Navigation Links
Study shows brass devices in plumbing systems can create serious lead-in-water problems
Date:11/11/2010

eventually was traced to a source in the building's piping system upstream of the water fountains. The cause was a particular type of ball valve and the problem disappeared when the valves were removed. The valves were later found to have as much as 18 percent lead by weight on the inner surfaces contacting the drinking water. Later testing proved the valves would leach lead at levels high above the EPA standard for months.

The valves were considered legal, because their average overall lead content was just under the 8 percent limit allowed by law, and were listed as having passed the lead leaching standards of National Sanitation Foundation International, the plumbing device industry's national standard-setting body. While there have been other verified cases of brass devices such as faucets and water fountains at the end of plumbing lines leaching high lead to water, this situation is the first time that a device upstream in a plumbing line has been proven to leach dangerous levels of lead to drinking water that reached the tap.

It verified earlier research by Edwards, which expressed concern about relatively lax standards testing used to certify brass devices for use in plumbing systems as safe. In response to that work, the National Sanitation Foundation implemented more rigorous criteria, which will come into effect in 2012. However, these tougher standards reflect the California standards, and the Chapel Hill-Virginia Tech research team's experience indicates that they probably are still too lax, the authors said.

Edwards, named a MacArthur Fellow in 2007, said the case highlighted concerns about high lead content in certain brass plumbing devices, and the need for a method of preventing the installation of defective products in new construction.

"The levels of lead detected at UNC exceeded those known to cause elevated blood lead in children, as established by the Centers for Disease Control, and even levels causing ac
'/>"/>

Contact: Steven Mackay
smackay@vt.edu
540-231-4787
Virginia Tech
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Study shows young, unsupervised children most at risk for dog bites
2. Chimerix Antiviral CMX001 Inhibits JC Virus Replication in Preclinical Study; Late-Breaker Presented at Antiviral Congress 2010
3. New ocean acidification study shows added danger to already struggling coral reefs
4. Iron stimulates blooms of toxin-producing algae in open ocean, study finds
5. Study examines risk of heterosexual HIV transmission in China
6. Studying the metabolome of smokers, Lombardi researchers find early signs of damage
7. Study shows extreme form of pregnancy-related morning sickness could be genetic
8. Motor Neurone Disease Association study identifies MND biomarker
9. LSU researcher participates in NIH-funded study ushering in the age of personal genomics
10. Study shows a single shot of morphine has long lasting effects on testosterone levels
11. Study shows how ancient plants and soil fungi turned the Earth green
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Study shows brass devices in plumbing systems can create serious lead-in-water problems
(Date:7/10/2014)... 9, 2014  Acuity Market Intelligence today released forecasts from ... indicating that the global market for National Electronic ID (eID) ... 2018. During this time, the number of National eID cards ... Asia , with its vast population, will ... cards issued, while Europe trails a ...
(Date:7/10/2014)... Axinaea belongs to the large, mainly tropical flowering plant ... species in the family rely on bees for their pollination. ... insects or vertebrates. The flowers of Axinaea appear ... the petals of the different species are pink, yellow, orange ... on the contrasting colours of their bulbous appendages. The pollination ...
(Date:7/10/2014)... German . An ... a central step of photosynthesis in action for the first ... State University used the world,s most powerful X-ray flashlight at ... of a molecular complex called photosystem II as it splits ... oxygen in earth,s atmosphere. The researchers report their results in ...
Breaking Biology News(10 mins):National Electronic ID Programs Generate $54 Billion Between 2013 and 2018 with 3.5 Billion National eID Card Holders Worldwide 2Novel type of bird pollination mechanism discovered in South America 2Scientists watch photosynthesis in action 2Scientists watch photosynthesis in action 3
... a land owner and animals such as coyotes or wild pigs ... way to control their numbers in a humane way in ... at Texas A&M Universitys College of Veterinary Medicine & Biomedical Sciences. ... baited food, researchers say. Researchers are testing oral contraceptives ...
... at the center of some of the nation,s most ... global climate change. To provide a critical overview of ... summit of leading energy experts from the government, research ... an Academies study under way called "America,s Energy Future: ...
... syndrome (FXS) is the most common hereditary form of ... attention deficit and/or hyperactivity disorder (ADHD), which complicates social ... such as Ritalin is often successfully used to treat ... is effective in children with mental retardation, it also ...
Cached Biology News:Texas A&M testing oral contraceptives for animals 2NAS to hold 2-day summit on energy issues 2Effective ADHD treatment found for children with fragile X syndrome 2
(Date:7/10/2014)... 10, 2014 Terascala, the industry leader ... Alan Swahn, a former vice president of product management ... vice president of marketing. Terascala’s software when combined with ... create the highest performance and most reliable solutions for ... guide Terascala’s channel expansion and broaden its product portfolio. ...
(Date:7/10/2014)... 10, 2014 Senior supply chain management ... associations, addressed the challenges of “Reducing Cost, Lead Time, ... through strategic sourcing. Describing the partnership of the Bio ... Chain Management Institute ( SCMI) of the University ... 24 at the Kroc Institute of Peace and Justice ...
(Date:7/10/2014)... 10, 2014 Research and Markets ( ... "International Photonic Integrated Circuit (Monolithic Integration, Hybrid ... report to their offering. ... of photonic integration traces its roots in the ... of photonic integration went unexplored and unfulfilled for ...
(Date:7/10/2014)... study published today in the journal PNAS (Proceedings ... that time of day and sleep deprivation have a ... crucial when looking at the best time of day ... disease, and for administering medicines effectively. , Researchers from ... Research, London, investigated the links between sleep deprivation, body ...
Breaking Biology Technology:Terascala Expands Executive Team 2Terascala Expands Executive Team 3Biotech & Biopharm Supply Chain Management Executives Launch BSMA in San Diego 2Biotech & Biopharm Supply Chain Management Executives Launch BSMA in San Diego 3Biotech & Biopharm Supply Chain Management Executives Launch BSMA in San Diego 4International Photonic Integrated Circuit (Monolithic Integration, Hybrid Integration, Module Integration) Market - Forecasts to 2019 2Time of day crucial to accurately test for diseases, new research finds 2
... trails national averages in venture capital availability, but the ... detailed in a new report, NorthStar Guide to ... Inc. The report is subtitled, A sourcebook to growth ... Technology Network received an advance copy of the 60-page ...
... An Inquiry Into the Nature and Causes of The Wealth ... was the 18th century equivalent of todays (sanitized) bumper sticker: ... annual revenue of the society as great as he can, ... promote the public interest, nor knows how much he is ...
... joined Green Bays Nsight Telservices (www.nsighttel.com) in 2001 as ... action-packed stint as Chief Technical Officer (CTO) of Chicago ... Local Nsight, NET Cable, and NetNet and heads up ... Services (LMDS) deployment. , , WTN: How did ...
Cached Biology Technology:Growing Venture Capital in Wisconsin 2Growing Venture Capital in Wisconsin 3Wisconsin Economic Summits have given a hand to states progress 2Wisconsin Economic Summits have given a hand to states progress 3Interview: WTN Gets Real with Appletons Brad Hansen - Dot-Com Experience helps Executive to Spot Trends 2Interview: WTN Gets Real with Appletons Brad Hansen - Dot-Com Experience helps Executive to Spot Trends 3
... is an automated instrument with a thin ... real-time using light or fluorescence microscopy. Biaxial ... and fibroblast cells can be simulated by ... and Y axis of our strain chamber. ...
... regulate cell stretching or compression of a ... Computer controlled so you can precisely regulate ... to produce 64 unique strain parameters. ST-160 ... ST-150. Both models are compatible with Nikon, ...
... Glycosylation is a post-translational modification ... biological functions, including immune regulation, inflammation, ... Biotechnology has developed two lectin based ... and Wheat Germ Agglutinin (WGA), that ...
... activated carrier proteins to simplify the ... Activated Carrier Proteins are commonly used ... a heterobifunctional cross-linker (Sulfo-SMCC). This activation ... protein. Thus allowing the maleimide-activated ...
Biology Products: