Monday, March 11, 2019

Why kids may be at risk from vinyl floors and fire-resistant couches

vinyl flooring

We learn again that all our plastics do out gas and that we do get exposed and this may not be good.  The low levels encountered do tell us that the risk may well be non existent.  Those stats are basically garbage and are bordering on false positives.
I suspect that if i sample the soil in your lawn i can establish levels for arsenic and many others.  It is just that low levels are easily disposed of by our livers.  There is really nothing to see here and smacks of another environmental screed whose love of garbage lab work is well known.

Everyone should have the pleasure of reviewing stacks of mineral assay sheets in the hope of finding any hope at all and seeing every element represented and it is all meaningless.

In the event, we are not told why PBDE's in low concentration is risky or even how risky.  Recall it has taken Monsanto sixty years to been forced to accept that low levels of roundup is not your friend.  During that era the environmental crowd was completely silent.  I was saying more a mere decade ago.  Recall that they remained  silent until really just recently when the published science became unavoidable.

Why kids may be at risk from vinyl floors and fire-resistant couches

Chemicals called semivolatile organic compounds have been linked to health problems

6:00am, February 21, 2019
DOMESTIC CHEMICALS  Children who grow up in houses with all vinyl flooring or living room sofas that contain flame retardants called PBDEs have higher levels of potentially harmful chemicals in their bodies than other kids, a study finds. 

WASHINGTON — Home decor like furniture and flooring may not be notorious polluters like gas-guzzlers, but these indoor consumer products can also be significant sources of potentially dangerous chemicals.

Kids who live in homes with all vinyl flooring or living room couches that contain flame retardants have much higher concentrations of chemicals called semivolatile organic compounds in their blood and urine than other children. Researchers reported those results February 17 at the annual meeting of the American Association for the Advancement of Science.

Manufacturers commonly use semivolatile organic compounds, such as plasticizers and flame retardants, to make electronics, furniture and other household trappings (SN: 11/14/15, p. 10). “Many of these chemicals have been implicated in adverse health outcomes in children — things like ADHD, autism … even cancer,” environmental health researcher Heather Stapleton of Duke University said in a news conference. “It’s important that we understand the primary sources of these chemicals in the home.” 

Stapleton and her colleagues investigated the in home exposure to semivolatile organic compounds of 203 children ages 3 to 6. The team collected dust and air samples, along with small pieces of items like couch cushions, from the kids’ homes. The researchers also gathered urine and blood samples from the children.

Children living in homes with all vinyl flooring had concentrations of a by-product of the plasticizer benzyl butyl phthalate in their urine of about 240 nanograms per milliliter on average. Meanwhile, kids living in homes with no vinyl flooring had only about 12 nanograms per milliliter on average. Children with the highest exposure showed 20 to 40 percent of the “reference dose” for benzyl butyl phthalate — that is, the highest daily dose that the U.S. Environmental Protection Agency considers safe to ingest without negative consequences over a person’s lifetime.

The benzyl butyl phthalate exposures that Stapleton’s team found were lower than the EPA’s safety threshold. But it’s unclear how the levels of this chemical in children’s bodies would change over the course of several more years, Stapleton says. Contact with benzyl butyl phthalate has been linked to respiratory and reproductive disorders.

Children from homes with living room sofas that contain flame-retardant polybrominated diphenyl ethers, or PBDEs, had concentrations of these compounds in their blood serum of about 108 parts per billion on average — about seven  times higher than other kids. Stapleton’s team still needs to assess how these concentrations compare with the EPA’s reference dose. Exposure to PBDEs has been linked to several cognitive problems, such as lower IQ and hyperactivity, as well as cancer and other diseases.

Glenn Morrison, an environmental engineer at the University of North Carolina in Chapel Hill not involved in the work, says that in retrospect, it makes sense that Stapleton’s team found evidence of semivolatile organic compounds in children’s bodies. But for a long time, there has been a “tacit assumption” among researchers that home furnishings don’t release these compounds quickly enough for them to significantly accumulate in residents’ bodies, he says.  The new findings undercut that assumption.

Showering and washing clothing more frequently may curb people’s susceptibility to picking up these chemicals, Morrison says, but “there’s a limit to how well those things work.” Ideally, indoor consumer products should be free of dangerous chemical ingredients, he says. A better understanding of how semivolatile organic compounds build up in the body may inform regulations on which chemicals can be used to make household products, or help customers make better decisions about healthy, safe choices.

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