EXTRACTING MERCURY FROM THE DENTIST’S OFFICE

  • Lorraine Kellerman operates the mercury separator in one dental office. Kellerman says it's easy and satisfying to recycle the mercury.

Health officials warn pregnant women and children to avoid eating certain kinds of fish. Mercury built up in the fish can damage the nervous system and impair children’s mental development. The National Academy of Sciences says at least 60,000 American children are born at risk for impaired development every year because their mothers were exposed to mercury. Mercury has been eliminated from paint, batteries, and other products. Now, some dentists are doing their part to reduce the mercury going into the environment. The Great Lakes Radio Consortium’s Stephanie Hemphill reports:

Transcript

Health officials warn pregnant women and children to avoid eating certain kinds of fish.
Mercury built up in the fish can damage the nervous system and impair children’s mental
development. The National Academy of Sciences says at least 60,000 American children
are born at risk for impaired development every year because their mothers were exposed
to mercury. Mercury has been eliminated from paint, batteries, and other products. Now,
some dentists are doing their part to reduce the mercury going into the environment. The
Great Lakes Radio Consortium’s Stephanie Hemphill reports:


Mercury is an essential part of dental amalgam, the silver stuff used to fill cavities. The
mercury keeps the amalgam soft until it’s pressed into the cavity, then it bonds to form a
very stable, durable filling. The problem is the small bits of amalgam that are left over
after the cavity is filled. The suction hose that cleans them out of your mouth generally
dumps them down the drain. So they can easily end up in a lake or river, where they can
be eaten by fish.


The average dental office creates about a half pound of waste mercury every year. Just a
tiny portion of that would be enough to warrant fish advisories.


“The amount that’s sewered from dental offices is probably the largest input to the sewer
system.”


Tim Tuominen is a pollution prevention specialist with the Western Lake Superior
Sanitary District in Duluth. He’s been working with dentists in the city for nearly ten
years to reduce the mercury they wash down the drain.


He started with the vacuum systems nearly all dentists already have. When the suction
hose whisks amalgam out of your mouth, the pieces are held in a container to keep them
from damaging the vacuum pump. Tuominen showed the dentists how to empty the
container and bring the contents to the district’s recycling program.


In the first two years, the amount of mercury coming into Duluth’s wastewater treatment
plant was cut in half, and it’s been reduced even further since then.


To cut down on mercury even more, Tuominen got a grant to buy more expensive
equipment that captures up to 99% of the amalgam. He offered the equipment free to any
dentist who would agree to use it.


“I’ll go in and install them, train the assistants and the dentists how they operate, that only
takes about half an hour, then after six months I show them how to manage the solids
particles that collect in them over that time period. So it’s really pretty simple.”


Most of the dental offices in Duluth have installed the systems, and Tuominen expects the
rest to follow suit.


Lorraine Kellerman operates the system in one dental office. Once a week she empties
the chair-side traps and puts the chunks of amalgam into a container for recycling. Then
she goes down to the basement where a tank, like an aquarium, collects the finer particles.
The heavy amalgam settles to the bottom of the tank.


“We just put the hose in the drain, turn the lever, and you just wait ’til the fluid runs out
and then you can come back down, it doesn’t take long, it only takes a few minutes
basically.”


Once a year the amalgam that collects at the bottom is cleaned out and recycled.


Kellerman’s boss is dentist Jim Westman.


“The beauty of this technology is in its simplicity. Gravity works, it’s simple, it’s very
inexpensive.”


Westman says the dentists in Duluth are happy to use the equipment. It costs about
$500, and the recycling charge is about $50 a year.


Westman is chair of the Minnesota Dental Association’s environmental committee. It’s
been working on a plan to help dentists around the state of Minnesota reduce their output
of mercury. Westman says they want to make it easy for dentists.


“No matter where someone has question in regards to what’s going to work in my
equipment, there’s so many variations from one office to the next, who are my resources
to call or handling, transport, process materials, it’s that who you going to call side of the
question that’s going to make a difference as we build a bigger program. ”


If the voluntary program catches on in Minnesota, it could spread to other states. Michael
Bender is director of the Mercury Policy Project, a national organization working to
reduce mercury in the environment. He says dentists around the country are beginning to
feel they should do their part.


“It’s part of the cost of doing business. It’s not going to break any dentist’s back
financially to cover the cost of doing whatever it takes to be a good business, responsible
to the community, responsible to the environment.”


In December, the Environmental Protection Agency is convening a meeting on dental
mercury. The agency will publish information on ways state and local governments can
keep dental mercury out of the environment.


For the Great Lakes Radio Consortium, I’m Stephanie Hemphill.

Raging Grannies Take to the Streets

  • They're not your typical protestors. Photo courtesy of Raging Grannies of British Columbia.

When we think of protestors these days, many of us conjure up images of twenty-year-olds with bandanas, long hair, and multiple piercings. But there’s another group attracting attention at protests. As the Great Lakes Radio Consortium’s Karen Kelly reports, they call themselves the Raging Grannies:

Transcript

When we think of protestors these days, many of us conjure up images of twenty-year-olds with
bandanas, long hair, and multiple piercings. But there’s another group attracting attention at
protests. As the Great Lakes Radio Consortium’s Karen Kelly reports, they call themselves the
‘Raging Grannies.’


(chattering)


People chat and drink coffee as they mingle between display tables at the Dandelion Festival in
Kingston, Ontario. But the friendly chatter is soon interrupted by the sound of drums in the
distance.


(sound up)


Before long, a conga line of elderly-looking women comes into sight. Their outfits cause jaws to
drop. Shawls are layered on aprons, on top of housecoats and striped leggings – all topped off by
hats piled high with flowers, birds, and fruit. The ‘Raging Grannies’ know how to make an
entrance.


(dandelion lawns now…)


With their own take on familiar songs, the grannies captivate the audience. People stop
everything to stare at eighty crazily dressed women playing the washboard and singing at the
top of their lungs.


And that’s when the grannies deliver their message – about things like pollution, poverty, or health
care.


63-year-old Margaret Slavin-Diamond says the grannies are true subversives.


“We deliberately look older than we are, and we deliberately play on the idea that people expect
less of older women. And then say things with these tunes that people think of as old-fashioned
and safe, and then we say things that have a real edge to them.”


The first group of Raging Grannies was founded in British Columbia in the mid-80s.
There are now about 60 groups, including chapters in Minnesota, New York and California.
The grannies like to make surprise appearances – at events like political functions and chemical
industry meetings. There’s no real hierarchy among the grannies. But there is one rule – you
must be a woman and over 55.


(Rose singing)


60-year-old Rose Deshaw sits on a couch, bouncing as she sings. Even in this crowd of bizarre
outfits, Rose stands out. She wears a neon striped dress and bright yellow feathers in her hair.
She resembles an exotic bird. And like many of the women here, Rose comes primarily
as a grandmother.


(finish song, then fade)


“A lot of times in a protest, I just carry a picture of my grandbaby. That’s all I need to carry
cause they know what that’s about.”


Rose is one of the creative forces behind the raging grannies. She writes many of the songs and
she’s author of a ‘Raging Granny’ comic strip in a local newspaper. She’s also been known to lead
the group with help of a rubber chicken.


“It makes people sort of relax. You’re not going to get too uptight with an old lady who’s leading
the singing with a rubber chicken. You don’t know what she’s going to do so you might stay
awake and watch it.”


It’s all part of the group’s mission to soften people’s skepticism with humor. John Bennett of the
Sierra Club says the grannies’ style is effective.


“They often can take a political point and make it very clear in a very quick little song. That’s
much easier to do than the long speech to deliver the message.”


But its not all grandmotherhood and apple pie. At one demonstration, a group of raging grannies
shielded a protestor, preventing his arrest. Others were tear-gassed.


Margaret Slavin-Diamond says she’s seen grannies challenge an officer in riot gear.


“They see that man as their son, a man that they are about and they try to talk to him in those
terms, of what do you think you’re doing? I think that’s something older women in particular are
able to do from our hearts.


(zip pe dee do dah…)


As charming as these women seem to be, law enforcement officials do take them seriously.
The Raging Grannies recently discovered that the Canadian Security and Intelligence Agency
listed them as a subversive group. It’s a label they wear proudly.


For the Great Lakes Radio Consortium, I’m Karen Kelly.

PCBs LINKED TO MEMORY LOSS IN ADULTS

A new study finds that eating contaminated fish from the Great Lakes might have adverse effects on more people than once thought. The Great Lakes Radio Consortium’s Lester Graham reports:

Transcript

A new study finds that eating contaminated fish from the Great Lakes might have adverse effects on more people than once thought. The Great Lakes Radio Consortium’s Lester Graham reports.


For a long time health experts have recognized that small children and women of childbearing age should limit the amount of Great Lakes fish they eat. Fish contaminated with PCB’s, Polychoilnated Biphenyls, could cause developmental problems for children. This new study finds that men should also reduce their exposure to the contaminants. Susan Chantz is a researcher at the University of Illinois and the principal author of the study.


“We are seeing some impact of PCB exposure from Great Lakes fish on memory functions of adults.”


The decade long study found people who eat a lot of fish from the Great Lakes, a couple of pounds a month, generally had lower scores on memory and learning tests than those who ate less fish. For the Great Lakes Radio Consortium, this is Lester Graham.

State to Force Mercury Reductions?

Mercury emissions from more than 150 coal-burning power plants across the Great Lakes are coming under greater scrutiny this summer. Several states are considering ways to reduce those emissions. Wisconsin could become the first state in the nation to issue rules requiring large mercury reductions. The Great Lakes Radio Consortium’s Chuck Quirmbach has the story:

DRUG COURTS TRY TO END CYCLE OF ABUSE (Part 1)

According to a report from the National Institute on Drug Abuse, the economic cost of drug-related crime is about fifty billion dollars a year. Much of that amount goes toward incarcerating offenders. But many of these people are nonviolent, low-level drug users… and now, instead of locking them up, some court systems are trying a different approach. In the first of a two part series, the Great Lakes Radio Consortium’s Wendy Nelson examines the growing trend of drug courts:

ARE DRUG COURTS THE BEST APPROACH? (Part 2)

In 1989, the country’s first drug court was set up in Dade County, Florida. It was designed as a way to reduce prison overcrowding. Today, there are more than three hundred fifty drug courts operating around the country, with another two hundred in the planning stages. But not everyone’s happy with that growth. In the second of a two-part series, the Great Lakes Radio Consortium’s Wendy Nelson reports that some people are questioning whether courts are the best place to deal with substance abuse:

Rowing Camp Empowers Women

During the summer, almost every community has sports camps for children. But for women over 30, it’s tough to find a week-long outdoor experience that’s both physically and mentally challenging. That is, until now. The Great Lakes Radio Consortium’s Karen Kelly recently visited a camp in Massachusetts that introduces women from all walks of life to the sport of rowing:

Drinking Water Linked to Miscarriages

A new government-sponsored study of three California towns has turned up a potentially serious finding: that some tap water could be dangerous for pregnant women. The study is the first to find that high levels of chemicals used to disinfect water could increase the risk of miscarriage. That’s raised a red flag at the Environmental Protection Agency. And now the EPA’s moving quickly to see if the California findings hold true elsewhere. The Great Lakes Radio Consortium’s Julie Edelson Halpert reports:

Female Hormones Found in Waste Water

Millions of American women rely on birth control pills to prevent pregnancy. Millions more depend on replacement hormones to prevent symptoms of menopause like hot flashes and osteoporosis. Both medications contain a synthetic version of the female hormone estrogen. And now, researchers at the University of Mississippi found that some of that estrogen ends up in wastewater. The Great Lakes Radio Consortium’s Steve Frenkel has more on the potential effects:

History of Women in the Great Lakes

Many of the rugged explorers, sailors, and travelers of the Great Lakes wrote about their lives. But most of this rich literary history was told by men. Now a new book uncovers another side of Great Lakes’ history: stories by and about women of the Lakes. The Great Lakes Radio Consortium’s Wendy Nelson reports: