| Autor: |
Efthalia Georgiou, Ioannis Ioannidis, Ioannis Pashalidis, Dang Duc Viet, Toshiki Tsubota, Dimitrios Kalderis |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
Sustainable Chemistry for the Environment, Vol 4, Iss , Pp 100040- (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2949-8392 |
| DOI: |
10.1016/j.scenv.2023.100040 |
| Popis: |
Palm oil is a product of major economic importance worldwide however, palm tree cultivation generates large quantities of palm fronds as waste. In this work, the sorption of Eu3+ from aqueous solutions by oxidized biochar derived from palm tree fronds was studied at pH 3 by batch type experiments under ambient conditions. Following biochar production, the sample was oxidized using HNO3 to increase the oxygen-containing moieties on its surface. The oxidized biochar was characterized through surface and spectroscopic techniques. As indicated by the coefficient of determination value of 0.99, Eu3+ adsorption was best described by the Langmuir isotherm model. The optimum adsorption capacity was determined at qmax= 0.81 mol kg−1. Adsorption was an entropy-driven process and followed the 2nd order kinetics, reaching a plateau value of 50% relative adsorption within 60 min. Furthermore, Fourier Transform InfraRed spectroscopic data and the effect of ionic strength indicated that adsorption proceeded via the development of inner-sphere complexes between Eu3+ and the carboxylic groups on the biochar surface. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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