Spreading of Oil Droplets Containing Surfactants and Pesticides on Water Surface Based on the Marangoni Effect.

ABSTRACT: Oil droplets containing surfactants and pesticides are expected to spread on a water surface, under the Marangoni effect, depending on the surfactant. Pesticides are transported into water through this phenomenon. A high-speed video camera was used to measure the movement of Marangoni ridges. Gas chromatography with an electron capture detector was used to analyze the concentration of the pesticide in water at different times. Oil droplets containing the surfactant and pesticide spread quickly on the water surface by Marangoni flow, forming an oil film and promoting emulsification of the oil-water interface, which enabled even transport of the pesticide into water, where it was then absorbed by weeds. Surfactants can decrease the surface tension of the water subphase after deposition, ther

SUBMITTER: Liu J 

PROVIDER: S-EPMC7961330 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature