{"id":121428,"date":"2019-06-05T04:00:29","date_gmt":"2019-06-05T04:00:29","guid":{"rendered":"https:\/\/www.bnreport.com\/chemicals-in-biodegradable-food-containers-can-leach-into-compost\/"},"modified":"2019-06-05T04:00:29","modified_gmt":"2019-06-05T04:00:29","slug":"chemicals-in-biodegradable-food-containers-can-leach-into-compost","status":"publish","type":"post","link":"https:\/\/www.bnreport.com\/en\/chemicals-in-biodegradable-food-containers-can-leach-into-compost\/","title":{"rendered":"Chemicals in biodegradable food containers can leach into compost"},"content":{"rendered":"<p>Composting biodegradable food containers cuts the amount of trash that gets sent to a landfill. But the practice may serve up some unintended consequences for human health.<\/p>\n<p>Thats because the items often contain perfluoroalkyl and polyfluoroalkyl substances, or PFAS, to help repel water and oil. These <a href=\"https:\/\/pubs.acs.org\/doi\/full\/10.1021\/acs.estlett.9b00280\" rel=\"noreferrer noopener\" target=\"_blank\">persistent chemicals can leach out of the packaging and end up in compost<\/a>, researchers report May 29 in <em>Environmental Science &amp; Technology Letters<\/em>. When that compost is used, PFAS could be taken up by plants and ultimately accumulate in the bodies of people, though the health effects are still unclear.<\/p>\n<p>The scientists measured perfluoroalkyl acids, or PFAAs, a subset of PFAS formed by microbial degradation, in compost from 10 commercial facilities. Seven of these facilities accepted compostable food containers, and three didnt. With the food containers in the mix, the team measured PFAAs at concentrations from about 29 to 76 micrograms per kilogram of compost, while compost from facilities that didnt accept the containers contained less than 8 micrograms PFAAs per kilogram of compost.<\/p>\n<h4>Chemical buildup[hhmc]<br \/>\n<\/h4>\n<p>Municipal composts from facilities that accept biodegradable food containers (blue) had much higher levels of PFAS than facilities that dont accept the items (orange). The persistent chemicals leach out of these containers and can end up in the compost.<\/p>\n<p><strong>PFAS in compost from facilities that do and dont accept biodegradable food containers<\/strong><\/p>\n<p>\u201cThere was a huge difference in the PFAS levels between those two groups,\u201d says Laurel Schaider, an environmental chemist and public health researcher at Silent Spring Institute in Newton, Mass., not involved in the study. People expect the things they compost to break down entirely and become a sustainable source of nutrients for plants, so its concerning that chemicals in compostable items can persist, she says.<\/p>\n<p>As a class, PFAS include thousands of compounds, many with useful properties. They show up in flame-retardant carpets, in nonstick coatings on cookware and myriad other places. \u201cEverybodys happy to have all those conveniences, but the trade-off \u2026 is pretty huge because [the compounds] dont go away,\u201d says Linda Lee, an environmental fate chemist at Purdue University in West Lafayette, Ind. Microbes can usually help break down chemicals in general, but for this persistent bunch, the organisms typically transform the compounds into other PFAS.<\/p>\n<p>A chain of carbon forms the backbone of PFAS to which fluorine atoms are attached. Lee and colleagues found that most of the PFAS in compost samples were shorter-chain ones rather than more notorious, longer-chained perfluorooctanoic acid, or PFOA, and perfluorooctanesulfonic acid, or PFOS, which have been largely phased out in the United States. Shorter-chain PFAS dont hang out as long in the body as their longer cousins, but they can more easily move from organic material in soil to water and be taken up by plants.<\/p>\n<p>Studies have linked PFAS to negative health effects including<a href=\"https:\/\/www.sciencenews.org\/article\/pfas-chemicals-biodegradable-food-containers-compost\" rel=\"noreferrer noopener\" target=\"_blank\"><strong>Read More \u2013 Source<\/strong><\/a><br \/>\n[contf]<br \/>\n[contfnew]<br \/>\n        <img decoding=\"async\" src=\"https:\/\/www.sciencenews.org\/profiles\/sn\/themes\/science_news\/logo.png\" \/><\/p>\n<h5><a href=\"https:\/\/app.newswirenow.co.uk\/www.sciencenews.org\" rel=\"noreferrer noopener\" target=\"_blank\">science news<\/a><\/h5>\n<p>[contfnewc]<br \/>\n[contfnewc]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Composting biodegradable food containers cuts the amount of trash that gets sent to a landfill. But ..<\/p>\n","protected":false},"author":1,"featured_media":121429,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[49],"tags":[],"class_list":["post-121428","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-science"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Chemicals in biodegradable food containers can leach into compost - Business News Report<\/title>\n<meta name=\"description\" content=\"Composting biodegradable food containers cuts the amount of trash that gets sent to a landfill. 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