Attapulgite as Potential Adsorbent for Dissolved Organic Carbon from Oily Produced water
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 a...
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| Format: | Journal Article |
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Wiley Interscience
2015
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| Online Access: | http://hdl.handle.net/20.500.11937/20901 |
| _version_ | 1848750439792640000 |
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| author | Al. Haddabi, M. Vuthaluru, Hari Znad, Hussein Ahmed, M. |
| author_facet | Al. Haddabi, M. Vuthaluru, Hari Znad, Hussein Ahmed, M. |
| author_sort | Al. Haddabi, M. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | 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. |
| first_indexed | 2025-11-14T07:36:51Z |
| format | Journal Article |
| id | curtin-20.500.11937-20901 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:36:51Z |
| publishDate | 2015 |
| publisher | Wiley Interscience |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-209012019-02-19T05:35:00Z Attapulgite as Potential Adsorbent for Dissolved Organic Carbon from Oily Produced water Al. Haddabi, M. Vuthaluru, Hari Znad, Hussein Ahmed, M. 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. 2015 Journal Article http://hdl.handle.net/20.500.11937/20901 10.1002/clen.201500073 Wiley Interscience fulltext |
| spellingShingle | Al. Haddabi, M. Vuthaluru, Hari Znad, Hussein Ahmed, M. Attapulgite as Potential Adsorbent for Dissolved Organic Carbon from Oily Produced water |
| title | Attapulgite as Potential Adsorbent for Dissolved Organic Carbon from Oily Produced water |
| title_full | Attapulgite as Potential Adsorbent for Dissolved Organic Carbon from Oily Produced water |
| title_fullStr | Attapulgite as Potential Adsorbent for Dissolved Organic Carbon from Oily Produced water |
| title_full_unstemmed | Attapulgite as Potential Adsorbent for Dissolved Organic Carbon from Oily Produced water |
| title_short | Attapulgite as Potential Adsorbent for Dissolved Organic Carbon from Oily Produced water |
| title_sort | attapulgite as potential adsorbent for dissolved organic carbon from oily produced water |
| url | http://hdl.handle.net/20.500.11937/20901 |