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    Attapulgite as Potential Adsorbent for Dissolved Organic Carbon from Oily Produced water

    229625.pdf (1.521Mb)
    Access Status
    Open access
    Authors
    Al. Haddabi, M.
    Vuthaluru, Hari
    Znad, Hussein
    Ahmed, M.
    Date
    2015
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Al. Haddabi and Vuthaluru, H. and Znad, H. and Ahmed, M. 2015. Attapulgite as Potential Adsorbent for Dissolved Organic Carbon from Oily Produced water. Clean: Soil Air Water. 43 (11): pp. 1522-1530.
    Source Title
    Clean Soil Air Water
    DOI
    10.1002/clen.201500073
    ISSN
    1863-0650
    School
    Department of Chemical Engineering
    Remarks

    This is the peer reviewed version of the following article: Al. Haddabi and Vuthaluru, H. and Znad, H. and Ahmed, M. 2015. Attapulgite as Potential Adsorbent for Dissolved Organic Carbon from Oily Produced water. Clean Soil Air Water. [In Press], which has been published in final form at http://doi.org/10.1002/clen.201500073. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving at http://olabout.wiley.com/WileyCDA/Section/id-820227.html#terms

    URI
    http://hdl.handle.net/20.500.11937/20901
    Collection
    • Curtin Research Publications
    Abstract

    The adsorption capacity of attapulgite, a natural clay, for the removal of dissolved organic carbon (DOC) from oily water was investigated in a batch system. The aim of this study was to understand the mechanism associated with the removal of DOC by attapulgite. The effectiveness of attapulgite to adsorb DOC was investigated as a function of equilibrium time, initial DOC concentration, solution pH, temperature, and attapulgite concentration. Two particle sizes of attapulgite were used, granular (1 mm) and powder (0.25 mm). In most cases the equilibrium data fit best with the Langmuir isotherm. The maximum monolayer coverage was found to be 31 mg/g for granular and 65 mg/g for powder attapulgite. The separation factor, RL, from the Langmuir isotherm and, n, the constant from the Freundlich isotherm indicated favorable adsorption. Changes in the pH of the oily water had no significant influence on the adsorption capacity. The adsorption follows the pseudo-second order model. The governing transport mechanisms in the sorption process appear to be both external mass transfer and intra-particle diffusion. The adsorption process was found exothermic in nature. The Langmuir isotherm model equation was adopted to design a single-stage batch absorber for DOC adsorption onto attapulgite. The study demonstrated that attapulgite can be utilized as a potential alternative low-cost adsorbent for the removal of DOC from oily water.

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