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Abstract
This paper reports the development of the chemical and structural properties of partially pyrolyzed olive stones (OS) (at 250, 400, 500, 600, 700 and 850 °C) intended for use as a less expensive and more environmental-friendly adsorbent within water treatment applications. The following properties were followed: mass loss, surface chemistry (acid/base titrations and IR analysis), crystalline matter and elemental analysis, SEM, BET and TGA analysis. The major mass loss (68%) occurred between 250 and 400 °C. Acidic oxides disappeared after 500 °C, while surface basicity increased with increasing pyrolysis temperature. The partially pyrolyzed-non-activated OS sorbents were used for 2-chlorohenol (2-CP) removal from water, where 2-CP uptake increased with increasing pyrolysis temperature. The maximum adsorption was recorded at pH 7 using the pyrolyzed OS at 850 °C, which was only 13% more than that of OS pyrolyzed at 600 °C (sorbent carb600). So that carb600 (adsorption capacity: 34.1 mg g−1) was recommended as a cost-effective-environmental-friendly adsorbent. The re-usability of carb600 for removing 2-chlorophenol from real water sample was evident, where ∼70% of its adsorption efficiency was reserved even in the presence of competing ions.
Original language | English |
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Article number | 100209 |
Number of pages | 11 |
Journal | Emerging Contaminants |
Volume | 9 |
Issue number | 2 |
Early online date | 27 Jan 2023 |
DOIs | |
Publication status | Published - 1 Jun 2023 |
Bibliographical note
© 2023 The Authors. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY-NC-ND license(http://creativecommons.org/licenses/by-nc-nd/4.0/).
Funder
Islamic Development BankKeywords
- Olive stones
- Controlled pyrolysis
- Water treatment
- Adsorption of phenols
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Development of low cost adsorbents derived from waste materials
Newman, A. P., El-Sheikh, A. H. & Hollyoak, B.
2/09/02 → …
Project: Unfunded project
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