NDLI: Occurrence of glyphosate and acidic herbicides in select urban rivers and streams in Canada, 2007.

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Occurrence of glyphosate and acidic herbicides in select urban rivers and streams in Canada, 2007.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Cagampan, Steve J. Murray, Janine L. Donald, David B. Cessna, Allan J. Sekela, Mark A. Sverko, Ed Glozier, Nancy E. Murphy, Clair Struger, John Gledhill, Melissa Rondeau, Myriam Ernst, William R.
Spatial Coverage	Canada
Description	Author Affiliation: Glozier NE ( Water Science and Technology Directorate, Environment Canada, National Hydrology Research Centre, 11 Innovation Boulevard, Saskatoon, SK, Canada, S7N 3H5. Nancy.Glozier@ec.gc.ca)
Abstract	INTRODUCTION: Public and scientific concern has grown over the last decade in Canada over the cosmetic use of pesticides in urban centers. With this in mind, a national survey was designed to monitor eight commonly used herbicides in urban rivers and streams across Canada. MATERIALS AND METHODS: To coordinate sample collections across the country, samples were collected monthly on one of two predetermined dates from April to September, 2007 from 19 sites within 16 watersheds, including 15 sites downstream of urban lands and two reference sites. Water samples were also collected approximately three times from each watershed during or after precipitation events. All samples were collected using a common sampling protocol and all were analyzed using the same analytical laboratories. RESULTS AND DISCUSSION: The herbicides 2,4-D, mecoprop, dicamba, glyphosate and its major metabolite aminomethylphosphonic acid (AMPA) were most frequently detected. Using either herbicide concentrations upstream/downstream of urban centers or bromoxynil and clopyralid as indictors of agricultural inputs of herbicides to streams, it was clear that environmental concentrations of these herbicides downstream of urban areas were linked to urban use in Canada. Herbicide concentrations in streams draining urban areas were greater during or after significant rainfall events and, with the exception of glyphosate, were significantly greater in the Province of Ontario. Herbicide concentrations were not correlated to the proportion of the watersheds in urban land use. Also, there was no difference in seasonal patterns of herbicide concentrations across urban centers when grouped in five geographic areas. None of the herbicide concentrations measured exceeded existing Canadian Water Quality Guidelines for the protection of aquatic life. CONCLUSIONS: This is the first time a national survey of pesticides in urban rivers has been carried out in a consistent fashion across Canada. Concentrations of 2,4-D, mecoprop, dicamba, glyphosate, and AMPA were linked to urban use and frequently detected in all geographic areas. However, geographic differences in concentration suggested differences in usage or stream connectivity patterns among urban centers. Some jurisdictions in Canada have recently restricted cosmetic use of pesticides and it would be interesting to determine whether such restrictions will lead to reduced pesticide concentrations in urban streams.
ISSN	09441344
Issue Number	3
Volume Number	19
e-ISSN	16147499
Journal	Environmental Science and Pollution Research
Language	English
Publisher	Springer
Publisher Date	2012-03-01
Publisher Place	Germany
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Glycine Analogs & Derivatives Herbicides Analysis Rivers Chemistry Water Pollutants, Chemical 2,4-dichlorophenoxyacetic Acid 2-methyl-4-chlorophenoxyacetic Acid Canada Chemical Phenomena Dicamba Hydrogen-ion Concentration Organophosphonates Pilot Projects Seasons Urbanization Water Quality Comparative Study Journal Article Research Support, Non-u.s. Gov't Discipline Environmental Science Discipline Environmental Chemistry
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Health, Toxicology and Mutagenesis Pollution Medicine

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Occurrence of glyphosate and acidic herbicides in select urban rivers and streams in Canada, 2007

Treatment of 2,4-D, mecoprop, and dicamba using membrane bioreactor technology.

Dissipation of six acid herbicides in water and sediment of two Canadian prairie wetlands.

Comparison of concentrations and stereoisomer ratios of mecoprop, dichlorprop and metolachlor in Ontario streams, 2006-2007 vs. 2003-2004.

Evidence for behavioral preference toward environmental concentrations of urban-use herbicides in a model adult fish.

Factors responsible for rapid dissipation of acidic herbicides in the coastal lagoons of the Camargue (Rhône River Delta, France).

Sources of aminomethylphosphonic acid (AMPA) in urban and rural catchments in Ontario, Canada: Glyphosate or phosphonates in wastewater?

Reverse micelle-mediated dispersive liquid-liquid microextraction of 2,4-dichlorophenoxyacetic acid and 4-chloro-2-methylphenoxyacetic acid.

Study on the degradation of 2,4-dichlorophenoxyacetic acid (2,4-D) and 2-methyl-4-chloro-phenoxyacetic sodium (MCPA sodium) in natural agriculture-soils of Fuzhou, China using capillary electrophoresis.

Occurrence of glyphosate and acidic herbicides in select urban rivers and streams in Canada, 2007.

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Occurrence of glyphosate and acidic herbicides in select urban rivers and streams in Canada, 2007

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Occurrence of glyphosate and acidic herbicides in select urban rivers and streams in Canada, 2007.