Synthesis, characterization, and evaluation of a selective molecularly imprinted polymer for quantification of the textile dye acid violet 19 in real water samples

Miguel Luna Quinto; Sabir Khan; Gino Picasso; Maria Del Pilar Taboada Sotomayor

doi:10.1016/j.jhazmat.2019.121374

Synthesis, characterization, and evaluation of a selective molecularly imprinted polymer for quantification of the textile dye acid violet 19 in real water samples

J Hazard Mater. 2020 Feb 15:384:121374. doi: 10.1016/j.jhazmat.2019.121374. Epub 2019 Oct 12.

Authors

Miguel Luna Quinto¹, Sabir Khan², Gino Picasso³, Maria Del Pilar Taboada Sotomayor⁴

Affiliations

¹ Laboratory of Physical Chemistry Research, Faculty of Sciences, National University of Engineering, Av. Tupac Amaru 210, Rimac, Lima, Peru.
² Department of Analytical Chemistry, Institute of Chemistry, State University of São Paulo (UNESP), 14801-970 Araraquara, SP, Brazil; National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM), Araraquara, SP, Brazil.
³ Laboratory of Physical Chemistry Research, Faculty of Sciences, National University of Engineering, Av. Tupac Amaru 210, Rimac, Lima, Peru. Electronic address: gpicasso@uni.edu.pe.
⁴ Department of Analytical Chemistry, Institute of Chemistry, State University of São Paulo (UNESP), 14801-970 Araraquara, SP, Brazil; National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM), Araraquara, SP, Brazil. Electronic address: m.sotomayor@unesp.br.

PMID: 31672437
DOI: 10.1016/j.jhazmat.2019.121374

Abstract

A molecularly imprinted polymer (MIP) was developed for the determination of acid violet 19 (AV19) dye. The MIP was synthesized by polymerization using 1-vinyl imidazole (functional monomer) and 2,2'-azobis(2-methylpropionitrile) as the radical initiator. The functional monomer was previously selected by computational simulations. The MIP adsorption data could be fitted using the Langmuir model obtained a Q_m value of 6.93 mg g^-1 and 2.84 mg g^-1 for the corresponding non-imprinted polymer (NIP) and the process followed pseudo-second-order kinetics (k₂ 0.2416 mg g^-1 min^-1 MIP). The BET specific surface areas were 229.6 m² g^-1 and 28.6 m² g^-1, to MIP and NIP, respectively. Analyses showed that the material provided excellent selectivity towards acid violet 19 (AV19) when compared to other analytes including Acid Violet 17 (AV17), Tartrazine (TZ), Acid Red 14 (AR14), Patent blue-VF (PBV), Sunset yellow FCF (SY) and Acid Red 1 (AR1). The calculated K_d value for the MIP was 0.116 L g^-1 and the imprinting factor was 2.89. This alternative and effective material for the enrichment, extraction, and determination of acid violet 19 presents in complex real samples was applied using two different rivers water and industrial effluent, with excellent recoveries values ranging between 85% up to 99%.

Keywords: Acid violet analysis; Dispersive solid phase extraction; MIP; Textile dye.

Publication types

Research Support, Non-U.S. Gov't