期刊
DYES AND PIGMENTS
卷 72, 期 2, 页码 256-266出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2005.09.001
关键词
yellow passion fruit peel; mandarin peel; methylene blue removal; biosorption; factorial design; central composite surface analysis
In order to reduce the total number of experiments for achieving the highest removal of methylene blue (MB) from aqueous solutions using yellow passion fruit peel (Passiflora edullis, F. flavicarpa) and mandarin peel (Citrus reticulata) as biosorbents two independent sets of full 2(3) factorial designs with two central points (10 experiments) were experimented. In order to continue the optimization of the system a new full 2(2) factorial design with two central points (six experiments) and a central composite surface analysis (13 experiments, divided into four cube points, five centre points, and four axial points) were employed for yellow passion fruit peel (PFP) and mandarin peel (MP), respectively. Using these statistical tools, the best conditions for MB removal from aqueous solution were initial methylene blue (C-0) of 3.20 mg l(-1), pH 9.0 for PFP and 11.0 for MP and time of contact higher than 48 h for PFP and 42.9 h for MP. (c) 2005 Elsevier Ltd. All rights reserved.
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