Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

'Emerging contaminants of concern' detected throughout Narragansett Bay watershed

22.09.2011
Chemicals found at low levels at all sites tested

A group of hazardous chemical compounds that are common in industrial processes and personal care products but which are not typically monitored by the Environmental Protection Agency have been detected throughout the Narragansett Bay watershed, according to a URI researcher.

Rainer Lohmann, associate professor of chemical oceanography, and graduate student Victoria Sacks, with the help of 40 volunteers, tested for the presence of the chemicals in 27 locations. The compounds were found at every site.

"Being exposed to these compounds is the hidden cost of our lifestyle," said Lohmann. "It's frustrating that as we ban the use of some chemical compounds, industry is adding new ones that we don't know are any better."

Lohmann said the good news is that the chemicals were detected at extremely low levels.

"By themselves, none of these results makes me think that we shouldn't be swimming in the bay or eating fish caught there," he said. "But we only tested for three compounds that might be of concern, and we know there are hundreds more out there. The totality of all those compounds together is what may be worrisome."

The three compounds the researchers measured, which scientists refer to as "emerging contaminants of concern," are: triclosans, antibacterial agents found in many personal care products and which have been identified as posing risks to humans and the environment; alkylphenols, widely used as detergents and known to disrupt the reproductive system; and PBDEs, industrial products used as flame retardants on a wide variety of consumer products. PBDEs have been banned because they cause long-term adverse effects in humans and wildlife.

PBDEs, methyltriclosan and triclosan were found in highest concentrations in the Blackstone River, Woonasquatucket River and in upper Narragansett Bay, while some detergents were detected at similar levels at nearly every site.

"Many of the trends in society – from early puberty changes to some diseases – may be caused by chemical exposures," said Lohmann. "They trigger hormones and disrupt the normal functioning of the body. We have no resistance against them."

The chemical compounds were detected using polyethelene passive samplers, thin pieces of plastic that absorb chemicals that are dissolved in water. The volunteers placed the samplers in various rivers and coves in the Narragansett Bay watershed in the fall of 2009 and retrieved them two to three weeks later. The chemical compounds were then extracted from the samplers in a lab at the URI Graduate School of Oceanography.

"We couldn't have done this work without the volunteers," Lohmann said. "They have helped us find potential sources for some of these chemicals."

"Unfortunately, no matter how you choose your lifestyle, you can't avoid exposure to these compounds," he added. "You just can't escape."

Todd McLeish | EurekAlert!
Further information:
http://www.uri.edu

More articles from Life Sciences:

nachricht Closing in on advanced prostate cancer
13.12.2017 | Institute for Research in Biomedicine (IRB Barcelona)

nachricht Visualizing single molecules in whole cells with a new spin
13.12.2017 | Wyss Institute for Biologically Inspired Engineering at Harvard

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Long-lived storage of a photonic qubit for worldwide teleportation

MPQ scientists achieve long storage times for photonic quantum bits which break the lower bound for direct teleportation in a global quantum network.

Concerning the development of quantum memories for the realization of global quantum networks, scientists of the Quantum Dynamics Division led by Professor...

Im Focus: Electromagnetic water cloak eliminates drag and wake

Detailed calculations show water cloaks are feasible with today's technology

Researchers have developed a water cloaking concept based on electromagnetic forces that could eliminate an object's wake, greatly reducing its drag while...

Im Focus: Scientists channel graphene to understand filtration and ion transport into cells

Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms--ions--but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play a critical role in biological functions such as muscle contraction and the firing of brain cells.

To rapidly transport the right ions through the cell membrane, the tiny channels rely on a complex interplay between the ions and surrounding molecules,...

Im Focus: Towards data storage at the single molecule level

The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.

Over the past few years, the building blocks of storage media have gotten ever smaller. But further miniaturization of the current technology is hindered by...

Im Focus: Successful Mechanical Testing of Nanowires

With innovative experiments, researchers at the Helmholtz-Zentrums Geesthacht and the Technical University Hamburg unravel why tiny metallic structures are extremely strong

Light-weight and simultaneously strong – porous metallic nanomaterials promise interesting applications as, for instance, for future aeroplanes with enhanced...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

See, understand and experience the work of the future

11.12.2017 | Event News

Innovative strategies to tackle parasitic worms

08.12.2017 | Event News

AKL’18: The opportunities and challenges of digitalization in the laser industry

07.12.2017 | Event News

 
Latest News

A whole-body approach to understanding chemosensory cells

13.12.2017 | Health and Medicine

Water without windows: Capturing water vapor inside an electron microscope

13.12.2017 | Physics and Astronomy

Cellular Self-Digestion Process Triggers Autoimmune Disease

13.12.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>