Navigation Links
Tracking triclosan's field footprint

This release is available in Spanish.

A study by U.S. Department of Agriculture (USDA) scientists and cooperators provides new details about how fertilizing soils with biosolids also introduces triclosanan antibacterial agent in soaps and other cleaning suppliesinto the environment.

Farmers add "Class B" biosolids, also known as treated wastewater solids, to their fields as a fertilizer. These biosolids meet federal regulations for human health and safety, but little information has been obtained about their triclosan levels. Triclosan has not been identified as a human health hazard, but the U.S. Food and Drug Administration is currently conducting a scientific and regulatory review of the compound.

For this project, Agricultural Research Service (ARS) chemist Clifford Rice, in the ARS Environmental Management and Byproducts Utilization Laboratory in Beltsville, Md., partnered with University of Maryland engineers Nuria Lozano and Alba Torrents. District of Columbia Water and Sewer Authority scientist Mark Ramirez also contributed to the study. ARS is USDA's principal intramural scientific research agency.

The scientists determined that triclosan levels in Class B biosolids from a Mid-Atlantic wastewater treatment plant averaged around 15.5 milligrams per kilogram. They then collected surface soil samples from 26 farms in northern Virginia, mostly from pastures. Some fields had never been amended with biosolids and others had been amended with from one to four applications of biosolids within the previous 9 months to 13 years. Most of the biosolid amendments came from the wastewater treatment plant in the study.

The researchers found farms that had not received biosolid applications had background triclosan levels that peaked at 4.5 nanograms per gram of dried soil. Farms that had received single and multiple biosolid applications also had low triclosan levels, but the concentrations varied from 3.1 to 66.6 nanograms per gram. (One billion nanograms are in one gram.) The results also suggested biological degradation of triclosans in the soils that had been amended with biosolids resulted in the loss of 78 percent of the triclosan after 7 to 9 months, and that up to 96 percent was removed after 16 months.

Results from this study, which were published in Chemosphere in 2010, provide baseline data about triclosan levels in treated biosolids and in agricultural fields that have been amended with biosolids--information that can help support future studies of triclosans in the environment.


Contact: Ann Perry
United States Department of Agriculture-Research, Education, and Economics

Related biology news :

1. Census of Marine Life program tracking animals on Pacific continental shelf
2. Electronic tracking system can improve follow-up after an abnormal Pap test
3. Nanotech medicine, tumor tracking, new technologies and more
4. Genome signatures enable tracking of algal complexity
5. Geisinger Implements MedEx System to Enhance Medication Delivery, Tracking
6. Tracking phosphorus runoff from livestock manure
7. Tracking coral larvae to understand Hawaii reef health
8. Improved near-real-time tracking of 2010 El Niño reveals marine life reductions
9. Tracking new cancer-killing particles with MRI
10. Scientists put interactive flu tracking at publics fingertips
11. Tracking down the human odorprint
Post Your Comments:
(Date:3/23/2016)... 2016 Einzigartige ... und Stimmerkennung mit Passwörtern     ... MESG ), ein führender Anbieter digitaler Kommunikationsdienste, ... SpeechPro zusammenarbeitet, um erstmals dessen Biometrietechnologie einzusetzen. ... Möglichkeit angeboten, im Rahmen mobiler Apps neben ...
(Date:3/22/2016)... and SANDY, Utah , March ... operates the highest sample volume laboratory in ... and UNIConnect, leaders in clinical sequencing informatics and molecular ... of a project to establish the informatics infrastructure for ... NSO has been contracted by the Ontario Ministry ...
(Date:3/18/2016)... LONDON , March 18, 2016 ... Established Suppliers of Biometrics, ICT, Manned & Unmanned Vehicles, Physical ... & security companies in the border security market and ... and Europe has led ... your companies improved success. --> defence & ...
Breaking Biology News(10 mins):
(Date:6/27/2016)... ... June 27, 2016 , ... ... Amgen, will join the faculty of the University of North Carolina Kenan-Flagler ... of strategy and entrepreneurship at UNC Kenan-Flagler, with a focus on the school’s ...
(Date:6/24/2016)... discussions on a range of subjects including policies, debt and ... Poloz. Speaking at a lecture to the Canadian ... to the country,s inflation target, which is set by both ... "In certain areas there needs to be ... why not sit down and address strategy together?" ...
(Date:6/24/2016)... ... ... Researchers at the Universita Politecnica delle Marche in Ancona combed medical journal articles ... findings are the subject of a new article on the Surviving Mesothelioma website. ... blood, lung fluid or tissue of mesothelioma patients that can help point doctors to ...
(Date:6/23/2016)... , June 23, 2016   Boston ... of novel compounds designed to target cancer stemness ... has been granted Orphan Drug Designation from the ... treatment of gastric cancer, including gastroesophageal junction (GEJ) ... inhibitor designed to inhibit cancer stemness pathways by ...
Breaking Biology Technology: