Strategies to Minimize the Pollution of Water by Pesticides

Guyot, Christian

doi:10.1007/978-3-642-79104-8_3

Cited by 10 publications

(3 citation statements)

References 59 publications

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“…Widespread use of pesticides for agriculture production has led to their accumulation in soil, surface and ground water, resulting in serious environmental problems [1,2]. However, there has been increasing interests in past decades to develop new adsorbents, such as cationic clays [3][4][5][6][7][8][9][10], which can remove pesticides efficiently from aqueous solutions.…”

Section: Introductionmentioning

confidence: 99%

Study on adsorption of glyphosate (N-phosphonomethyl glycine) pesticide on MgAl-layered double hydroxides in aqueous solution

Wang

Yang

et al. 2005

Journal of Hazardous Materials

137

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Section: Introductionmentioning

confidence: 99%

Study on adsorption of glyphosate (N-phosphonomethyl glycine) pesticide on MgAl-layered double hydroxides in aqueous solution

Wang

Yang

et al. 2005

Journal of Hazardous Materials

137

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“…It has been identified as a potential leacher by using the groundwater ubiquity scores (GUS) modeling technique (11). Its high acute toxicity, LD 50 (rat) ) 8 mg kg -1 (12), is of environmental concern.…”

Section: Introductionmentioning

confidence: 99%

Development of Controlled Release Formulations of Carbofuran and Evaluation of Their Efficacy against Meloidogyne incognita

Choudhary

Kumar

Walia

et al. 2006

J. Agric. Food Chem.

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Controlled release (CR) formulations of the insecti-nematicide carbofuran have been prepared using commercially available rosin, sodium carboxymethylcellulose and sodium carboxymethylcellulose with clay (bentonite, kaolinite, and Fuller's earth). The kinetics of carbofuran release in soil from the different formulations were studied in comparison with that of the commercially available granules (3G). Release from the commercial formulation was faster than with the new CR formulations. Addition of clay in the biodegradable polymer matrix reduced the rate of release. The diffusion exponent (n value) of carbofuran in soil ranged from 0.462 to 0.740 in the tested formulations. The half-release (t1/2) values ranged between 4.79 and 25.11 days, and the period of optimum availability (POA) of carbofuran ranged from 15.10 to 43.97 days. The mean EC50 of the commercial formulation against Meloidogyne incognita was quite high as compared to those of CR formulations. The effective duration (te) of carbofuran from the CR and commercial formulations was predicted by fitting the mean EC50 values of test formulations in the model (M(infinity) - Me)/M(infinity) = Kdte. It was 0.7 day in commercial 3G in comparison with 17.8 days for CMC-bentonite. The bioassay studies revealed that with the rosin-yellow polymer, the dose of carbofuran could be reduced to half of its recommended dose for nematode control. Overall, a comparison of CR formulations with the commercial one showed an earlier degradation of carbofuran in the latter and relatively prolonged activity in the former.

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“…Much, if not most, of the amount of soil-applied pesticides are wasted due to losses resulting from physical, chemical, and biological processes (Gerstl, 1991;Triegel and Guo, 1994). The excessive quantities added increase the likelihood of runoff or leaching and thus the pollution of surface or ground water (Guyot, 1994). Ground water pollution by pesticides, in particular, the herbicides atrazine and alachlor, is quite common (Isensee and Sadeghi, 1995;Gish et al, 1994;Cohen, 1996;Williams et al, 1995).…”

Section: Introductionmentioning

confidence: 99%

Controlled Release of Pesticides into Soils from Clay−Polymer Formulations

Gerstl

Ahmed

Mingelgrin

1998

J. Agric. Food Chem.

101

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Alachlor was released from a controlled-release formulation (CRF) when applied to a sandy loam soil under conditions of constant temperature and moisture and achieved concentrations of 0.1−0.2 mg/kg after 1 week. Soil concentrations of 0.2−0.8 mg/kg were maintained for at least an additional 8 weeks. A large portion (35−70%) of the active ingredient was still present in the CRFs at the conclusion of the experiment. Application of alachlor as the commercial formulation resulted in 50% dissipation after only 3−4 days. Alachlor released from CRFs with a smaller diameter resulted in higher soil concentrations (1.2 mg/kg) after 18 days. In column leaching studies the leaching of alachlor, atrazine, and trifluralin from CRFs was considerably reduced with respect to leaching of the same compounds from commercial formulations. The release of alachlor from an Al-pillared clay CRF and its subsequent transport in soil columns showed that pillared clays can be used for controlled release of herbicides, but more work is necessary before the effects of the many factors involved in the release of the active ingredients from pillared clays are completely understood. Keywords: Controlled release; alachlor; atrazine; trifluralin; herbicides; clay; alginate; pectin; diffusion; degradation; pillared clays

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Strategies to Minimize the Pollution of Water by Pesticides

Cited by 10 publications

References 59 publications

Study on adsorption of glyphosate (N-phosphonomethyl glycine) pesticide on MgAl-layered double hydroxides in aqueous solution

Study on adsorption of glyphosate (N-phosphonomethyl glycine) pesticide on MgAl-layered double hydroxides in aqueous solution

Development of Controlled Release Formulations of Carbofuran and Evaluation of Their Efficacy against Meloidogyne incognita

Controlled Release of Pesticides into Soils from Clay−Polymer Formulations

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