Transport and attenuation of dissolved glyphosate and AMPA in a stormwater wetland

From laboratory to environmental conditions: a new approach for chemical’s biodegradability assessment

“…The probability of the Biodegradation Index with 95 % confidence limits is estimated at 0.036 (0.005, 0.15), which suggest that glyphosate has the same hazardous profile as atrazine. Our conclusions are in full agreement with those of other scientific reviews and articles on the same subject; glyphosate can be considered biodegradable (Imfeld et al 2013), but its biodegradation profile can quickly change depending on the geographical (Borggaard and Gimsing 2008) and climatic (Helander et al 2012) variations and can present the risk of persistence.…”

Physico-chemical characteristics affect the spatial distribution of pesticide and transformation product loss to an agricultural brook

“…An example of a PC with a low export (PC 10) would be Glyphosate. The estimated f exp = 0.1% for PC 10 is close to values reported by Imfeld et al (2013) for Glyphosate export in a small vineyard catchment where most of the area was treated with Glyphosate. Scenarios 6d and 7d have physico-chemical characteristics close to the formerly in the catchment applied herbicide Metolachlor which is, among others, transformed into Metolachlor ESA.…”

“…Although buffer strips were existing in the Ror catchment in 2000 this fact could not be considered in this study due to the relatively coarse spatial resolution (20 m) of model. Therefore, it is unlikely that the calculated 15% PC export would be found in the real world which is affirmed by field studies finding up to 1-5% of applied herbicide mass in the river (Louchart et al, 2001;Shipitalo and Owens, 2003;Leu et al, 2004a;Imfeld et al, 2013). An example of a PC with a low export (PC 10) would be Glyphosate.…”

Regulation of diffuse pesticide pollution: Combining point source reduction and mitigation in stormwater wetland (Rouffach, France)

“…Stormwater wetlands can capitalize intrinsic physical, chemical and biological detention as well as degradative processes useful for treating various organic chemicals , including pesticides (Grégoire et al, 2009;Stehle et al, 2011). In particular, recent studies have underscored the potential of stormwater wetlands as a management practice targeting pesticide attenuation and water quality improvement (Budd et al, 2009;Imfeld et al, 2013;Maillard et al, 2011).…”