Sorption of carbofuran and diuron pesticides in 43 tropical soils of Sri Lanka

Journal of Agricultural and Food Chemistry
Janitha A LiyanageR S Kookana

Abstract

To better understand the environmental fate of pesticides in Sri Lankan soils, we studied the sorption behavior of two commonly used pesticides (carbofuran and diuron) in 43 surface soils representing a range of soil physicochemical properties from dry and wet zones of Sri Lanka. For carbofuran, the K(d) (L/kg) values varied from 0.11 to 4.1 (mean, 0.83; median, 0.62) and K(oc) ranged from 7.3 to 120.6 (mean, 41.65; median, 36.1), whereas for diuron K(d) values varied from 0.5 to 75 (mean, 9.6; median, 5.15) and K(oc) ranged from 55.3 to 962 (mean, 407; median, 328). A comparison of sorption data on these tropical soils with published studies (mostly European and north American soils) showed that the ranges of sorption coefficients from Sri Lankan soils were within the wide range of K(oc) values reported in the literature. However, these values for both pesticides in soils from dry zones of Sri Lanka were consistently higher (up to two times) than those from the wet zone. The wide range of K(oc) values in Sri Lankan soils may be due to the possible difference in the nature of soil organic carbon, which needs to be further investigated.

References

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Citations

Jul 5, 2012·Ecotoxicology·Tiago Natal-da-LuzJosé Paulo Sousa
Apr 5, 2011·Journal of Hazardous Materials·Alipio Bermúdez-CousoManuel Arias-Estévez
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Jun 15, 2007·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Leandro CarboErmelinda M De-Lamonica-Freire
Sep 4, 2012·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Carolina LourencettiMaria L Ribeiro
Aug 28, 2019·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Elisandra C MartinsGilberto Abate
Apr 7, 2015·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Daniel O OnungaHassan Were
Nov 18, 2018·Environmental Science and Pollution Research International·Tanya CáceresAndrew Cannavan
Mar 7, 2020·Environmental Monitoring and Assessment·Babatunde Kazeem Agbaogun, Klaus Fischer
Apr 9, 2008·Journal of Agricultural and Food Chemistry·Rai S KookanaSean T Forrester

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