title: Multi-responses optimization of simultaneous biosorption of cationic dyes by live yeast Yarrowia lipolytica 70562 from binary solution: Application of first order derivative spectrophotometry.
abstract: Present study is based on application of live yeast Yarrowia lipolytica 70562 as new biosorbent was investigated for the simultaneous biosorption of Crystal Violet (CV) and Brilliant Green (BG) from wastewater. The effect of operating parameters such as initial dye concentrations (6-14mgL-1), solution pH (4.0-8.0) and contact time (4-20h) was investigated by response surface methodology (RSM) for modeling and optimization of biosorption process and accordingly the best operational conditions was set as: initial CV and BG concentration of 8.0, and 10mgL-1, pH of 7.0 and contact time of 16h. Above specified conditions lead to achievement of maximum biosorption of 98.823% and 99.927% for CV and BG dyes, respectively. The experimental equilibrium data well explained according to Langmuir isotherm model with maximum biosorption capacity of 65.359 and 56.497mgg-1for BG and CV, respectively. The second order and intraparticle diffusion models as cooperative mechanism has high efficiency and performance for interpretation of real data.
authors.affiliation: Chemistry Department, Yasouj University, Yasouj 75918-74831, Iran.
authors.forename: Ebrahim Alipanahpour
authors.initials: EA
authors.lastname: Dil
authors.affiliation: Chemistry Department, Yasouj University, Yasouj 75918-74831, Iran. Electronic address: m_ghaedi@mail.yu.ac.ir.
authors.forename: Mehrorang
authors.initials: M
authors.lastname: Ghaedi
authors.affiliation: Biology Department, Faculty of Science, Shahid Chamran University of Ahvaz, 61357-83135, Ahvaz, Iran. Electronic address: gh.r.ghezelbash@gmail.com.
authors.forename: Gholam Reza
authors.initials: GR
authors.lastname: Ghezelbash
authors.affiliation: Chemistry Department, Yasouj University, Yasouj 75918-74831, Iran.
authors.forename: Arash
authors.initials: A
authors.lastname: Asfaram
mesh_terms: D000327:Adsorption; D002412:Cations; D004396:Coloring Agents / Q000737:chemistry*; D004058:Diffusion; D005840:Gentian Violet / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008962:Models, Theoretical; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*; D062065:Wastewater; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D025062:Yarrowia
chemical_list: D002412:Cations; D004396:Coloring Agents; D005840:Gentian Violet; D000644:Quaternary Ammonium Compounds; D062065:Wastewater; D014874:Water Pollutants, Chemical; C006798:brilliant green
keywords: Brilliant green; Crystal Violet; Experimental design; Live yeast Yarrowia lipolytica 70562; Multi-responses optimization; Simultaneous biosorption