APPLICATION OF NATURE-BASED SORBENT PHASES IN THE MICROEXTRACTION OF EMERGING CONTAMINANTS FROM ENVIRONMENTAL SAMPLES

Daniel Arismendi Pena; Alejandra Molina Balmaceda; Valentina Rojas Candia; Juan José Triviño; Pablo Richter

Todos os Trabalhos

Trabalho

Título do Trabalho

APPLICATION OF NATURE-BASED SORBENT PHASES IN THE MICROEXTRACTION OF EMERGING CONTAMINANTS FROM ENVIRONMENTAL SAMPLES

Autores

Daniel Arismendi Pena
Alejandra Molina Balmaceda
Valentina Rojas Candia
Juan José Triviño
Pablo Richter

Modalidade

Resumo

Área temática

Novas tendências em preparo de amostras

Data de Publicação

15/04/2024

País da Publicação

Brasil

Idioma da Publicação

Português

Página do Trabalho

https://www.even3.com.br/anais/xv-laseac-x-enqamb-2024i/790892-application-of-nature-based-sorbent-phases-in-the-microextraction-of-emerging-contaminants-from-environmental-sam

ISBN

978-65-272-0404-6

Palavras-Chave

Natural sorbent phase, activated carbon, green analytical chemistry, rotating disk sorptive extraction

Resumo

In the last two decades, we have focused on the development of analytical methodologies based on microextraction technologies for the monitoring of concern emerging contaminants, quantifying many of them in wastewater, rivers, wells and even drinking and bottled water. One of the great advantages of these techniques is that they allow a high preconcentration of the analytes with excellent performance. In 2009 in our laboratory the Rotating Disk Sorptive Extraction (RDSE) technique was invented, which consists of a small Teflon disk that allows different sorbent phases to be associated for the efficient determination of analytes [1]. In recent years we have focused our research on Green Analytical Chemistry (GAC), in order to develop more environmentally sustainable methodologies through the use of biodegradable, easily accessible and reusable materials. As an alternative to commercial synthetic phases we have used, cork, peanut shell, avocado seed, banana peel and chitosan (from mollusk shells) [2-4]. These materials have been used both in their natural form and in modified, obtaining promising results in future research in analytical chemistry. Cork and chitosan have been reported in their natural form, finding excellent analytical performance for the extraction of estrogenic hormones, ibuprofen, 1-OH-Ibuprofen, triclosan and methyl triclosan. In both cases, the extraction efficiency is attributed to the formation of hydrogen bonds, p-p interactions and Van Der Waals forces between the analytes and the sorbent phase. As a measure to improve the extraction efficiency of natural phases, peanut shell, banana peel, cork and avocado seed have been exposed to a controlled pyrolysis process for the formation of activated carbon. Through this, the surface and porosity properties of natural materials, as well as the analytical performance have been improved, favoring the pore filling and p-stacking interactions. For the carbonization process, two activating agents (ZnCl2 and KOH) were evaluated at different concentrations and proportions with respect to the raw material. Furthermore, different heating temperatures were considered. In general, the activation with ZnCl2 at 600°C improves the extraction efficiency and the morphological properties of the material, reaching BET areas between 500-1500 m2/g with total pore volumes of approximately 0.2 cm3/g depending of the raw material. On the other hand, the applicability in RDSE was considered using the natural phases and the carbonized phases for determination of different emerging contaminants, finding extraction efficiencies above 80%, precision below 14% and detection limits in the order of µg/L using a GC-MS as analytical instrumentation. Comparative studies with commercial sorbent phases (Oasis-HLB, St-DVB and C18) revealed nonsignificant difference for most of the analytes studied. References [1] P. Richter, D. Arismendi, y M. Becerra-Herrera, TrAC Trends Anal. Chem. 137 (2021) 116209. [2] V. Manzo, J. Goya-Pacheco, D. Arismendi, M. Becerra- Herrera, A. Castillo-Aguirre, R. Castillo-Felices, M. Rosero-Moreano, E. Carasek, P. Richter (2019). Anal. Chim. Acta 1087 (2019) 1-10. [3] N. Torres-Lara, A. Molina-Balmaceda, D. Arismendi, P. Richter, Green Anal. Chem. 6 (2023) 100073. [4] D. Arismendi, I. Vera, I. Ahumada, P. Richter, Anal. Chim. Acta 1252 (2023), 341053.

Título do Evento: XV LASEAC - X ENQAmb 2024.
Cidade do Evento: Ouro Preto
Título dos Anais do Evento: Anais do XV LASEAC (Latin American Symposium on Environmental Analytical Chemistry) & X ENQAmb (Encontro Nacional de Química Ambiental)
Nome da Editora: Even3
Meio de Divulgação: Meio Digital

Como citar

PENA, Daniel Arismendi et al.. APPLICATION OF NATURE-BASED SORBENT PHASES IN THE MICROEXTRACTION OF EMERGING CONTAMINANTS FROM ENVIRONMENTAL SAMPLES.. In: . Disponível em: https//www.even3.com.br/anais/xv-laseac-x-enqamb-2024i/790892-APPLICATION-OF-NATURE-BASED-SORBENT-PHASES-IN-THE-MICROEXTRACTION-OF-EMERGING-CONTAMINANTS-FROM-ENVIRONMENTAL-SAM. Acesso em: 20/06/2025