Navigation Links
Mercury in Mackenzie River delta dramatically higher than previously believed
Date:6/16/2009

EdmontonUniversity of Alberta researchers conducting a water study in the Mackenzie River Delta have found a dramatically higher delivery of mercury from the Mackenzie River to the Arctic Ocean than determined in previous studies.

Researcher Jennifer Graydon analyzed water in the Mackenzie River as it flowed north into the Beaufort Sea. She collected samples for three months and discovered the total amount of mercury exported from the river during that three-month period was equal to an entire year's worth of mercury calculated in previous studies.

Graydon's research and previous studies measured export of all chemical forms of mercury in water including methyl mercury.

"Methyl mercury is a neurotoxin and it's primarily passed on to humans through contaminated fish muscle," Graydon said. "This leaves northern communities vulnerable, because a large part of their diet is Arctic fish species and Beluga whales." Gradyon says existing studies already show Beluga whales in the western Arctic have higher mercury levels in their flesh than Belugas in the eastern Arctic. The Mackenzie River empties in the Beaufort Sea at the western edge of the Northwest Territories.

Graydon's new estimates were confined to the three months the research team spent on the delta while previous research used data to model mercury export over the course of an entire year.

"Previous annual mercury delivery estimates are premature because of the understudied effects of spring ice-jamming and of 45,000 delta lakes," said Graydon. "That influence water chemistry as the Mackenzie River passes through the delta."

"There are very few point sources for mercury in the Arctic," said Graydon. "Mercury is a metal that undergoes long range transport so the Arctic is getting mercury from a global pool." Graydon says the biggest contributor of man-made mercury pollution is coal-fired power production.

This summer U of A researchers will return to the Mackenzie region after it floods to study mercury levels in the thousands of lakes in the delta when flooded by the river. Graydon's Mackenzie River research was published in the journal Science of the Total Environment earlier this year.


'/>"/>

Contact: Brian Murphy
brian,murphy@ualberta.ca
780-492-6267
University of Alberta
Source:Eurekalert

Related medicine news :

1. Shareholders Challenge Danaher/Kerr to Phase Out Mercury Tooth Fillings
2. Mercury in Fish is a Global Health Concern
3. Mercury Computer Systems Announces the Sale of Visage Imaging to Pro Medicus Limited
4. Study Finds High-Fructose Corn Syrup Contains Mercury
5. Women in Coastal Areas Have Higher Mercury Levels
6. CU Statement on FDA Position on Mercury From Fish Consumption
7. FDAs Proposed Mercury Fish Advice Based on Flawed Science, Say MD and Anti-Mercury Advocates
8. Leahy Slams Midnight Bid to Relax Mercury-in-Fish Warnings to Women and Children
9. Health Care Without Harm, WHO Announce Partnership for Global Reduction of Mercury-Based Medical Devices
10. Elements for a UN Global Framework on Mercury Agreed to
11. New Evidence Highlights Dangers of Mercury Toxicity in Fish
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/13/2017)... ... October 13, 2017 , ... Ellevate Network, the leading network ... advocate for action towards gender equality at their inaugural Summit in New York City ... and reached a social audience of over 3 million. To watch the Mobilize Women ...
(Date:10/13/2017)... ... 13, 2017 , ... Coveros, a leader in agile coaching ... contract by the Center for Medicare and Medicaid Services (CMS). The Enterprise Agile ... of Agile methodologies in a consistent and high value manner across CMS programs. ...
(Date:10/12/2017)... ... October 12, 2017 , ... CitiDent and San ... using cutting-edge Oventus O2Vent technology. As many as 18 million Americans are ... cessation in breathing. Oral appliances can offer significant relief to about 75 percent ...
(Date:10/12/2017)... , ... October 12, 2017 , ... The American College ... to Carol Friedman, PhD, FACMI, during the Opening Session of AMIA’s Annual Symposium in ... , In honor of Morris F. Collen, a pioneer in the field of medical ...
(Date:10/12/2017)... ... , ... HMP , a leader in healthcare events and education, today announced ... Award for ‘Best B-to-B Healthcare Website.’ Winners were announced during the Eddie & Ozzie ... competition recognizes editorial and design excellence across a range of sectors. This year’s program ...
Breaking Medicine News(10 mins):
(Date:10/11/2017)... 2017  True Health, a leader in integrated ... during National Breast Cancer Awareness month to educate ... Research recently published ... more than 10 million American women are at ... or BRCA2 and have not had testing. These mutations ...
(Date:10/5/2017)... Oct. 5, 2017  In response to the ... and Maxillofacial Surgeons (AAOMS) released prescribing recommendations that ... be used as a first-line therapy to manage ... Recognizing the value and ... Paper "Opioid Prescribing: Acute and Postoperative Pain Management" ...
(Date:10/2/2017)... 2, 2017  Eli Lilly and Company (NYSE: ... the third quarter of 2017 on Tuesday, October 24, ... that day with the investment community and media to ... conference call will begin at 9 a.m. Eastern time. ... live webcast of the conference call through a link ...
Breaking Medicine Technology: