Sorption and desorption of atrazine and diuron onto water dispersible soil primary size fractions

Water Research
Peng Wang, Arturo A Keller

Abstract

In this study, a low energy separation method was employed to separate water dispersible clay-, silt-, and sand-sized fractions. The batch equilibrium method was used to conduct atrazine and diuron sorption/desorption experiments with the bulk soils and their size fractions separately. A Freundlich sorption model provided the best fit for all sorption and desorption data. A mass balance calculation, taking into account the pesticide concentration differences in the size fraction and bulk soil, showed that pesticide sorption onto the different size fractions reproduces well the total amount of the pesticide sorbed onto the bulk soils. Due to their higher soil organic carbon content, the clay fractions were much more effective sorbents for the pesticides than the bulk soils, silt, and sand fractions. For all soils, the amount of the pesticide sorbed onto the clay fractions was more than 20% of the total amount of the pesticide sorbed by the bulk soils even though the clay fractions in these soils were only 5.3-14.0% (by weight). The clay fractions had the highest desorption hysteresis among all size fractions and the bulk soils, followed by silt fractions, implying the clay fractions had the strongest bound and least desorbable p...Continue Reading

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Citations

Feb 6, 2016·Environmental Monitoring and Assessment·Anup Kumar, Neera Singh
Dec 25, 2015·Journal of Agricultural and Food Chemistry·Jussara Borges RegitanoLuís R F Alleoni
Feb 16, 2010·Journal of Hazardous Materials·Yihua LiuGuonian Zhu
Dec 17, 2015·Journal of Agricultural and Food Chemistry·Eloana BonfleurJussara Borges Regitano
Oct 11, 2014·Environmental Science and Pollution Research International·Yufen HuangYanliang Li
May 26, 2016·Environmental Monitoring and Assessment·Ping WuHong Yang
Jul 23, 2016·Chemosphere·Ainara Domínguez-GarayAbraham Esteve-Núñez
Dec 5, 2012·Environmental Science & Technology·Perry J Mitchell, Myrna J Simpson
Feb 8, 2013·Journal of Agricultural and Food Chemistry·Laura A SuddabyColin D Brown
Sep 19, 2012·Journal of Agricultural and Food Chemistry·Jaime VillaverdeEsmeralda Morillo
Aug 28, 2019·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Elisandra C MartinsGilberto Abate
Dec 5, 2018·Journal of Environmental Quality·Ling OuMatthew L Polizzotto
Aug 9, 2012·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Nathalie GineysEmmanuelle Vulliet
Sep 6, 2020·The Science of the Total Environment·Haile A ShishayeWanda De Verelle-Hill
Jul 3, 2021·International Journal of Environmental Research and Public Health·Lizethly Cáceres-JensenBruno Loch-Arellano
Jun 18, 2020·ACS Omega·Islam Md MeftaulMallavarapu Megharaj
Nov 18, 2021·Analytical Methods : Advancing Methods and Applications·Mathavan VickneswaranBlánaid White

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