Adsorption of Methylene Blue in Water onto Activated Carbon by Surfactant Modification

In this paper, the enhanced adsorption of methylene blue (MB) dye ion on the activated carbon (AC) modified by three surfactants in aqueous solution was researched. Anionic surfactants—sodium lauryl sulfate (SLS) and sodium dodecyl sulfonate (SDS)—and cationic surfactant—hexadecyl trimethyl ammonium...

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Bibliographic Details
Published in:Water (Basel) 2020-02, Vol.12 (2), p.587
Main Authors: Kuang, Yu, Zhang, Xiaoping, Zhou, Shaoqi
Format: Article
Language:English
Subjects:
Adsorption
Analysis
Dye industry
Methylene blue
Surface active agents
Wastewater
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Summary:In this paper, the enhanced adsorption of methylene blue (MB) dye ion on the activated carbon (AC) modified by three surfactants in aqueous solution was researched. Anionic surfactants—sodium lauryl sulfate (SLS) and sodium dodecyl sulfonate (SDS)—and cationic surfactant—hexadecyl trimethyl ammonium bromide (CTAB)—were used for the modification of AC. This work showed that the adsorption performance of cationic dye by activated carbon modified by anionic surfactants (SLS) was significantly improved, whereas the adsorption performance of cationic dye by activated carbon modified by cationic surfactant (CTAB) was reduced. In addition, the effects of initial MB concentration, AC dosage, pH, reaction time, temperature, real water samples, and additive salts on the adsorption were studied. When Na+, K+, Ca2+, NH4+, and Mg2+ were present in the MB dye solution, the effect of these cations was negligible on the adsorption (
ISSN:2073-4441
2073-4441
DOI:10.3390/w12020587