NDLI: Preparation of sawdust functionalized with aspartic acid and its sorption capacity, kinetics and thermodynamics for basic dyes

Content Provider	Springer Nature Link
Author	Gong, Renmin Li, Na Ni, Shoujun Guo, Pingzhen Huang, Fenghong
Copyright Year	2010
Abstract	An ion exchanger with carboxyl groups as active sites was prepared by activating sawdust with epichlorohydrin, followed by coupling the epoxy-activated sawdust with aspartic acid. The optimal sorption condition, sorption capacity, kinetics and thermodynamics of basic dyes on sawdust ion exchanger (SIE) from aqueous solution were investigated in a batch system. Two basic dyes, methylene blue (MB) and crystal violet (CV), were selected as sorbates. The optimal pH value of MB and CV solutions for favorable sorption was pH 4 and above. The removal ratios of MB and CV on SIE increased with increasing sorbent dose but decreased with increasing dye concentration. The isothermal data of MB and CV sorbed on SIE correlated basically with the Langmuir model. The maximum sorption capacity (Q$_{m}$) of SIE for MB and CV was 222.22 and 232.56 mg/g, respectively. The sorption equilibriums of MB and CV on SIE were reached at about 9 h, and the sorption processes could be described by the pseudo-second-order kinetic model. The thermodynamic study indicated that the sorptions of MB and CV on SIE were spontaneous and endothermic at the predetermined temperatures. High temperatures were favorable for the sorption processes.
Starting Page	1560
Ending Page	1564
Page Count	5
File Format	PDF
ISSN	02561115
Journal	Korean Journal of Chemical Engineering
Volume Number	27
Issue Number	5
e-ISSN	19757220
Language	English
Publisher	Springer US
Publisher Date	2010-07-24
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Sawdust Ion Exchanger Basic Dye Sorption Kinetics Thermodynamics Biotechnology Materials Science Catalysis Industrial Chemistry/Chemical Engineering
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering

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