Molecularly imprinted polymers for selective adsorption of quinoline: theoretical and experimental studies

• Autor(a) principal: Saavedra, Liz Nayibe Martínez
• Data de Publicação: 2018
• Outros Autores: Penido, Ricardo Gonçalves, Santos, Lucas de Azevedo, Ramalho, Teodorico C., Baeta, Bruno E. Lobo, Pereira, Márcio C., Silva, Adilson Candido da
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFLA
• Texto Completo: http://repositorio.ufla.br/jspui/handle/1/36350
• topic: Molecularly imprinted polymers; Quinoline molecule; Thermogravimetric analysis; Scanning electron microscopy; Polímeros molecularmente impressos; Molécula de quinoleína; Análise termogravimétrica; Microscopia Eletrônica de Varredura

The effects of solvent on the synthesis of molecularly imprinted polymers (MIPs) for the selective adsorption of quinoline were evaluated in this work. The MIPs were synthesized by the “bulk” method using the quinoline molecule (IQ) as a template in different solvents, such as toluene (MIPT) and chloroform (MIPC). The adsorbents were characterized by thermogravimetric analysis (TGA), Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), and N2 adsorption/desorption measurements. The influences of time, adsorbate concentration, and temperature on the adsorption of quinoline by MIPT and MIPC were evaluated. Maximum adsorption capacities (qe) of 35.23 and 24.10 mg g−1 were obtained for MIPT and MIPC, respectively. Thermodynamic studies indicate that occur physisorption and a spontaneous process (ΔadsG° < 0) entropically directed. Finally, the highest selectivity and reusability of MIPC for quinoline adsorption was ascribed to the better interaction between the chloroform and monomer, which favors the formation of porous adsorbents with higher numbers of adsorption sites.