Application of biochar from agro-industrial waste in solid-phase extraction for the determination of 17β-estradiol from aqueous solution

  • S. Rovani
  • L. F. Medeiros
  • E. C. Lima
  • A. N. FernandesEmail author
Original Paper


In this study, the biochar produced from coffee wastes and eucalyptus sawdust was employed as an adsorbent in solid-phase extraction devices for the determination of 17β-estradiol from aqueous solution. Parameters such as adsorbent mass, solvent type, eluent volume, ionic strength, breakthrough volume, and the cartridge reuse were evaluated. The best experimental conditions for solid-phase extraction concerning adsorbent mass, elution solvent, eluent volume, ionic strength, breakthrough volume, and cartridge reuse were established. The most suitable conditions for 1.0-mL cartridge were: mass of 50 mg, elution solvent 5.0 mL of acetonitrile/water 90:10 (v:v), 0.003 mol L−1 NaCl concentration, and 17β-estradiol solution volume 50.0 mL. The solid-phase extraction results showed that, although 17β-estradiol recovery was about 60%, the removal efficiency was 100% and the cartridges of 200 and 500 mg can be reused eight and four times, respectively, without any decrease in adsorption capacity. The results demonstrate the potential use of biochar as new adsorbent in solid-phase extraction devices for the removal of estrogens in aqueous solution.


Cartridge Charcoal Estrogen Solid waste 



The authors are grateful to the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq, Brazil), number of financial support 140643/2012-5 (Doutorado-GD), and the Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul (FAPERGS, Brazil) for financial support and fellowships. This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior—Brasil (CAPES)—Finance Code 001.

Supplementary material

13762_2019_2295_MOESM1_ESM.docx (2 mb)
Supplementary material 1 (DOCX 2017 kb)


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Copyright information

© Islamic Azad University (IAU) 2019

Authors and Affiliations

  1. 1.Instituto de QuímicaUniversidade Federal do Rio Grande do Sul (UFRGS)Porto AlegreBrazil
  2. 2.Instituto de Pesquisas Energéticas e Nucleares (IPEN-CNEN/SP)São PauloBrazil

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