Do Lead Bullets Continue To Be A Hazard After They Land?

[GCSInc]

http://www.sciencedaily.com/releases/20 ... 005801.htm

Do Lead Bullets Continue To Be A Hazard After They Land?
ScienceDaily (Nov. 5, 2004) — Blacksburg, Va., November 3, 2004 -- There were 20 million metric tons of lead bullets fired in the United States in the 20th century. Is that lead having an environmental impact?
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Not at or near the U.S. Forest Service firing range near Blacksburg, according to research by Virginia Tech geological scientists. Donald Rimstidt, a professor in the Department of Geosciences, College of Science at Virginia Tech, will report the conclusions of a five-year study at the 116th national meeting of the Geological Sciences of America in Denver Nov. 7-10.
There are 9,000 nonmilitary shooting ranges and a lot of military ones in the United States. Some 60,000 metric tons of lead are expended by shooting (A metric ton or "long ton" is 2,200 lbs.). "So, there is lead shot and bullets everywhere," Rimstidt said.
"We were invited by the U.S. Forest Service to look at the shooting range in the National Forest near Blacksburg."
The researchers'' survey found 11 metric tons of shot in the shotgun range and 12 metric tons of lead bullets in the rifle range. "These ranges are 10 years old. Most of the lead shot has accumulated on about four or five acres. Some shots have been into the woods, which cover hundreds of acres," Rimstidt said.
Professor James Craig, now retired, and Rimstidt looked first at lead corrosion and whether lead is leaching into the water table or streams. "Lead metal is unstable when it is in contact with air and water. It corrodes and forms hydrocerrussite, the white coating seen on old bullets in museums. That slows corrosion," Rimstidt said.
However some lead escapes, he said. "But we learned that it is absorbed in the top few inches of soil and does not migrate beyond that," Rimstidt said. "Lead is not very mobile. It does not wash away in surface or ground water."
Another finding is that there are large amounts of lead in the trees near the shooting range – but not in a large percentage of the trees, Rimstidt said. "If and when those trees are harvested, they would be contaminated with lead "
Fisheries and Wildlife professor Pat Scanlon was an investigator on the project until his death in 2003. "He found no evidence that birds were eating shot, but this portion of the research was not completed," Rimstidt said. "We are not saying that wildlife would not ingest lead, but it does not appear to be a problem on this range. Other shooting ranges may be different."
Rimstidt will give their recommendations to the Forest Service representatives so they can develop best management practices. "They already knew to put lime on the range to limit corrosion, to take measures to prevent soil erosion, and now, to keep track of the trees if they are cut. They are the experts in management. I will give them the facts, and they will make the decisions," Rimstidt said.
Rimstidt''s conclusion is that shooting on controlled ranges reduces the overall risk to the public from lead in the environment.
He will present the paper, "Lead behavior at National Forest Shooting Ranges," by Rimstidt, Craig, and Caleb Scheetz at 11:15 a.m., Nov. 8, in rooms 709/711 of the Colorado Convention Center as part of the Environmental Geosciences session. Scheetz, of Lemont, Pa., recently received his master''s in geosciences from Virginia Tech.
Founded in 1872 as a land-grant college, Virginia Tech has grown to become among the largest universities in the Commonwealth of Virginia. Today, Virginia Tech’s eight colleges are dedicated to putting knowledge to work through teaching, research, and outreach activities and to fulfilling its vision to be among the top research universities in the nation. At its 2,600-acre main campus located in Blacksburg and other campus centers in Northern Virginia, Southwest Virginia, Hampton Roads, Richmond, and Roanoke, Virginia Tech enrolls more than 28,000 full- and part-time undergraduate and graduate students from all 50 states and more than 100 countries in 180 academic degree programs.
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The above story is reprinted (with editorial adaptations by ScienceDaily staff) from materials provided by Virginia Tech.
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[Rover]

Thanks! Useful and interesting.

[chuckjordan]

Galena IL was a lead mining town many, years ago. There are natural lead deposits, some at the surface.

You can pickup natural lead chunks at the surface of the soil just about everywhere. How do I know? I went there on a grade school field trip and picked-up a couple natural nuggets.

If you know your geography, you'll note the Galena IL is directly on the Mississippi river. And Galena is hilly and you must believe that lead runoff must have happened into the Mississippi river.

Lead is a poisonous substance when ingested, yet, statistically there are not more health issues with long-time Galena residents.

Everyone should wash their hands after a shooting (or reloading) session.

[1813Anschutz]

How environmentally correct must we be? The lead came from the earth and all we are doing is putting it back a little bit at a time. So it came from the earth and goes back to the earth where is the problem?
That has been my answer to some do gooders I have encountered....
Randy

[angelmr]

It depends from manny factors, but definitely there are migration of lead ions from metal to the soil. Any sources of lead in places where drinking wather is extracted are intolerable. The same can be told for soil suitable for farming. For example look how ended roman empire.

@1813Anschutz
Lead in earth is generely in sulfide form (PbS), thаt have verry low solubility and generally is found in places far from wather sources. Natural form of lead is verry different from metal or oxide form. Infact lead is as dangerous аs radiation. So use it with caution.