Esterification of M. sagu bark as an adsorbent for removal of emulsified oil
| Autor: | Zainab Ngaini, Rafeah Wahi, Thomas Shean Yaw Choong, Mohsen Mobarekeh Nourouzi, Luqman Abdullah Chuah |
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| Rok vydání: | 2014 |
| Předmět: |
Sorbent
Waste management biology Central composite design Process Chemistry and Technology biology.organism_classification Pollution chemistry.chemical_compound Adsorption chemistry Pome visual_art visual_art.visual_art_medium Chemical Engineering (miscellaneous) Metroxylon sagu Bark Stearic acid Response surface methodology Waste Management and Disposal Nuclear chemistry |
| Zdroj: | Journal of Environmental Chemical Engineering. 2:324-331 |
| ISSN: | 2213-3437 |
| DOI: | 10.1016/j.jece.2013.12.010 |
| Popis: | Sago or Metroxylon sagu, harvested in Sarawak, Malaysia, is a low-cost, natural adsorbent. The sago bark (SB) from M. sagu was investigated for adsorptive removal of emulsified oil in palm oil mill effluent (POME). Hydrophobicity of this sorbent in aqueous state was improved via esterification process. The esterification of SB was conducted at ratio of sago bark to stearic acid (SA) by 1:1, 4:1, and 7:1; percentage catalyst of 5, 10, and 15; and refluxing time 1, 4.5, and 8 h; respectively. These parameters were analysed using full central composite design (CCD) of response surface methodology (RSM). The adjusted R-squared value of 0.9509 showed that the regression model fit the data well. The predicted R-squared value (0.9168) also indicated that the prediction of experimental data was satisfactory. Hydrophobicity test, FTIR, and SEM were carried out to characterise the esterified sago bark (ESB). Results showed that esterification process successfully increased the hydrophobicity of sago bark by 42.2% and oil removal efficiency in POME by 50.2%. A developed two-factor interaction (2FI) model showed that the preparation conditions of 1:1 SB:SA, 15% catalyst, and 8 h refluxing time afforded ESB with the maximum oil removal efficiency of up to 95.52% in POME. The esterification of SB successfully improved the oil adsorptivity for the removal of emulsified oil in POME. |
| Databáze: | OpenAIRE |
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