research Highlights New Approaches to Management of Blood Clotting and Bleeding Disorders 4Health News:Research Highlights New Approaches to Management of Blood Clotting and Bleeding Disorders 5Health News:Research Highlights New Approaches to Management of Blood Clotting and Bleeding Disorders 6
(Date:4/17/2015)... Apr. 17, 2015 Steven Rash , the ... and its operating subsidiary American Seed & Oil Company, ... to investors yesterday in New York City.  Mr. Rash,s ... The American Seed & Oil Company has recently announced ... Butter Hemp Seed Foods , the EpiVape , ...
(Date:4/17/2015)... 17, 2015   IBA Molecular, a global ... today that it has signed a definitive agreement to ... (IBAM NA), to Illinois Health and Science (IHS). Under IHS ... independent company headquartered in Dulles, Virginia ... of new product and footprint synergies. IBA Molecular is ...
(Date:4/17/2015)... 17, 2015 Sigma-Aldrich Corporation ... and High Technology company, today announced the opening ... headquarters and state-of-the-art Cell Culture Technical Center in ... will provide customized support to meet customer needs, ... "Our new Technical Center will significantly enhance ...
Breaking Medicine Technology:American Seed & Oil Company Benchmarks its Consumer Product Development Strategy Against Proctor & Gamble 2American Seed & Oil Company Benchmarks its Consumer Product Development Strategy Against Proctor & Gamble 3Health Care System to Acquire IBA Molecular North America 2Health Care System to Acquire IBA Molecular North America 3Sigma-Aldrich Expands Customer-Centric Model with Investments in Singapore That Localize World-Class Capabilities to Better Support Customers in Asia 2Sigma-Aldrich Expands Customer-Centric Model with Investments in Singapore That Localize World-Class Capabilities to Better Support Customers in Asia 3Sigma-Aldrich Expands Customer-Centric Model with Investments in Singapore That Localize World-Class Capabilities to Better Support Customers in Asia 4Sigma-Aldrich Expands Customer-Centric Model with Investments in Singapore That Localize World-Class Capabilities to Better Support Customers in Asia 5
... Low rates of meningococcal vaccination among adolescents in ... Neighborcare Health and the Immunization Action Coalition of ... Nurses Organization of Washington (SNOW) to declare today ... public health survey shows that meningococcal vaccination rates ...
... In an effort to improve the quality of care ... bases throughout the Area Support Group - Kuwait while ... announced that The George Washington University Medical Faculty Associates ... manage medical information gathered from field physicals in the ...
Cached Medicine Technology:Local School Nurses Unite Community to Combat Low Meningitis Vaccination Rates among Preteens and Teens in Seattle and King County 2Local School Nurses Unite Community to Combat Low Meningitis Vaccination Rates among Preteens and Teens in Seattle and King County 3Local School Nurses Unite Community to Combat Low Meningitis Vaccination Rates among Preteens and Teens in Seattle and King County 4Local School Nurses Unite Community to Combat Low Meningitis Vaccination Rates among Preteens and Teens in Seattle and King County 5Washington D.C. Health System Implements WebChart from Medical Informatics Engineering to Manage Military Physicals and Maritime Medicine Worldwide 2Washington D.C. Health System Implements WebChart from Medical Informatics Engineering to Manage Military Physicals and Maritime Medicine Worldwide 3
... 50 psi MaxiCompressor, the workhorse ... run 24 hours a day, ... features a tamper-proof locking regulator ... increases or decreases in pressure ...
The 45 PSI SuperSportNeb provides superior performance that translates to shorter treatment times. Like the SportNeb, it is constructed with die-cast aluminum compressor components for consistent rel...
... The very popular and competitively priced ... aluminum compressor. Design enhancements include a ... and optional black carry bag. The ... use. The SportNeb also offers private ...
... Compact Compressor provides effective therapy at an affordable ... at home or on the go and features ... same reliable operation you have come to count ... is the perfect solution for those patients seeking ...
Medicine Products: