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Removal of cationic dyes: basic magenta and methylene blue from aqueous solution by adsorption on modified loofah

Content Provider	Springer Nature Link
Author	Yu, Jun xia Wang, Li yan Chi, Ru an Zhang, Yue fei Xu, Zhi gao Guo, Jia
Copyright Year	2012
Abstract	Modified loofah was prepared by a simple chemical graft method to improve its adsorption for cationic dyes. Experimental results showed that the maximum amounts of basic magenta and methylene blue loaded on the modified loofah were 83.5 and 85.5 mg g$^{−1}$, and that on the unmodified loofah were 22.2 and 33.7 mg g$^{−1}$, respectively. The adsorption for both dyes could reach equilibrium after 300 min. A pseudo-second-order model is suitable for describing the adsorption and desorption kinetics of both dyes on the modified sorbent. According to the intra-particle diffusion model, sorption and desorption processes for the two dyes both presented two distinct phases and were mainly controlled by intra-particle diffusion. The dye-loaded modified loofah could be regenerated by using the mixture solution of HCl and ethanol (V$_{HCl}$:V$_{ethanol}$ = 3:2) as eluent. Adsorption in the binary system showed that adsorption of the dyes was depressed by the presence of the other dye, and the two dyes could be removed efficiently when the initial concentrations were lower than 5.0 × 10$^{−5}$ mol L$^{−1}$. The Langmuir competitive model was suitable to predict the sorption isotherm in the binary system.
Starting Page	3775
Ending Page	3790
Page Count	16
File Format	PDF
ISSN	09226168
Journal	Research on Chemical Intermediates
Volume Number	39
Issue Number	8
e-ISSN	15685675
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-11-03
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Loofah Adsorption Basic magenta Methylene blue Catalysis Physical Chemistry Inorganic Chemistry
Content Type	Text
Resource Type	Article
Subject	Chemistry

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