Adsorption of Atrazine and Alachlor to Aquifer Material and Soil

Schwab, A. P.; Splichal, P. A.; Banks, M. Katherine

doi:10.1007/s11270-006-9108-z

Cited by 12 publications

(5 citation statements)

References 35 publications

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“…The adsorptions of the strobilurin fungicides were positively related to the SOM content. The results were consistent with the previous reports (Rütters et al 1999;Schwab et al 2006;Wang and Keller 2009). In general, if the content of soil clay was higher, the soil particle was smaller and the specific surface area was larger and the adsorption quantity of pesticide was higher (Kim et al 2012).…”

Section: Effect Of Soil Property On Adsorptionsupporting

confidence: 94%

Desorption and mobilization of three strobilurin fungicides in three types of soil

Han

et al. 2016

Environ Monit Assess

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Phenamacril (JS399-19 with independent intellectual property developed by China), azoxystrobin, and kresoxim-methyl are strobilurin fungicide. Due to their broad spectrum and good control of most of known fungi, strobilurin fungicide has been widely used in agriculture management. Thus, it is important to evaluate their environmental behaviors particularly in soils and underground water. In this study, the sorption/desorption and mobility of strobilurin fungicides in three Chinese soils (Jiangxi red soil, Taihu paddy soil, and Northeast China black soil) were conducted using comprehensively analytic approaches including batch experiment and soil thin-layer chromatography. The strobilurin fungicides were hard to be adsorbed in Jiangxi red soil but had medium adsorption capability in Tanhu paddy soil and Northeast China black soil, while the desorption of three strobilurin fungicides ranked in the order of Jiangxi red soil > Taihu paddy soil > Northeast China black soil. Soil properties including soil organic matter (SOM), pH, and cationic exchange capacity (CEC) affected the adsorption/desorption of the fungicides. Azoxystrobin and kresoxim-methyl had weak mobility in the soils. JS399-19 was moderately mobile in Jiangxi red soil but was not easily moved in Taihu paddy soil and Northeast China black soil. Due to their weak mobility in soils, these strobilurin fungicides tended to remain in the soil phase but not to shift downward to underground water. As azoxystrobin and JS399-19 had a long retention period in soil, there may become persistent residues in the soil environment.

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Section: Effect Of Soil Property On Adsorptionsupporting

confidence: 94%

Desorption and mobilization of three strobilurin fungicides in three types of soil

Han

et al. 2016

Environ Monit Assess

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“…Also, the pesticide BC values were significantly higher in the clayey soil (CCL)-solution system than in the sandy soil (CLS)-solution system without ZVI application. Schwab et al (2006) also reported similar results that adsorption coefficients of alachlor were 4-20 times higher for loam and silt loam soils than for aquifer sandy soils. However, the BC values significantly increased after applying ZVI in the both adsorption sites, Regions 1 and 2, in the soil-solution systems.…”

Section: Effects Of Zvi On the Pesticide Adsorption Quantity-intensitsupporting

confidence: 57%

Impacts of zerovalent iron application on the adsorption behavior of alachlor and metalaxyl in water and soil systems

2011

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Alachlor and metalaxyl contaminations of environmental and agricultural water and soil systems cause potential threats to human health. However, information on the pesticide adsorption quantity-intensity (Q/I) relationships in water and soil systems is limited. Therefore, adsorption behavior and the fate of alachlor and metalaxyl in the systems as influenced by the application of zerovalent iron (ZVI, Fe 0 ) were investigated using the pesticide adsorption Q/I relationships. After treating ZVI in the systems, the concentration of alachlor rapidly decreased within a few days and then it disappeared at approximately 5-7 experiment days; whereas metalaxyl concentration was reduced by approximately 40-45% during the 28 day experimental period. In particular, ZVI adsorbed more metalaxyl in the aqueous system than in the soil-solution system. The alachlor concentration in the water and soil solution drastically decreased with increasing ZVI treatment, while metalaxyl concentration was relatively slow in its decrease. Adsorption mechanism of the pesticides in the soil-solution system was shown as multiple-site adsorption Q/I fitting. Buffering capacity (BC) of the pesticides increased with ZVI treatment in all sorption sites. The BC values in sandy soil were escalated with increasing ZVI application rates, so that the values were rather higher in sandy soil than in clayey soil. In addition, changes in alachlor concentration with applying ZVI were due to both dechlorination and adsorption; whereas metalaxyl concentration was dependent upon adsorption reaction. Thus, the pesticide adsorption Q/I relationships in different soilsolution systems were critically affected by the ZVI treatment.

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“…The determined organochlorine pesticide levels in rye plants are low, at residual levels that are below the Codex Alimentarius Commission maximum residue limits. Schwab et al (2006) studied the adsorption of atrazine and alachlor to aquifer material and soil and reported that the adsorption of atrazine and alachlor, which was investigated on three typical Kansas and underlying aquifers, were found to be contaminated more with alachlor as compared to atrazinein soil and sediments. The adsorption coefficients for atrazine were two to five times higher for soils than for aquifer sediments.…”

Section: Organochloro Pesticides Contamination Scenariomentioning

confidence: 99%

Bioaccumulation of organochlorine pesticides in aquatic system—an overview

Chopra

Sharma

Chamoli

2010

Environ Monit Assess

154

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In recent years, various environmental issues have aroused a concern on the pollution of pesticides in rivers and in their various intercompartments. Multiple residues of pesticides discharged from industries or as a result of extensive use of agrochemicals in agriculture have been monitored. These pesticide residues contaminate the river ecosystem and its intercompartments such as sediments, and aquatic biota, and make it harmful to humans when they contaminate food and drinking water. The pesticide contamination in water, sediments, and aquatic biota has been reported to be beyond the acceptable range. The most commonly found pesticides are organochlorine, namely, dichlorodiphenyltrichloroethane, hexachlorocyclohexane, endosulfan, heptachlor, lindane, dieldrin, aldrin, endrin, and others. The paper discusses the general description, classification, and toxicity of pesticides; it also aims to create public awareness among people and appraise them with various alternate methods to combat the problem of pesticide contamination. An attempt has also been made to elucidate the findings of various works on pesticides in aquatic system and to highlight the challenging aspects of pesticide contamination, which have not attracted the attention of investigators yet.

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Adsorption of Atrazine and Alachlor to Aquifer Material and Soil

Cited by 12 publications

References 35 publications

Desorption and mobilization of three strobilurin fungicides in three types of soil

Desorption and mobilization of three strobilurin fungicides in three types of soil

Impacts of zerovalent iron application on the adsorption behavior of alachlor and metalaxyl in water and soil systems

Bioaccumulation of organochlorine pesticides in aquatic system—an overview

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