News / Asia

Coal Burning Linked to Fluoride Disease in China

Bones, teeth affected in unventilated homes

Multimedia

Audio
Art Chimes

Fluoride disease is blamed for an outbreak in China that blackened teeth, caused very brittle bones and bone deformation.
Fluoride disease is blamed for an outbreak in China that blackened teeth, caused very brittle bones and bone deformation.

A cluster of villages in China's Guizhou province has been plagued by an outbreak of disease that damages teeth and bones. Now, a new study by Chinese and American researchers puts the blame on polluted coal burned in home fireplaces.

In small quantities, fluoride can prevent tooth decay. But too much fluoride can lead to a whole spectrum of symptoms, and that's what Chinese doctors were seeing, explains chemistry professor Joseph Gardella at the State University of New York at Buffalo.

"It runs from everything as simple as blackened teeth to these very brittle bones, bone deformation, so that leads to very debilitating disability," he said in a telephone interview. "And the rates of skeletal fluorosis in some of the villages are as high as 30 percent, although not all of those people who suffer are suffering the most extreme disability."

The most common source of fluoride disease is water pollution. But tests found no problem with the villages' water, so scientists started looking for another environmental source of fluoride.

Coal, which is burned for heating and cooking, was another suspect, but the coal itself wasn't polluted. However, advanced imaging techniques revealed that the culprit was another material burned with the coal.

"These are villagers that will collect what coal is available. And it turns out that they form briquettes, coal briquettes to burn, by mixing it with surface clay. And what we've learned is that the fluorine, as fluoride, is associated with this clay component," Gardella said.

The scientist says it's unclear exactly how the village residents were being poisoned by the fluoride. They might be breathing in the chemical, which is an ion of the element fluorine. Or it might be in tiny particles that settle on food.

"We were able to obtain dried peppers and dried corn samples from the villages and show that the particulate matter on the surfaces of these chili peppers was really high in fluorine content."

Either way, says University at Buffalo scientist Joseph Gardella, the Chinese government has launched a program to install chimneys to vent the harmful fluoride out of villagers' homes.

Results of the research were presented in Albuquerque, New Mexico, at the International Symposium of the AVS, the scientific group formerly known as the American Vacuum Society.  

You May Like

At Khmer Rouge Court, Long-Awaited Verdict Approaches

First phase of trial, which is coming to an end, has focused on forced exodus of Phnom Penh in 1975 - and now many are hopeful justice will be served More

Video When Fighting Eases, Gazans Line Up at Bakeries

When there is a lull in the conflict, residents who have been hunkered down in their apartments rush out to stock up on food and other necessities More

Video Information War Rages Alongside Real One in Ukraine

Downing of Malaysian airliner, allegations of cross-border shelling move information war in war-torn country to a new level More

This forum has been closed.
Comments
     
There are no comments in this forum. Be first and add one

Featured Videos

Your JavaScript is turned off or you have an old version of Adobe's Flash Player. Get the latest Flash player.
Information War Rages Alongside Real One in Ukrainei
X
Al Pessin
July 31, 2014 8:13 PM
The downing of the Malaysian airliner two weeks ago, and allegations that Russians are shelling Ukrainian troops across the border, have moved the information war swirling around the Ukrainian conflict to a new level. VOA's Al Pessin reports from Kyiv.
Video

Video Information War Rages Alongside Real One in Ukraine

The downing of the Malaysian airliner two weeks ago, and allegations that Russians are shelling Ukrainian troops across the border, have moved the information war swirling around the Ukrainian conflict to a new level. VOA's Al Pessin reports from Kyiv.
Video

Video When Fighting Eases, Gazans Line Up at Bakeries

When there is a lull in the conflict in Gaza, residents who have been hunkered down in their apartments rush out to stock up on food and other necessities. Probably the most important destination is the local bakery. VOA’s Scott Bobb reports from Gaza City.
Video

Video US-Funded Program Offers Honduran Children Alternative to Illegal Immigration

President Obama and Central American leaders recently agreed to come up with a plan to address poverty and crime in the region that is fueling the surge of young migrants trying to illegally enter the United States. VOA’s Brian Padden looks at one such program in Honduras - funded in part by the United States - which gives street kids not only food and safety but a chance for a better life without, crossing the border.
Video

Video 'Fab Lab' Igniting Revolution in Kenya

The University of Nairobi’s Science and Technology Park is banking on 3-D prototyping to spark a manufacturing revolution in the country. Lenny Ruvaga has more for from Nairobi's so-called “FabLab” for VOA.
Video

Video Gazans in Shelled School Sought Shelter

Israel's air and ground assault against Hamas-led fighters in Gaza has forced many Palestinians to flee their homes, seeking safety. But safe places are hard to find, as VOA’s Scott Bobb reports from Jabaliya.
Video

Video Rapid Spread of Ebola in West Africa Prompts Global Alert

Across West Africa, health officials are struggling to keep up with what the World Health Organization describes as the worst ebola outbreak on record. The virus has killed hundreds of people this year. U.S. President Barack Obama and other world leaders are watching the developments closely as they weigh what actions, if any, are needed to help contain the disease.
Video

Video Michelle Obama: Young Africans Need to Embrace Women's Rights

U.S. first lady Michelle Obama urged some of Africa's best and brightest to advocate for women's rights in their home countries. As VOA's Pam Dockins explains, Obama spoke to some 500 participants of the Young African Leaders Initiative, a six-week U.S.-based training and development program.
Video

Video Immigrant Influx on Texas Border Heats Up Political Debate

Immigrants from Central America continue to cross the U.S.-Mexico border in south Texas, seeking asylum in the United States, as officials grapple with ways to deal with the problem and provide shelter for thousands of minors among the illegal border crossers. As VOA's Greg Flakus reports from Houston, the issue is complicated by internal U.S. politics and U.S. relations with the troubled nations that immigrants are fleeing.
Video

Video Study: Latino Students Most Segregated in California

Even though legal school segregation ended in the United States 60 years ago, one study finds segregation still occurs in the U.S. based on income and race. The University of California Los Angeles Civil Rights Project finds that students in California are more segregated by race than ever before, especially Latinos. Elizabeth Lee reports for VOA from Los Angeles.

AppleAndroid