Extraction of Pesticides from Contaminated Soil via Cyclodextrin Complexation

Presentation Type

Poster/Portfolio

Presenter Major(s)

Chemistry

Mentor Information

Andrew Lantz, lantza@gvsu.edu

Department

Chemistry

Location

Henry Hall Atrium 29

Start Date

13-4-2011 9:00 AM

End Date

13-4-2011 10:00 AM

Keywords

Environment, Physical Science

Abstract

Cyclodextrins (CDs) were successfully used to extract commonly used pesticides from contaminated soil via CD complexation, a more environmentally friendly method compared to surfactants and organic solvents. A combination of five CDs (alpha-CD, beta-CD, gamma-CD, hydroxypropyl-beta-CD, and Methyl-beta-CD) and eight pesticides 2,4-D, alachlor, acetochlor, diazinon, dicamba, dimethanamid, metalochlor and propanil) were examined in this study. It was found that a linear relationship exists between the concentrations of the M-beta-CD and alachlor, which generally indicates that the amount of pesticide extracted depends on the concentration of the cyclodextrin present. With some pesticide-cyclodextrin combination, it was found that as the concentration of cyclodextrin increases the CD-pesticide inclusion complex precipitated out of solution, thus reducing the solubility of the pesticide. Overall the most effective extractants based on this study were found to be HP-beta-CD and M-beta-CD.

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Apr 13th, 9:00 AM Apr 13th, 10:00 AM

Extraction of Pesticides from Contaminated Soil via Cyclodextrin Complexation

Henry Hall Atrium 29

Cyclodextrins (CDs) were successfully used to extract commonly used pesticides from contaminated soil via CD complexation, a more environmentally friendly method compared to surfactants and organic solvents. A combination of five CDs (alpha-CD, beta-CD, gamma-CD, hydroxypropyl-beta-CD, and Methyl-beta-CD) and eight pesticides 2,4-D, alachlor, acetochlor, diazinon, dicamba, dimethanamid, metalochlor and propanil) were examined in this study. It was found that a linear relationship exists between the concentrations of the M-beta-CD and alachlor, which generally indicates that the amount of pesticide extracted depends on the concentration of the cyclodextrin present. With some pesticide-cyclodextrin combination, it was found that as the concentration of cyclodextrin increases the CD-pesticide inclusion complex precipitated out of solution, thus reducing the solubility of the pesticide. Overall the most effective extractants based on this study were found to be HP-beta-CD and M-beta-CD.