| Effects of temperature on sorption-desorption processes of imidacloprid in soils of Croatian coastal regions. | |
| | |
MedLine Citation:
|
PMID: 22575005 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
|
Sorption-desorption behavior of imidacloprid in six soils collected from five coastal regions in Croatia at 20, 30 and 40°C was investigated using batch equilibrium technique. Isothermal data were applied to Freundlich, Langmuir and Temkin equations, and the thermodynamic parameters ΔH°, ΔG°, ΔS° were calculated. The sorption isotherm curves were non-linear and may be classified as L-type, suggesting a relatively high sorption capacity for imidacloprid. Our results showed that the K( sor ) ( F ) values decreased for all the tested soils as the temperature increased, indicating that the temperature strongly influences the sorption. Values of ΔG° were negative (-4.65 to -2.00 kJ/mol) indicating that at all experimental temperatures the interactions of imidacloprid with soils were spontaneous processes. The negative and small ΔH° values (-19.79 to -8.89 kJ/mol) were in the range of weak forces, such as H-bonds, consistent with interactions and partitioning of the imidacloprid molecules into soil organic matter. The ΔS° values followed the range of -57.12 to -14.51 J/molK, suggesting that imidacloprid molecules lose entropy during transition from the solution phase to soil surface. It was found that imidacloprid desorption from soil was concentration and temperature-dependent, i.e. at lower imidacloprid concentrations and temperature, lower desorption percentage occurred. Desorption studies revealed that hysteretic behavior under different temperature treatments existed, and it was more pronounced at 20°C in the soils with higher OC content. The study results emphasize the importance of thermodynamic parameters in controlling soil pesticide mobility in different geographical locations, seasons and greenhouse conditions. |
| | |
Authors:
|
Dalibor Broznić; Cedomila Milin |
Related Documents
:
|
21894375 - Raphidascaris (sprentascaris) lanfrediae sp. nov. (nematoda: anisakidae) from the fish ... 10819175 - Effects of a copper smelter on a grassland community in the puchuncaví valley, chile. 15660155 - Relaxed molecular clock provides evidence for long-distance dispersal of nothofagus (so... 19772305 - Carbon nanotubes are able to penetrate plant seed coat and dramatically affect seed ger... 19525105 - Effect of nine years of animal waste deposition on profile distribution of heavy metals... 20041345 - Biomagnifications of mercury and methylmercury in tuna and mackerel. |
Publication Detail:
|
Type: Journal Article |
Journal Detail:
|
Title: Journal of environmental science and health. Part. B, Pesticides, food contaminants, and agricultural wastes Volume: 47 ISSN: 1532-4109 ISO Abbreviation: J Environ Sci Health B Publication Date: 2012 Sep |
Date Detail:
|
Created Date: 2012-05-11 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 7607167 Medline TA: J Environ Sci Health B Country: England |
Other Details:
|
Languages: eng Pagination: 779-94 Citation Subset: IM |
Affiliation:
|
a Department of Chemistry and Biochemistry, School of Medicine, University of Rijeka , Rijeka , Croatia. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Biodegradation of s-triazine herbicide atrazine by Enterobacter cloacae and Burkholderia cepacia sp....
Next Document: Controlled release and retarded leaching of pesticides by encapsulating in carboxymethyl chitosan /b...