期刊
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
卷 10, 期 1, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jece.2021.106977
关键词
Agroforestry biochars; Fixed-bed column; Venlafaxine; Trazodone; Fluoxetine
资金
- MCIN/AEI/FEDER Una manera de hacer Europa [CTM2017-87326-R]
- Xunta de Galicia [ED431C 2021/43]
- ERDF
- ERA-NET Cofund Water Works2015 Call - EU
- FCT/UEFISCDE/FORMAS through the REWATER International Research project
- Fundacao para a Ciencia e a Tecnologia (FCT Portugal)/Ministerio da Ciencia, Tecnologia e Ensino Superior (MCTES Portugal) [UIDB/50006/2020, UIDP/50006/2020]
- FCT [CEECIND/02702/2017]
- Universidade de Vigo/CISUG
- REQUIMTE/LAQV [CEECIND/02702/2017]
This study investigated the adsorption of a multicomponent mixture of active pharmaceutical compounds using a biochar fixed-bed column. The research found that eucalyptus biochar was the most effective option for removing the pollutants. The study also revealed the adsorption mechanism and its correlation with the chosen biochars. Additionally, the multicomponent system showed synergistic behavior for one compound and antagonist behavior for the other two.
In this study, the adsorption of a multicomponent mixture of active pharmaceutical compounds, such as Venlafaxine (VLX), Trazodone (TRZ) and Fluoxetine (FLX), was studied in a biochar fixed-bed column. The selection of appropriate biochar (eucalyptus, grapevine cane and holm tree biochar) as an adsorbent was carried out through batch assays. An insight into the adsorption mechanism and its correlation with the chosen biochars was performed, showing that electron donor/acceptor interaction is the main mechanism involved. Equilibrium and kinetic batch adsorption experiments were performed and the results demonstrated that eucalyptus biochar was the most viable option for the removal of the pollutants, individually and combined. Column adsorption experiments were performed and Thomas, Yoon-Nelson and Yan models were adjusted to the breakthrough curves. This multicomponent system exhibited a synergetic behavior for TRZ and an antagonist for VLX and FLX, when compared to the single and multicomponent systems previously evaluated in batch assays. The treatment of real wastewaters, spiked with pollutants, has demonstrated the removal efficiency of multicomponent mixtures. Finally, the adsorbent regeneration by elution in different solutions was also investigated and methanol proved to be the most effective eluent for the column regeneration.
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