Synthesis and characterization of cross-linked molecularly imprinted polyacrylamide for the extraction/preconcentration of glyphosate and aminomethylphosphonic acid from water samples

Mata, Kamilla da; Corazza, Marcela Zanetti; Oliveira, Fernanda Midori de; Toffoli, Ana Lúcia de; Tarley, César Ricardo Teixeira; Moreira, Altair Benedito

doi:10.1016/j.reactfunctpolym.2014.07.004

Cited by 40 publications

(30 citation statements)

References 26 publications

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“…As indicated in Table S1 in the ESM, the conversion ratio of the AM in MIP (62.90 %) was 5.71 % higher than that in the NIP (59.50 %), revealing that the reactivity of AM in synthesis of MIP was higher. These results suggested that selective cavities were successfully formed in MIP, which was in agreement with the greater selectivity of the MIP [35]. Figure 2 shows the trend of the imprinting factor with the variation of functional monomer-template (M-T) molar ratio in the range 120:1 to 2000:1.…”

Section: Resultssupporting

confidence: 63%

Effect of minimizing amount of template by addition of macromolecular crowding agent on preparation of molecularly imprinted monolith

Sun

Zhong

et al. 2015

Anal Bioanal Chem

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One of the main challenges in the preparation of molecularly imprinted polymers (MIPs) is the substantial initial amount of template needed because of the requirement of high load capacities for most applications. A new strategy of macromolecular crowding was suggested to solve this problem by reducing the amount of template in the polymerization recipe. In a ternary porogenic system of polystyrene (PS) (crowding agent), tetrahydrofuran, and toluene, an imprinted monolithic column with high porosity and good permeability was synthesized using a mixture of ellagic acid (template), acrylamide, and ethylene glycol dimethacrylate. The effect of polymerization factors, including monomer-template molar ratio and the molecular weight and concentration of PS, on the imprinting effect of the resulting MIP monoliths was systematically investigated. At a high ratio of monomer-template (120:1), the greatest imprinting factor of 32.4 was obtained on the MIP monolith with the aid of macromolecular crowding agent. The PS-based imprinted monolith had imprinting even at the extremely high ratio of functional monomer to template of 1510:1. Furthermore, an off-line solid-phase extraction based on the ground MIP was conducted, and the purification recovery of ellagic acid from pomegranate-rind extract was up to 80 %. In conclusion, this approach based on macromolecular crowding is simple, and is especially valuable for those applications of MIP preparation for which a rare template is used.

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Section: Resultssupporting

confidence: 63%

Effect of minimizing amount of template by addition of macromolecular crowding agent on preparation of molecularly imprinted monolith

Sun

Zhong

et al. 2015

Anal Bioanal Chem

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“…This indicated that the selectivity is 8 and 2 times greater for ketoprofen in the presence of fenoprofen and gemfibrozil, respectively, compared to the NIP. These results indicated that the MIP was highly selective for ketoprofen recognition, relative to the NIP, in aqueous samples which resulted in a low selectivity coefficient (Mata et al, 2014). The order of sorption onto the MIP was ketoprofen > fenoprofen > gemfibrozil.…”

Section: Selectivity Of Mipmentioning

confidence: 94%

“…where: Q is the amount of the adsorbed molecule at equilibrium (mg•g -1 ), n is the Freundlich exponent depicting the adsorption intensity, C e is the equilibrium concentration of the target molecule (mg•L -1 ), α is the adsorption capacity of the target molecule (mg•g -1 ), Q max is the maximum adsorption capacity (mg•g -1 ) and K L is the Langmuir adsorption equilibrium constant (Madikizela and Chimuka, 2016b;Mata et al, 2014). Linear plots were obtained for both Langmuir and Freundlich isotherms (Fig.…”

Section: Molecularly Imprinted Polymer Surface Adsorption Mechanismmentioning

confidence: 99%

Application of molecularly imprinted polymer designed for the selective extraction of ketoprofen from wastewater

Madikizela

Zunngu

Mlunguza

et al. 2018

WSA

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A molecularly imprinted polymer (MIP) that is selective to ketoprofen was synthesized and applied in the adsorption of the target compound from water. The MIP was synthesized using a bulk polymerization method at high temperatures (60–80°C), where ketoprofen, 2-vinylpyridine, ethylene glycol dimethacrylate, toluene and 1,1´-azobis(cyclohexanecarbonitrile) were used as template, functional monomer, cross-linker, porogen and initiator, respectively. Non-imprinted polymer (NIP) was synthesized similarly to the MIP but in the absence of ketoprofen. From molecular dynamics simulation, the nature of interactions that occurred between the template and the functional monomer were found to be based on hydrogen bonding. This was confirmed experimentally, where a high extraction efficiency of ≥ 90% was obtained at acidic conditions (pH 5) due to the protonation of ketoprofen. A contact time of 45 min was sufficient for the maximum adsorption of ketoprofen from 10 mL spiked water using 8 mg of the adsorbent. MIP showed greater selectivity than NIP by achieving a relative selectivity coefficient of 7.7 towards ketoprofen in the presence of structurally related pharmaceuticals. Furthermore, the order of sorption onto the MIPs from water was ketoprofen > fenoprofen > gemfibrozil. From a modelling perspective, the Langmuir adsorption isotherm and pseudo-second-order kinetic model gave the best fit, with maximum adsorption capacity of 8.24 mg·g−1 and sorption rate constant of 0.25 mg·g−1·min−1 for MIP. This was translated to chemisorption of ketoprofen onto the homogeneous MIP binding sites. This work demonstrated the great potential of MIP in selective recognition of ketoprofen from wastewater relative to closely related compounds.

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“…Em 1724 cm -1 é observada a banda vibracional referente ao grupo carboxila (C=O) do ácido carboxílico, que originariamente era uma banda de estiramento a 1670 cm -1 e esta variação de energia do grupo funcional indica o envolvimento do grupo carboxílico na formação do polímero (UMEMURA & HAYASHI, 1974;RAVICHANDRAN et. al., 2004 (SANTOS et al, 2009;MATA et al, 2014;MARESTONI et. al., 2014).…”

Section: Caracterização Eletroquímicaunclassified

Estudo Do Tratamento De Água De Um Igarapé De Manaus Utilizando Um Reator Fotocatalítico Heterogêneo Solar

Marinho¹,

Silva²

2019

Elementos De Química

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Revisão: Os Autores O conteúdo dos artigos e seus dados em sua forma, correção e confiabilidade são de responsabilidade exclusiva dos autores. Permitido o download da obra e o compartilhamento desde que sejam atribuídos créditos aos autores, mas sem a possibilidade de alterá-la de nenhuma forma ou utilizá-la para fins comerciais. Conselho Editorial Ciências Humanas e Sociais Aplicadas APRESENTAÇÃO O grande desenvolvimento do nosso planeta, em diversas áreas, é devido principalmente ao desenvolvimento e utilização da Química. A Química possui papel fundamental no desenvolvimento tecnológico, pois a utilização dos conceitos e técnicas dessa ciência permite a obtenção de novas substâncias, além de preocupar-se com a prevenção de danos e exploração sustentável do meio ambiente. Os trabalhos selecionados para este volume oportunizam reflexão e conhecimento na área da Química, abrangendo aspectos favoráveis para ciência, tecnologia, sociedade e meio ambiente. Temas específicos são abordados em técnicas como eletrocatálise e degradação fotocatalítica. A toxicidade de compostos e análise de contaminantes emergentes é apresentada nos trabalhos com enfoque em tratamento de água e efluentes. Além disso, trabalhos tratam de síntese e sensores eletroquímicos. Inovações na química criam aplicações e soluções em diversas áreas, e pesquisas como as expostas neste volume contribuem para avanços tecnológicos. Com base nestes experimentos, convidamos você a ampliar ainda mais seus conhecimentos sobre Química e suas aplicações. Boa leitura.

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Synthesis and characterization of cross-linked molecularly imprinted polyacrylamide for the extraction/preconcentration of glyphosate and aminomethylphosphonic acid from water samples

Cited by 40 publications

References 26 publications

Effect of minimizing amount of template by addition of macromolecular crowding agent on preparation of molecularly imprinted monolith

Effect of minimizing amount of template by addition of macromolecular crowding agent on preparation of molecularly imprinted monolith

Application of molecularly imprinted polymer designed for the selective extraction of ketoprofen from wastewater

Estudo Do Tratamento De Água De Um Igarapé De Manaus Utilizando Um Reator Fotocatalítico Heterogêneo Solar

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