Differential Transport of Atrazine and Glyphosate in Undisturbed Sandy Soil Column

Abstract

With increasing awareness and concern for environmental quality, it is important to

Short-term transport of glyphosate with erosion in Chinese loess soil — A flume experiment

“…Admittedly, with the duration of rainfall and the distance of transport route, the dilution effect on pollutant has been considered a solution to reduce the risk based on the environmental load but it is also debated (Floehr et al, 2013). EPA (2003) reported that 1.1 μg L − 1 of glyphosate was detected which is ten times of the EU limit value (0.1 μg L −1 ) for this herbicide in groundwater while the level of glyphosate/AMPA in public water system is seldom reported comparing to the studies of them in soils, China (Zhao et al, 2009;Zhou et al, 2010). Although precipitation dilutes the concentration of pollutants, the level of glyphosate and AMPA in the runoff of this study was still high which is in accordance with other studies (Ramwell et al, 2014;Ruiz-Toledo et al, 2014;Todorovic et al, 2014).…”

“…Bonded residues of glyphosate are not considered to be bioavailable and therefore not harmful to the environment onsite (Barriuso et al, 2008), but if transported with soil erosion to surface water, the bond residues then enter into the aquatic food chain (Sihtmae et al, 2013). Soil properties and climate also influence the mobility and interactions of glyphosate (Gjettermann et al, 2009;Sorensen et al, 2006;Wang et al, 2005;Zhao et al, 2009;Zhou et al, 2010). Absorbed glyphosate and AMPA can be desorbed at the water-soil interface (Borggaard and Gimsing, 2008;Candela et al, 2007;Coupe et al, 2012;Donald, 2002;Passeport et al, 2014), and competition with phosphates for adsorption sites may lead to free glyphosate rather than the bound form in the soil matrix (Borggaard and Gimsing, 2008;Gimsing et al, 2004;Zhou et al, 2010).…”

“…Soil properties and climate also influence the mobility and interactions of glyphosate (Gjettermann et al, 2009;Sorensen et al, 2006;Wang et al, 2005;Zhao et al, 2009;Zhou et al, 2010). Absorbed glyphosate and AMPA can be desorbed at the water-soil interface (Borggaard and Gimsing, 2008;Candela et al, 2007;Coupe et al, 2012;Donald, 2002;Passeport et al, 2014), and competition with phosphates for adsorption sites may lead to free glyphosate rather than the bound form in the soil matrix (Borggaard and Gimsing, 2008;Gimsing et al, 2004;Zhou et al, 2010). The free forms of glyphosate and AMPA are thus easily dispersed, especially in wet soils due to preferential flow (Vereecken, 2005), and heavy rains shortly after glyphosate application increase the entry of glyphosate to surface water bodies through transport with runoff and suspended load (Botta et al, 2009;Candela et al, 2010;Gjettermann et al, 2009;Peruzzo et al, 2008;Stone and Wilson, 2006;Vereecken, 2005).…”

Comparisons of Microwave-Assisted Extraction, Simultaneous Distillation-Solvent Extraction, Soxhlet Extraction and Ultrasound Probe for Polycyclic Musks in Sediments: Recovery, Repeatability, Matrix Effects and Bioavailability

“…In the last decade, pharmaceuticals and personal care products have been of increasing concern to researchers due to their pseudo-persistent properties, and potential harm to human beings and the environment [1][2][3][4][5][6][7]. Polycyclic musks (as pharmaceuticals and personal care products) are added to toiletries, cosmetics, and household and consumer products.…”

Fate and Transport of Naproxen in a Sandy Aquifer Material: Saturated Column Studies and Model Evaluation

“…Consequently, Naproxen is highly mobile in the aquifer media and ionic interactions may represent important contributions to total sorption (Maeng et al, 2011). Although sorption data on Naproxen from batch experiments are necessary for process understanding, miscible-displacement experiments may be more appropriate, since flowing conditions, even in the laboratory, may better represent dynamic, transient field conditions (Zhou et al, 2010).…”