Use of response surface methodology to optimize triclosan adsorption on alumina pillared clays in a fixed-bed column for applications in solid-phase extraction
Fecha
2023Versión
Acceso abierto / Sarbide irekia
Tipo
Artículo / Artikulua
Versión
Versión publicada / Argitaratu den bertsioa
Identificador del proyecto
Impacto
|
10.1016/j.clay.2023.106879
Resumen
Fixed-bed column studies are generally conducted to consider possible applications in water-purification processes. In this work, three synthetic alumina pillared interlayered clays (Al-PILC) were analyzed in fixed-bed
column studies for use as sorbents for solid-phase extraction (SPE) for the first time. Adsorption processes
were studied for triclosan (TCS), which is an emerging pollutant (EP) ...
[++]
Fixed-bed column studies are generally conducted to consider possible applications in water-purification processes. In this work, three synthetic alumina pillared interlayered clays (Al-PILC) were analyzed in fixed-bed
column studies for use as sorbents for solid-phase extraction (SPE) for the first time. Adsorption processes
were studied for triclosan (TCS), which is an emerging pollutant (EP) that has been shown to have several health
effects. Breakthrough curves were investigated by varying process parameters such as bed height (0.25–0.75 cm),
inlet TCS concentration (20–60 mg/cm3
), and flow rate (0.5–3 cm3
/min). Bohart-Adams, Bed Depth Service Time
(BDST), and Thomas models were satisfactory applied to the results obtained for fixed-bed columns. The
adsorption of TCS was successfully optimized for use in SPE for the three adsorbents studied using response
surface methodology with a Box–Behnken design (RSM-BBD). The models developed were adequate for the
experimental data (95% significance level), with high regression parameters (98.9–99.1). The optimum values
for TCS adsorption on the fixed-bed column were 378.04, 367.78, and 378.93 mg (amount of adsorbent packed
into the column), 0.5 cm3
/min (flow rate), 4.24, 3.96, and 3.85 (pH), and 2.56, 1.93, and 1.13 mg/dm3 (inlet
TCS concentration) for Al-PILCAE, Al-PILCBE, and Al-PILCCM, respectively. From these results synthetic Al-PILC
are effective and promising sorbents that can be used for analytical purposes in SPE, and that RSM-BDD is an
effective and reliable tool for evaluating and optimizing the adsorption conditions for emerging contaminants in
a fixed-bed column system. [--]
Materias
Adsorption,
Emerging pollutants,
Solid-phase extraction,
Response surface methodology,
Pillared clays
Editor
Elsevier
Publicado en
Applied Clay Science 235 (2023) 106879
Departamento
Universidad Pública de Navarra/Nafarroako Unibertsitate Publikoa. Institute for Advanced Materials and Mathematics - INAMAT2
Versión del editor
Entidades Financiadoras
The authors are grateful for financial support from the Spanish Ministry of Science and Innovation (MCIN/AEI/10.13039/501100011033) through project PID2020-112656RB-C21. YC thanks the Universidad Pública de Navarra for a pre-doctoral grant (IberusTalent, European Union's H2020 research and innovation program under Marie Sklodowska-Curie grant agreement N° 801586). AG also thanks Banco Santander for funding via the Research Intensification Program.