Partially pyrolyzed-non-activated olive stones: Characterization and utilization of olive stones partially-pyrolyzed at various temperatures for 2-chlorophenol removal from water

Amjad H El-Sheikh, Alan P Newman

    Research output: Contribution to journalArticlepeer-review

    2 Citations (Scopus)
    33 Downloads (Pure)

    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 languageEnglish
    Article number 100209
    Number of pages11
    JournalEmerging Contaminants
    Volume9
    Issue number2
    Early online date27 Jan 2023
    DOIs
    Publication statusPublished - 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 Bank

    Keywords

    • Olive stones
    • Controlled pyrolysis
    • Water treatment
    • Adsorption of phenols

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