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Hybrid process of adsorption and electrochemically based green regeneration of bentonite clay for ofloxacin and ciprofloxacin removal.
Antonelli, Raissa; Malpass, Geoffroy Roger Pointer; da Silva, Meuris Gurgel Carlos; Vieira, Melissa Gurgel Adeodato.
Afiliação
  • Antonelli R; School of Chemical Engineering, University of Campinas, Albert Einstein, 500, Campinas, São Paulo, 13083-852, Brazil. antonelliraissa@gmail.com.
  • Malpass GRP; Present address: Department of Chemical Engineering, Polytechnic School of the University of São Paulo, São Paulo, 05508-000, Brazil. antonelliraissa@gmail.com.
  • da Silva MGC; Department of Chemical Engineering, Federal University of the Triângulo Mineiro, Randolfo Borges Júnior, 1400, Uberaba, Minas Gerais, 38064-200, Brazil.
  • Vieira MGA; School of Chemical Engineering, University of Campinas, Albert Einstein, 500, Campinas, São Paulo, 13083-852, Brazil.
Environ Sci Pollut Res Int ; 30(18): 53648-53661, 2023 Apr.
Article em En | MEDLINE | ID: mdl-36862291
Removal of emerging contaminants, such as antibiotics, from wastewater by adsorption is a simple, low-cost, and high-performance process; however, regeneration and reuse of the exhausted adsorbent are necessary to make the process economically viable. This study aimed to investigate the possibility of electrochemical-based regeneration of clay-type materials. For this, the calcined Verde-lodo (CVL) clay was saturated with the antibiotics ofloxacin (OFL) and ciprofloxacin (CIP) in one-component systems by an adsorption process and then subjected to photo-assisted electrochemical oxidation (0.45 A, 0.05 mol/L NaCl, UV-254 nm, and 60 min), which promotes both pollutant degradation and adsorbent regeneration. The external surface of the CVL clay was investigated by X-ray photoelectron spectroscopy before and after the adsorption process. The influence of regeneration time was evaluated for the CVL clay/OFL and CVL clay/CIP systems, and the results demonstrate high regeneration efficiencies after 1 h of photo-assisted electrochemical oxidation. Clay stability during regeneration was investigated by four successive cycles in different aqueous matrices (ultrapure water, synthetic urine, and river water). The results indicated that the CVL clay is relatively stable under the photo-assisted electrochemical regeneration process. Furthermore, CVL clay was able to remove antibiotics even in the presence of natural interfering agents. The hybrid adsorption/oxidation process applied here demonstrated the electrochemical-based regeneration potential of CVL clay for the treatment of emerging contaminants, since it can be operated quickly (1h of treatment) and with lower consumption of energy (3.93 kWh kg-1) than the traditional method of thermal regeneration (10 kWh kg-1).
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Poluentes Químicos da Água / Bentonita Idioma: En Revista: Environ Sci Pollut Res Int Assunto da revista: SAUDE AMBIENTAL / TOXICOLOGIA Ano de publicação: 2023 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 / Bentonita Idioma: En Revista: Environ Sci Pollut Res Int Assunto da revista: SAUDE AMBIENTAL / TOXICOLOGIA Ano de publicação: 2023 Tipo de documento: Article País de afiliação: Brasil País de publicação: Alemanha