Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Researching airborne metals in transit workers’ bodies

28.02.2005


Steel dust exposure in the NYC subway system has been of concern to subway workers and transit police for decades. A study by Lamont-Doherty Earth Observatory researchers will examine the level of airborne metal in subway workers. Photo credit: Mark Inglis


A pilot study gathers baseline information on subway workers’ exposure

by Jennifer Freeman

Working in the subway several hours each day, subway workers and transit police breathe more subway air than the typical commuter. Subway air has been shown to contain more steel dust than outdoor or other indoor air in New York City. But do transit workers’ bodies harbor elevated levels of these metals? And does this translate into a health concern for the workers?



In a new paper called Steel Dust in the New York City Subway System as a Source of Manganese, Chromium, and Iron Exposures for Transit Workers, Steven Chillrud, a research scientist at the Lamont-Doherty Earth Observatory, and colleagues discuss an ongoing pilot study that takes a closer look at these questions. The paper will be published in the March issue of the Journal of Urban Health, a special issue focusing on subway health research.

The pilot study is expected to show whether 40 transit workers’ blood and urine contains elevated levels of the metals that have been shown to exist in air collected in subway stations. “This is the type of information you need before deciding whether it is worthwhile to investigate any potential health impacts,” Chillrud explains. “Airborne metals levels that have been studied in the past were much higher than those in subway air, but subway levels are higher than outdoor air. So it’s an interesting in-between area.”

As Chillrud and colleagues write in the new paper, “Steel dust exposure in the NYC subway system has been of concern to subway workers and transit police for decades. As one of the largest subway systems in the world, the NYC subway environment could provide important information relevant to evaluating the potential for health effects from exposures to airborne metals.” The authors are researchers from the Lamont-Doherty Earth Observatory at Columbia, the Mailman School of Public Health, and Harvard’s School of Public Health.

Emphasizing that no adverse health effects have been linked to the levels of steel dust present in the subways, Chillrud says no one should stop riding the subway based on his research “We do know that increases in surface traffic emissions have adverse health effects,” he says.

A study published last year, in which high school students who commuted by subway collected air samples during their commutes, suggested that steel dust generated in the New York City subway did significantly increase the total amount of iron, manganese, and chromium that the students breathed. Furthermore, the levels of these airborne metals in the subway air were more than 100 times higher than outdoor or other indoor air in New York, but still 1000 times lower than the Occupational Safety and Health Administration’s Permissible Exposure Limit guidelines for workers. The current study extends the previous research to 40 transit workers, who could be expected to have higher exposure levels than commuters. (For more information on the earlier study, see http://www.earthinstitute.columbia.edu/news/2004/story01-05-04.html)

Also in the March issue, Dr. Robyn Gershon of the Mailman School of Public Health publishes a paper called Health and Safety Hazards Associated with Subways: A Review, which provides a comprehensive look at health and safety hazards that might affect both riders and subway workers, and indicates that while subways in general, and the New York City subway system in particular, are relatively safe, subway systems are vulnerable to a range of health and safety hazards. These include the threat of terrorist attacks, transmission of infectious diseases, subway noise, and a special concern with respect to crime, despite the fact that crime rates generally have been dropping.

Chillrud is one of many Earth Institute scientists whose research focuses on New York City’s environmental problems. Though Earth Institute research extends around the globe, its New York City Initiative encourages and coordinates New York-focused research projects, on topics ranging from garbage to climate to Hudson River ecology. A catalog of New York research by Earth Institute scientists can be found on the Web at http://www.earthinstitute.columbia.edu/nyc/projects.html.

In the past five years, Steven Chillrud’s New York area research has included studying toxins in truck drivers who carted debris from the World Trade Center site, analyzing highway runoff, analyzing groundwaters and Hudson River sediments for studies of contaminant transport, and looking at relations between diesel emissions and asthma.

The Earth Institute at Columbia University is the world’s leading academic center for the integrated study of Earth, its environment and society. The Earth Institute builds upon excellence in the core disciplines — earth sciences, biological sciences, engineering sciences, social sciences and health sciences — and stresses cross-disciplinary approaches to complex problems. Through research, training and global partnerships, it mobilizes science and technology to advance sustainable development, while placing special emphasis on the needs of the world’s poor.

Mary Tobin | EurekAlert!
Further information:
http://www.earth.columbia.edu
http://www.earthinstitute.columbia.edu/nyc/projects.html

More articles from Studies and Analyses:

nachricht Innovative genetic tests for children with developmental disorders and epilepsy
11.07.2018 | Christian-Albrechts-Universität zu Kiel

nachricht Oxygen loss in the coastal Baltic Sea is “unprecedentedly severe”
05.07.2018 | European Geosciences Union

All articles from Studies and Analyses >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Future electronic components to be printed like newspapers

A new manufacturing technique uses a process similar to newspaper printing to form smoother and more flexible metals for making ultrafast electronic devices.

The low-cost process, developed by Purdue University researchers, combines tools already used in industry for manufacturing metals on a large scale, but uses...

Im Focus: First evidence on the source of extragalactic particles

For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.

To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...

Im Focus: Magnetic vortices: Two independent magnetic skyrmion phases discovered in a single material

For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.

Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...

Im Focus: Breaking the bond: To take part or not?

Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.

A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...

Im Focus: New 2D Spectroscopy Methods

Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.

"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Leading experts in Diabetes, Metabolism and Biomedical Engineering discuss Precision Medicine

13.07.2018 | Event News

Conference on Laser Polishing – LaP: Fine Tuning for Surfaces

12.07.2018 | Event News

11th European Wood-based Panel Symposium 2018: Meeting point for the wood-based materials industry

03.07.2018 | Event News

 
Latest News

A smart safe rechargeable zinc ion battery based on sol-gel transition electrolytes

20.07.2018 | Power and Electrical Engineering

Reversing cause and effect is no trouble for quantum computers

20.07.2018 | Information Technology

Princeton-UPenn research team finds physics treasure hidden in a wallpaper pattern

20.07.2018 | Materials Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>