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

Article

Wongcharee, Surachai, Aravinthan, Vasantha and Erdei, Laszlo. 2019. "Mesoporous activated carbon-zeolite composite prepared from waste macadamia nut shell and synthetic faujasite." Chinese Journal of Chemical Engineering. 27 (1), pp. 226-236. https://doi.org/10.1016/j.cjche.2018.06.024
Article Title

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

ERA Journal ID3866
Article CategoryArticle
AuthorsWongcharee, Surachai (Author), Aravinthan, Vasantha (Author) and Erdei, Laszlo (Author)
Journal TitleChinese Journal of Chemical Engineering
Journal Citation27 (1), pp. 226-236
Number of Pages11
Year2019
ISSN0892-0370
1000-9027
1004-9541
Digital Object Identifier (DOI)https://doi.org/10.1016/j.cjche.2018.06.024
Web Address (URL)https://www.sciencedirect.com/science/article/pii/S1004954118300260
Abstract

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.

Keywordsactivated carbon; adsorption; synthetic faujasite; functional composite; methylene blue
ANZSRC Field of Research 2020401199. Environmental engineering not elsewhere classified
401102. Environmentally sustainable engineering
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Byline AffiliationsSchool of Civil Engineering and Surveying
Institution of OriginUniversity of Southern Queensland
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