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A novel spherical sulfonic lignin adsorbent, denoted as SSLA, was adopted to removal and recover the cationic dyes from aqueous solutions, e.g., Cationic Red GTL, Cationic Turquoise GB, and Cationic Yellow X-5GL, and various affecting factors were optimized. It was found that the adsorption of cationic dyes on the adsorbent was initially concentration- and temperature-dependent, and followed both the Freundlich and Langmuir isothermal adsorption. The positives values for AH indicated that the process was enclothermic. The breakthrough adsorption capacities for GTL, GB, and X-5GL were 536.0, 550.0, and 582.0 mg/g, respectively, which prevailed over the commercial powdered activated carbon and strongly acidic cation-exchange resin R732 evidently. Additionally, the maximum recovery percentage could reach 93.2, 97.1, and 96.5% separately for GTL, GB, and X-5GL, when a mixture of 3.0 mol/L HCl and alcohol with the volume ratio of 1: 4 was adopted as eluant. Moreover, the results of the mobile desorption and recovery tests indicated that the maximum concentrations of GTL, GB, and X-5GL in the eluants, could reach 13,108, 13,980, and 13,520 mg/L, respectively. Only 6.3, 5.0, and 4.6% of adsorption capacities for GTL, GB, and X-5GL decreases individually after 20 replicates of adsorption and desorption. (c) 2006 Wiley Periodicals, Inc.
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JOURNAL OF APPLIED POLYMER SCIENCE
ISSN: 0021-8995
Year: 2006
Issue: 4
Volume: 101
Page: 2284-2291
1 . 3 0 6
JCR@2006
2 . 7 0 0
JCR@2023
ESI Discipline: CHEMISTRY;
JCR Journal Grade:2
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ESI Highly Cited Papers on the List: 0 Unfold All
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30 Days PV: 0
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