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Sparingly soluble pesticide dissolved in ionic liquid aqueous
Tengfei Fan1, Xuemin Wu, Qingrong Peng
1College of Science, China Agricultural University , Beijing 100091, China.
The Journal of Physical Chemistry. B
|September 16, 2014
Summary
Aqueous ionic liquids (ILs) offer a greener alternative to organic solvents for dissolving pesticides. These eco-friendly solvents significantly enhance pesticide solubility, proving promising for formulations.
Area of Science:
- Green Chemistry
- Environmental Science
- Physical Chemistry
Background:
- Organic solvents used in pesticide formulations pose environmental risks.
- Developing sustainable and effective alternatives is crucial for the agrochemical industry.
- Ionic liquids (ILs) are investigated as potential eco-friendly solvents.
Purpose of the Study:
- To evaluate aqueous ionic liquids as environmentally friendly solvents for sparingly soluble pesticides.
- To investigate the effect of IL structure on pesticide solubilization.
- To assess the potential of ILs for pesticide formulation.
Main Methods:
- Synthesis and characterization of various aqueous ionic liquids.
- Surface tension measurements to determine aggregation behavior (minimum area per molecule).
- Solubility testing of pesticides (metolachlor, acetochlor, clethodim, thiamethoxam, nitenpyram, prochloraz) in aqueous ILs.
Main Results:
- Aqueous ILs demonstrated effective solubilization of tested pesticides.
- Pesticide solubility increased significantly in aqueous ILs compared to water.
- Prochloraz solubility increased 5771-fold in [C10mim][I] compared to pure water.
- Alkyl chain length and anion type influenced IL aggregation and pesticide solubilization.
Conclusions:
- Aqueous ionic liquids are effective and eco-friendly alternatives to traditional organic solvents for pesticide dissolution.
- ILs show significant potential for use in emulsifiable concentrate (EC) pesticide formulations.
- Further research into ILs can advance sustainable practices in agrochemical development.
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