| 초록 |
Recently, dyes have generated great public concern due to their contamination in aqueous environment. Among the treatment techniques for the removal of dyes, biosorption has been proved to become a useful alternative to other methods. This study aimed at utilizing waste microbial biomass from lysine fermentation process as a renewable and low cost biosorbent. The research also attempted to develop a surface-activated biosorbent with enhanced sorption capacity and binding affinity. The FTIR and potentiometric revealed that there were three functional groups (e.g. carboxyl, phosphate and amine) responsible for the binding of dye molecules. The binding sites for reactive dye (RR4) were identified to be primary amine groups present in the biomass. Therefore, in order to improve the sorption capacity of Corynebacterium glutamicum, a chemical modification involved the addition of amine groups and removal of carboxyl groups was performed. The obtained results showed that the activated biosorbent possessed superior sorption performance in comparison with the original raw biomass. |
