Exposure of pregnant women to polybrominated diphenyl ether flame retardants can reduce children's IQ
August 07, 2017 Source: Xinhua News Agency
Window._bd_share_config={ "common":{ "bdSnsKey":{ },"bdText":"","bdMini":"2","bdMiniList":false,"bdPic":"","bdStyle":" 0","bdSize":"16"},"share":{ }};with(document)0[(getElementsByTagName('head')[0]||body).appendChild(createElement('script')) .src='http://bdimg.share.baidu.com/static/api/js/share.js?v=89860593.js?cdnversion='+~(-new Date()/36e5)];Polybrominated diphenyl ethers are a group of diphenyl ether mixtures with different numbers of bromine atoms. They are often used as flame retardants in household products such as furniture. It has long been known that such substances are harmful to health. A recent study in the United States found that exposure to PBDEs in pregnant women can damage a child's intelligence and lead to a lower IQ.
Researchers at the University of California, San Francisco, analyzed nearly 3,000 pairs of mother and child data from around the world and found sufficient evidence to support the impact of PBDEs on IQ. According to a study published in the monthly "Environmental State Watch" magazine, the more exposure to PBDE in pregnant women, the lower the IQ of children. For every 10 times increase in PBDE levels in mothers, the IQ of children decreased by 3.7 points.
Researchers say that a 3.7 point drop in IQ may not seem too much, but from a population perspective, this means that more children need early intervention, and their families may face personal and financial burdens.
In the 1970s, PBDEs began to be widely used in California through fire safety standards for some products such as furniture. As more and more evidence shows that PBDEs are harmful to humans, since 2003, California and other states in the United States have successively approved a ban on the use or phasing out of some of the most common PBDEs.
Researchers say that although bans and restrictions on PBDE have been introduced, the problem is that people are still in contact. This chemical flame retardant is easy to adhere to dust, waste furniture and electronic equipment, and is continuously released into the environment, eventually entering people's food and body, with children at greatest risk.
In addition, PBDEs are superimposed with other toxic chemicals contained in building materials, pesticides, etc., which may cause serious chemical mixing effects, which are not taken into account by current environmental regulations.
Researchers hope that this research will sound a wake-up call for decision makers responsible for environmental and human health issues. Policymakers should learn from the use of PBDEs and recognize that persistent hazardous chemicals should not be added to household products from the start. in.
Polybrominated diphenyl ethers are a class of organic pollutants that are widely found in the environment. There are theoretically 209 homologues. Due to the stable presence of such substances in the environment, the United Nations Environment Programme officially included tetrabromodiphenyl ether, pentabromodiphenyl ether, hexabromodiphenyl ether and heptabromodiphenyl ether in 2009 to reduce toxic and harmful chemicals. The Stockholm Convention for the use of products has been completely and completely discontinued. (Reporter Ma Dan)
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