{"id":3228,"date":"2010-03-04T01:13:07","date_gmt":"2010-03-04T05:13:07","guid":{"rendered":"https:\/\/www.beyondpesticides.org\/dailynewsblog\/?p=3228"},"modified":"2010-03-04T01:13:07","modified_gmt":"2010-03-04T05:13:07","slug":"new-study-finds-nanosilver-products-toxic-to-fish","status":"publish","type":"post","link":"https:\/\/beyondpesticides.org\/dailynewsblog\/2010\/03\/new-study-finds-nanosilver-products-toxic-to-fish\/","title":{"rendered":"New Study Finds Nanosilver Products Toxic to Fish"},"content":{"rendered":"

(Beyond Pesticides<\/em>, March 4, 2010) Scientists at Purdue University have found that nanosilver that is sonicated or suspended in solution is toxic and even lethal to fathead minnows, an organism that is often used to measure toxicity on aquatic life. The study is the latest research to demonstrate the need for federal regulatory agencies to regulate emerging nanotechnologies as a unique pesticide. <\/p>\n

The study, \u201cThe effects of silver nanoparticles on fathead minnow (Pimephales promelas) embryos<\/a>,\u201d led by Maria Sep\u00falveda, PhD and published in Ecotoxicology<\/em>, describes the toxicity of two commercial silver nanoparticle products: NanoAmor<\/a> and Sigma<\/a>.<\/p>\n

Fathead minnows at several stages of their development were exposed to varying concentrations of either suspended or stirred nanoparticle solutions for 96 hours. When the nanosilver was allowed to settle, the solution became several times less toxic, but still caused malformations in the minnows. With or without sonication, nanosilver caused irregularities, including head hemorrhages and edema, and was ultimately lethal. <\/p>\n

\u201cSilver nitrate is a lot more toxic than nanosilver, but when nanosilver was sonicated, or suspended, its toxicity increased tenfold,\u201d said Dr. Sep\u00falveda. \u201cThere is reason to be concerned.\u201d<\/p>\n

Using Transmission Electron Microscopy, Dr. Sep\u00falveda was able to detect nanosilver particles measuring 30 nanometers or less inside the minnow embryos. Thirty nanometers is more than 3,000 times smaller than the diameter of a human hair.<\/p>\n

\"\"<\/p>\n

\u201cThese nanosilver particles are so small they are able to cross the egg membranes and move into the fish embryos in less than a day,\u201d said Dr. Sepulveda. \u201cThey had a potentially high dose of silver in them.\u201d<\/p>\n

Silver nanoparticles are now widely impregnated into a wide variety of consumer products<\/a> used to kill off bacteria in odor-control clothing, bedding, vacuums, baby and infant products, food packaging and a host of others. However, very little is known about where these particles end up when such products are put to use, and little work is being done to estimate the current level of nanosilver being released into the environment. <\/p>\n

Scientists have concluded that nanoparticles can pass easily into cells and affect cellular function, depending on their shape and size. Preliminary research with laboratory rats has found that silver nanoparticles can traverse into the brain, and can induce neuronal degeneration and necrosis (death of cells or tissue) by accumulating in the brain over a long period of time. A study conducted in 2008<\/a> and confirmed by another study in 2009<\/a> showed that washing nano-silver textiles released substantial amounts of the nanosilver into the laundry discharge water, which will ultimately reach natural waterways and potentially poison fish and other aquatic organisms. <\/p>\n

In May, 2008, a legal petition<\/a> was filed by the International Center for Technology Assessment (ICTA), the Center for Food Safety, Friends of the Earth, and others including Beyond Pesticides, challenging EPA\u2019s failure to regulate nanosilver as a unique pesticide. The 100-page petition addresses the serious human health concerns raised by these unique substances, as well as their potential to be highly destructive to natural environments, and calls on the EPA to fully analyze the health and environmental impacts of nanotechnology, and require labeling of all products.<\/p>\n

So far, the U.S. federal government has invested only a small percentage of its overall nanotechnology research funding to understand the risks posed by nanomaterials, according to an analysis<\/a> conducted last year by Project on Emerging Nanotechnologies, further highlighting the need for more research on the potential risks posed by nanomaterials.<\/p>\n

Dr. Sep\u00falveda said she plans to develop tests to understand the effect that different nanoparticles have on fish and other organisms. She also wants to develop testing to determine nanosilver concentrations in the environment. \u201cHow are we going to know the risk unless we know the concentration of these particles?\u201d she said. <\/p>\n

For more information, download Beyond Pesticides factsheet “What\u2019s the right answer to the germ question<\/a>?” Or, for more information, including tips on how to get toxic antimicrobials out of your home, school, office or community, visit Beyond Pesticides\u2019 Antimicrobials program page<\/a>. <\/p>\n

Source: Purdue University Press Release<\/a><\/em><\/p>\n

<\/font><\/p>\n","protected":false},"excerpt":{"rendered":"

(Beyond Pesticides, March 4, 2010) Scientists at Purdue University have found that nanosilver that is sonicated or suspended in solution is toxic and even lethal to fathead minnows, an organism that is often used to measure toxicity on aquatic life. The study is the latest research to demonstrate the need for federal regulatory agencies to regulate emerging nanotechnologies as a unique pesticide. The study, \u201cThe effects of silver nanoparticles on fathead minnow (Pimephales promelas) embryos,\u201d led by Maria Sep\u00falveda, PhD and published in Ecotoxicology, describes the toxicity of two commercial silver nanoparticle products: NanoAmor and Sigma. Fathead minnows at several stages of their development were exposed to varying concentrations of either suspended or stirred nanoparticle solutions for 96 hours. When the nanosilver was allowed to settle, the solution became several times less toxic, but still caused malformations in the minnows. With or without sonication, nanosilver caused irregularities, including head hemorrhages and edema, and was ultimately lethal. \u201cSilver nitrate is a lot more toxic than nanosilver, but when nanosilver was sonicated, or suspended, its toxicity increased tenfold,\u201d said Dr. Sep\u00falveda. \u201cThere is reason to be concerned.\u201d Using Transmission Electron Microscopy, Dr. Sep\u00falveda was able to detect nanosilver particles measuring 30 nanometers […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[90,12],"tags":[],"class_list":["post-3228","post","type-post","status-publish","format-standard","hentry","category-nanotechnology","category-water"],"yoast_head":"\nNew Study Finds Nanosilver Products Toxic to Fish - Beyond Pesticides Daily News Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/beyondpesticides.org\/dailynewsblog\/2010\/03\/new-study-finds-nanosilver-products-toxic-to-fish\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"New Study Finds Nanosilver Products Toxic to Fish - Beyond Pesticides Daily News Blog\" \/>\n<meta property=\"og:description\" content=\"(Beyond Pesticides, March 4, 2010) Scientists at Purdue University have found that nanosilver that is sonicated or suspended in solution is toxic and even lethal to fathead minnows, an organism that is often used to measure toxicity on aquatic life. The study is the latest research to demonstrate the need for federal regulatory agencies to regulate emerging nanotechnologies as a unique pesticide. The study, \u201cThe effects of silver nanoparticles on fathead minnow (Pimephales promelas) embryos,\u201d led by Maria Sep\u00falveda, PhD and published in Ecotoxicology, describes the toxicity of two commercial silver nanoparticle products: NanoAmor and Sigma. Fathead minnows at several stages of their development were exposed to varying concentrations of either suspended or stirred nanoparticle solutions for 96 hours. When the nanosilver was allowed to settle, the solution became several times less toxic, but still caused malformations in the minnows. With or without sonication, nanosilver caused irregularities, including head hemorrhages and edema, and was ultimately lethal. \u201cSilver nitrate is a lot more toxic than nanosilver, but when nanosilver was sonicated, or suspended, its toxicity increased tenfold,\u201d said Dr. Sep\u00falveda. \u201cThere is reason to be concerned.\u201d Using Transmission Electron Microscopy, Dr. Sep\u00falveda was able to detect nanosilver particles measuring 30 nanometers […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/beyondpesticides.org\/dailynewsblog\/2010\/03\/new-study-finds-nanosilver-products-toxic-to-fish\/\" \/>\n<meta property=\"og:site_name\" content=\"Beyond Pesticides Daily News Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/beyondpesticides\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/beyondpesticides\/\" \/>\n<meta property=\"article:published_time\" content=\"2010-03-04T05:13:07+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.beyondpesticides.org\/antibacterial\/nanoscale%20final2.jpg\" \/>\n<meta name=\"author\" content=\"Beyond Pesticides\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@ByondPesticides\" \/>\n<meta name=\"twitter:site\" content=\"@ByondPesticides\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Beyond Pesticides\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/beyondpesticides.org\/dailynewsblog\/2010\/03\/new-study-finds-nanosilver-products-toxic-to-fish\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/beyondpesticides.org\/dailynewsblog\/2010\/03\/new-study-finds-nanosilver-products-toxic-to-fish\/\"},\"author\":{\"name\":\"Beyond Pesticides\",\"@id\":\"https:\/\/beyondpesticides.org\/dailynewsblog\/#\/schema\/person\/1b5c0a0981b549cc5b628770073031f4\"},\"headline\":\"New Study Finds Nanosilver Products Toxic to Fish\",\"datePublished\":\"2010-03-04T05:13:07+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/beyondpesticides.org\/dailynewsblog\/2010\/03\/new-study-finds-nanosilver-products-toxic-to-fish\/\"},\"wordCount\":672,\"commentCount\":3,\"publisher\":{\"@id\":\"https:\/\/beyondpesticides.org\/dailynewsblog\/#organization\"},\"image\":{\"@id\":\"https:\/\/beyondpesticides.org\/dailynewsblog\/2010\/03\/new-study-finds-nanosilver-products-toxic-to-fish\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.beyondpesticides.org\/antibacterial\/nanoscale%20final2.jpg\",\"articleSection\":[\"Nanotechnology\",\"Water\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/beyondpesticides.org\/dailynewsblog\/2010\/03\/new-study-finds-nanosilver-products-toxic-to-fish\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/beyondpesticides.org\/dailynewsblog\/2010\/03\/new-study-finds-nanosilver-products-toxic-to-fish\/\",\"url\":\"https:\/\/beyondpesticides.org\/dailynewsblog\/2010\/03\/new-study-finds-nanosilver-products-toxic-to-fish\/\",\"name\":\"New Study Finds Nanosilver Products Toxic to Fish - 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The founders, who established Beyond Pesticides (originally as National Coalition Against the Misuse of Pesticides) as a nonprofit membership organization in 1981, felt that without the existence of such an organized, national network, local, state and national pesticide policy would become, under chemical industry pressure, increasingly unresponsive to public health and environmental concerns. Beyond Pesticides believes that people must have a voice in decisions that affect them directly. We believe decisions should not be made for us by chemical companies or by decision-makers who either do not have all of the facts or refuse to consider them. Learn more about our work, read A Year in Review\u20142021, our accomplishments are your victories! Beyond Pesticides seeks to protect healthy air, water, land, and food for ourselves and future generations. By forging ties with governments, nonprofits, and people who rely on these natural resources, we reduce the need for unnecessary pesticide use and protect public health and the environment. Beyond Pesticides provides hands-on services to the public and supports local action by: identifying and interpreting hazards; and, designing safe pest management programs. With the information provided by Beyond Pesticides, people may not only be able to make informed choices and adopt practices that protect themselves and their families from unnecessary exposure to pesticides, but they will be able to effect changes on community-wide pest management decisions and policies that govern pesticide use, such as pesticide uses in parks, schools, for community insect control and along roadsides. 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