Enhanced Removal of Methylene Blue from Aqueous Solution by Pummelo Peel Pretreated with Sodium Hydroxide

In the present study, pummelo peel pretreated with sodium hydroxide is used for adsorption of methylene blue (MB). In order to investigate the effects of pretreatment on the cationic dye adsorption, the kinetics and capacities of raw pummelo peel (RPP) and sodium hydroxide treated pummelo peel (TPP)...

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Bibliographic Details
Published inJournal of Health Science Vol. 55; no. 4; pp. 619 - 624
Main Authors Hu, Changwei, Li, Jianlong, Zhou, Yin, Li, Mei, Xue, Feng, Li, Huiming
Format Journal Article
LanguageEnglish
Published Tokyo The Pharmaceutical Society of Japan 2009
Pharmaceutical Society of Japan, Nihon Yakugakkai
Subjects
adsorption
methylene blue
pretreatment
pummelo peel
sodium hydroxide
wastewater
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Summary:In the present study, pummelo peel pretreated with sodium hydroxide is used for adsorption of methylene blue (MB). In order to investigate the effects of pretreatment on the cationic dye adsorption, the kinetics and capacities of raw pummelo peel (RPP) and sodium hydroxide treated pummelo peel (TPP) to remove MB from aqueous solutions were compared. The effects of various experimental parameters (e.g., initial pH, dye concentration, contact time) were also studied. According to the maximum adsorption capacity (qm) obtained, adsorption capability of pummelo peel is significantly increased after sodium hydroxide treatment. Both adsorption isotherms of RPP and sodium hydroxide TPP fitted the Langmuir model well, but not the Freundlich model. The processes of uptake followed pseudo-first order rate kinetics. The results in this study indicated that sodium hydroxide TPP is a promising adsorbent for removing MB from aqueous solution.
ISSN:1344-9702
1347-5207
DOI:10.1248/jhs.55.619