The effect of biomass concentration on polymer alginate in the immobilized biosorbent formation during the sorption processof heavy metal Cu2+

4th International Seminar on Sustainable Urban Development

地球科学;经济学

Rinanti, A.^1 ; Jonathan, D.^1 ; Silalahi, M.D.S.^1 ; Fachrul, M.F.^1 ; Hadisoebroto, R.^1

Environmental Engineering Department, Faculty of Architecture Landscape and Environmental Technology, Universitas Trisakti, Jakarta, Indonesia^1

关键词: Alginate polymers;    Biomass concentrations;    Biosorbents;    Break through curve;    Efficiency of removal;    Environmental biotechnology;    Micro-algae;    Scenedesmus quadricauda;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/106/1/012094/pdf
DOI  :  10.1088/1755-1315/106/1/012094

来源: IOP

【 摘 要 】

A research in environmental biotechnology has been done to analysis adsorption of ion Cu2+by biomass of microalgae (Chlorella sp, Ankistrodesmus braunii, Scenedesmus quadricauda) and Saccharomyces cerevisiae onto alginate polymeras immobilized biosorbent on laboratory scale. The purpose of this study is to achieve the optimum biomass concentration which gives the best biosorption performance. Biosorption of Cu2+was carried out in continuous fixed-bed column reactor system, volume of 1.5 L, equipped with peristaltic pump with a flow rate of 13 mL/min. Biosorption of Cu2+was investigated using immobilized biosorbent with concentration of (g biomass/g polymer) 0.25; 0.5; 1, at pH4,initial concentration Cu2+15 mg/L and 26°C±1. The results of this study showed that the increasing of biomass concentration (0 to 0.5 g/g) would result in better biosorption performance but soon decreased its performance at biomass concentration of 1 g/g. Biosorption capacity and highest removal efficiency of 0.1025 mg Cu2+/g biosorbent and 66.36% occurred by immobilized biosorbent with 0.5 g/g concentration. The connection between the variation of biomass concentration in alginate to the biosorption performance by immobilized biosorbent shown by breakthrough curve, total adsorbed metal mass(qtotal), efficiency of removal (%R) and biosorption capacity at breakthrough(qe). Excessive biomass concentrations lead to reduced porosity of the beads thus slowing down the adsorption process.