Kinetic of Transport of Technogenic Ecotoxicants through Model Membranes
Elena A. Saratovskikh, Boris L. Psikha
DOI: 10.4236/jep.2010.14047   PDF   HTML     3,875 Downloads   7,331 Views  


The kinetics of ecotoxicant transport through the membrane was studied. The ecotoxicants studied were pecticides widely used in agriculture: lontrel (clopyralid), sencor (metribuzin), basagran (bentazon), roundup (glyphosate), kusagard (alloxydim sodium), and sethoxydim, as well as lontrel complexes with cobalt and copper. All compounds considered penetrate through the model phosphatidylcholine liposomal membranes. The transfer rate was monitored by fluorescence quenching of ?-ATP inside the liposomes. The mathematical model for the process was proposed, and the mass transfer rates were calculated. The octanol/water partition constants were determined. All the compounds con- sidered were shown to accumulate in the fatty layer. The kinetics of their accumulation was studied, and the rates of accumulation in the nonpolar phase were calculated, which correlate with the complexation constants of the same compounds. Bioaccumulation of the toxicants is caused by the formation of complexes with the fatty phase (lipid part) of the cellular membranes. The toxicants under study transferred into the nonpolar phase with a considerable rate dur- ing the whole observation time, namely, 18 months.

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Saratovskikh, E. and Psikha, B. (2010) Kinetic of Transport of Technogenic Ecotoxicants through Model Membranes. Journal of Environmental Protection, 1, 410-419. doi: 10.4236/jep.2010.14047.

Conflicts of Interest

The authors declare no conflicts of interest.


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