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Surface modification of the Corynebacterium glutamicum biomass to increase carboxyl binding site for basic dye molecules

Paper ID Volume ID Publish Year Pages File Format Full-Text
4223 216 2009 6 PDF Available
Title
Surface modification of the Corynebacterium glutamicum biomass to increase carboxyl binding site for basic dye molecules
Abstract

The objective of this study was to develop a surface-modified biosorbent with enhanced sorption capacity of cationic dye Basic Blue 3 (BB 3). The biomass of Corynebacterium glutamicum was modified using citric acid (CA). The optimal modification conditions were the mixing of the biomass with 0.8 M citric acid solution at a 1:10 ratio, and heating at 120 °C for 3.5 h. Hydroxyl groups on the biomass surface underwent an esterification with citric acid, forming carboxyl groups which were available for cationic dye binding. From the Fourier transform infrared analysis, it was confirmed that the CA-modified biomass possessed a large amount of surface carboxyl functional groups comparing the raw biomass. The sorption capacity of BB 3 onto CA-modified biomass was 2.02 times higher than that onto the raw biomass. Furthermore, BB 3 sorbed on the CA-modified biomass was easily eluted by shifting the solution pH, making repeated sorption/desorption cycle (up to 4 times) possible without significant performance decrease. Therefore, the method developed for amplifying the carboxyl sites on the biomass surface may be a useful modification tool for the creation of a high-performance and regenerable biosorbent for the cationic dyes.

Keywords
Biosorption; Corynebacterium glutamicum; Citric acid; Modification; Basic dye
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Surface modification of the Corynebacterium glutamicum biomass to increase carboxyl binding site for basic dye molecules
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 46, Issue 1, 1 September 2009, Pages 1–6
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us