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Experimental and modeling of potassium diclofenac uptake on activated carbon.
de Azevedo, Cristiane Ferraz; de Souza, Nicholas Fernandes; Cardoso, Frantchescole Borges; Fuhr, Ana Carolina Ferreira Piazzi; Lima, Eder Claudio; Osório, Alice Gonçalves; Machado Machado, Fernando.
Afiliação
  • de Azevedo CF; Materials Science and Engineering Graduate Program, Federal University of Pelotas (UFPel), 1 Gomes Carneiro St., Pelotas, RS, 96010-610, Brazil.
  • de Souza NF; Technology Development Center, Federal University of Pelotas (UFPel), 1 Gomes Carneiro St., Pelotas, RS, 96010-610, Brazil.
  • Cardoso FB; Materials Science and Engineering Graduate Program, Federal University of Pelotas (UFPel), 1 Gomes Carneiro St., Pelotas, RS, 96010-610, Brazil.
  • Fuhr ACFP; Technology Development Center, Federal University of Pelotas (UFPel), 1 Gomes Carneiro St., Pelotas, RS, 96010-610, Brazil.
  • Lima EC; Materials Science and Engineering Graduate Program, Federal University of Pelotas (UFPel), 1 Gomes Carneiro St., Pelotas, RS, 96010-610, Brazil.
  • Osório AG; Technology Development Center, Federal University of Pelotas (UFPel), 1 Gomes Carneiro St., Pelotas, RS, 96010-610, Brazil.
  • Machado Machado F; Materials Science and Engineering Graduate Program, Federal University of Pelotas (UFPel), 1 Gomes Carneiro St., Pelotas, RS, 96010-610, Brazil.
Environ Sci Pollut Res Int ; 31(35): 48650-48662, 2024 Jul.
Article em En | MEDLINE | ID: mdl-39037628
ABSTRACT
The presence of pharmaceuticals in wastewater resulting from human activities has driven researchers to explore effective treatment methods such as adsorption using activated carbon (AC). While AC shows promise as an adsorbent, further studies are essential to comprehend its entire interaction with pharmaceuticals. This article investigates the adsorption of potassium diclofenac (PD) onto AC using experimental and modeling approaches. Batch adsorption studies coupled with Fourier transform infrared spectroscopy (FTIR) were employed to clarify the adsorption mechanism of PD on AC. Various kinetic and isotherm adsorption models were applied to analyze the adsorbent-adsorbate interaction. The kinetics were best described by Avrami's fractional order (AFO) nonlinear model. Also, the intraparticle diffusion (IP) model reveals a three-stage adsorption process. The experimental equilibrium data fitted well with the three-parameter nonlinear Liu model, indicating a maximum adsorption capacity (Qmax) of 88.45 mg g-1 and suggesting monolayer or multilayer adsorption. Thermodynamic analysis showed favorable adsorption (ΔG° < 0), with an enthalpy change (ΔH° = -30.85 kJ mol-1) characteristic of physisorption involving hydrogen bonds and π-π interactions. The adsorption mechanism was attributed to forming a double layer (adsorbate-adsorbent and adsorbate-adsorbate).
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Poluentes Químicos da Água / Carvão Vegetal / Diclofenaco Idioma: En Revista: Environ Sci Pollut Res Int Assunto da revista: SAUDE AMBIENTAL / TOXICOLOGIA Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Brasil País de publicação: Alemanha
Texto completo
Adicionar na Minha BVS
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XML
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Poluentes Químicos da Água / Carvão Vegetal / Diclofenaco Idioma: En Revista: Environ Sci Pollut Res Int Assunto da revista: SAUDE AMBIENTAL / TOXICOLOGIA Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Brasil País de publicação: Alemanha