Biosorption of Cr(VI) in Aqueous Solution using Microorganisms: Comparison of the Use of Rhizopus oryzae, Bacillus firmus, and Trichoderma viride

International Conference on Chemistry and Material Science 2017

化学;材料科学

Safitri, Anna^1 ; Mahardini, Putri^1 ; Prasetyawan, Sasangka^1 ; Roosdiana, Anna^1

Department of Chemistry, Brawijaya University, Malang, Indonesia^1

关键词: Adsorption capacities;    Bacillus firmus;    Biosorption process;    Equilibrium concentration;    Initial concentration;    Optimum conditions;    Rhizopus oryzae;    Trichoderma viride;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/299/1/012023/pdf
DOI  :  10.1088/1757-899X/299/1/012023

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In this work, the study of biosorption of Cr(VI) from aqueous solution was conducted using Rhizopus oryzae, Bacillus firmus, and Trichoderma viride as microorganisms that can absorb Cr(VI). The research is focused on determination of optimum conditions including pH, the number of R. oryzae, B. firmus, and T. viride (inoculums), and initial concentrations of Cr(VI) used. Optimum pH was obtained at pH 5, 4.5 and 6, for biosorption of Cr(VI) with R. oryzae, B. firmus, and T. viride, respectively, in the capacity of 45.3%, 24.5%, and 90.3%. The highest amount of Cr(VI) adsorbed for biosorption with R. oryzae, B. firmus, and T. viride, were 55.4%, 18.5%, and 74.5%, respectively, using 6-mL inoculums. The equilibrium concentrations achieved for R. oryzae, B. firmus, and T. viride were 60 mg/mL, 40 mg/mL, and 40 mg/mL, with the amount of Cr(VI) adsorbed were 32.4%, 28.2%, and 89.3%, respectively. The adsorption capacity for R. oryzae, B. firmus, and T. viride were 45.3 mg/1×106colonies, 36.2 mg/1×106cells, and 77.8 mg/1×106colonies, respectively. Overall, the biosorbents effectivity order in the biosorption process of Cr(VI) are T. viride > R. oryzae > B. firmus.