원문정보
초록
영어
Biosorption is a technique that can be used for the removal of pollutants from waters, especially those that are not easily biodegradable such as metals and dyes. A variety of biomaterials can be used to bind these pollutants, including bacteria, fungi, algae, and industrial and agricultural wastes. In this study, Escherichia coli biomass, the discharge of L-phenylalanine fermentation, was employed to investigate the biosorption of Reactive Yellow 2 (RY 2). Chemical modification was carried out onto the raw E.coli biomass to increase the binding sites for reactive dye biosorption. In order to confirm the potential of the biomass of raw biomass (RB) and modified biomass (MB) sorption capacities, ion-exchanger resin (IER) was used in this study. A series of batch experiments, such as pH edge, isotherm, kinetics, and reuse experiments, were carried out. The maximum sorption capacities of three sorbents were estimated using the Langmuir equation at pH 3. The uptakes of RY 2 were as: MB (326 mg/g) > RB (214 mg/g) >> IER (41.8 mg/g). Moreover, the desorption efficiency of IER was insufficient (25%) compared with that of RB (nearly 100%) and MB (92%), indicating that the biosorbents based on the E. coli has a potential to be regenerated.