A NEW MIP EMBEDDED CRYOGEL FOR SELECTIVE PRE-CONCENTRATION AND REMOVAL OF PROPACHLOR

Year 2020, , 72 - 85, 31.03.2020

Ayça Atılır Özcan , Melike Özhan

https://doi.org/10.18038/estubtda.545380

Abstract

Propachlor is a pesticide
commonly used in the chloroacetanilide herbicide group. Propachlor
contamination occurs in groundwater resources and soil sources. Therefore
removal and also the determination of trace amounts of propachlor is a very
important issue. Molecularly imprinted polymers (MIPS) are preferred for their
advantages such as high affinity, strength, and selectivity in pesticide
removal and determination. In this study, MIP embedded cryogel was synthesized
for selective adsorption and removal of propachlor. MIP synthesis was performed
using the template molecule propachlor, functional monomer methacrylic acid,
crosslinker ethylene glycol dimethacrylate (EDGMA), solvent hexadecane and
2,2-azo-bis-isobutyronitrile (AIBN) as the initiator. Cryogels are a good
alternative for separation and purification because of their advantageous
properties such as short diffusion, low pressure and adsorption and elution in
a short time. The structure of MIP was determined using scanning electron
microscopy (SEM), Elemental analyze and Fourier transform infrared spectroscopy
(FT-IR), and the structure of MIP embedded cryogel was determined using
scanning electron microscopy (SEM). The highest adsorption capacity for MIP was
5.58 mg g^-1 at pH 5. The highest adsorption capacity for MIP
embedded cryogel was found to be 14.38 mg g^-1. MIP embedded cryogel
were used for selective adsorption and desorption of propachlor in
environmental samples. The concentration of propachlor in environmental samples
was analyzed by high-performance liquid chromatography (HPLC).

 

Keywords

Propachlor, adsorption, molecular imprinting, cryogel

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