Modeling of the Pyridalyl Pesticide Extraction Process from the Aqueous Solution by Molecular Imprinted Polymer and Dispersive Liquid Liquid Micro Extraction

In this paper, we evaluate the performance of methods for extraction and separation of pyridalyl (pyl) pesticide from aqueous samples. In the solid phase extraction method, a non-covalently synthesized molecularly imprinted polymer is used. The properties of the synthesized polymers were investigated by BET and scanning electron microscopy. The effective parameters for pesticide extraction, such as adsorbent dose, pH, contact time and stirring rate, to achieve high removal percentage were studied using respond surface method. The capacity of solid phase (adsorbent) was also determined. In addition, DLLME method was used as a green, simple, rapid and sensitive method for measuring and removal of the pesticides. The effect of influencing factors on microextraction, such as type and volume ratio of dispersive and extractive solvents, salt concentration, pH and extraction time were investigated and optimized. The maximum recovery of the pesticide using SPE was obtained 75%. However, the recovery efficiency of 85% was achieved by DLLME. The results showed that both extraction methods have high potential to effectively reduce pesticides from aqueous solutions, however, the dispersive liquid liquid microextraction method has higher priority due to the very short separation time, higher transition aqueous phase to the organic phase, and the use of safe solvents.