Dissipation of insecticides in a Mediterranean soil in the presence of wastewater and surfactant solutions. A kinetic model approach

Hernandez-Soriano, M. Carmen, Dolores Mingorance, M. and Peña, Aranzazu (2009) Dissipation of insecticides in a Mediterranean soil in the presence of wastewater and surfactant solutions. A kinetic model approach. Water Research, 43 9: 2481-2492. doi:10.1016/j.watres.2009.03.016


Author Hernandez-Soriano, M. Carmen
Dolores Mingorance, M.
Peña, Aranzazu
Title Dissipation of insecticides in a Mediterranean soil in the presence of wastewater and surfactant solutions. A kinetic model approach
Journal name Water Research   Check publisher's open access policy
ISSN 0043-1354
1879-2448
Publication date 2009-05-01
Sub-type Article (original research)
DOI 10.1016/j.watres.2009.03.016
Open Access Status Not Open Access
Volume 43
Issue 9
Start page 2481
End page 2492
Total pages 12
Place of publication London, United Kingdom
Publisher I W A Publishing
Language eng
Formatted abstract
The simultaneous disappearance of four organophosphorous insecticides in a Mediterranean calcareous soil was evaluated in the presence of surfactant solutions and municipal wastewater. A cationic, an anionic and a non-ionic surfactant were used at a low (0.75 mg L−1) and at a high (twice the critical micelle concentration) concentration level. The cationic surfactant was also studied at a higher concentration. Dissipation in control soil was rapid for malathion (half-life 4 days), intermediate for dimethoate and methidathion (ca. 6 days) and slow for diazinon (29 days). Wastewater did either not modify (diazinon, dimethoate and methidathion) or slightly enhance (malathion) insecticide decay. The increase in concentration of the non-ionic surfactant Tween 80 resulted in enhanced dissipation rates for all the pesticides except diazinon. The addition of the anionic surfactant did not show a clear trend. At the highest cationic surfactant concentration a reduction of pesticide disappearance occurred linked with a reduced availability, since the insecticides were retained on the surfactant-modified soil (final residual concentration of 85% for diazinon and ≈55% for methidathion and dimethoate). Soil microbial activity, estimated by measuring dehydrogenase activity, was low in wastewater- and surfactant-treated soil at the high levels. Fitting of the experimental data to commonly used mathematical models was poor and alternatives were looked for.
Keyword Persistence
Pesticides
Surfactants
Wastewater
Bi-phasic kinetic models
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Agriculture and Food Sciences
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 14 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 16 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Mon, 06 Jan 2014, 14:36:39 EST by Maria Hernandez-soriano on behalf of School of Agriculture and Food Sciences