Mesoporous activated carbon-zeolite composite prepared from waste macadamia nut shell and synthetic faujasite

Wongcharee, Surachai and Aravinthan, Vasantha and Erdei, Laszlo (2018) Mesoporous activated carbon-zeolite composite prepared from waste macadamia nut shell and synthetic faujasite. Chinese Journal of Chemical Engineering. ISSN 1004-9541


Novel activated carbon-zeolite composite adsorbent was prepared from macadamia shell bio-waste and synthetic zeolite X using hydrothermal treatment. Characterization studies revealed mainly mesoporous structure with 418 m2 g-1 BET surface area with faujasite clusters on the carbon carrier. Sorption capacity for methylene blue model pollutant increased from 85 to 97 mg g-1 with the temperature increase from 25 to 45 oC, and improved with increasing pH. Nonlinear regression analyses found accurate fit to the pseudo-first-order kinetics model and intra-particle diffusion rate controlling mechanism. Excellent fits to the Jovanovic isotherm model indicated monolayer coverage on chiefly homotattic surfaces with variable potential. The thermodynamic analysis confirmed spontaneous and endothermic physisorption process. The spent adsorbent was regenerated with 20% capacity loss over five reuse cycles.Although the adsorbent was developed for ammonia, heavy metal and organic matter removal from water sources, the results also indicate good performance in cationic dye removal from wastewaters.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: No
Item Status: Live Archive
Additional Information: Published online 30 June 2018. Permanent restricted access to ArticleFirst version, in accordance with the copyright policy of the publisher.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying
Date Deposited: 31 Aug 2018 05:02
Last Modified: 21 Sep 2018 05:45
Uncontrolled Keywords: activated carbon; adsorption; synthetic faujasite; functional composite; methylene blue
Fields of Research : 09 Engineering > 0907 Environmental Engineering > 090702 Environmental Engineering Modelling
09 Engineering > 0907 Environmental Engineering > 090703 Environmental Technologies
Identification Number or DOI: 10.1016/j.cjche.2018.06.024

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