Examination of Pb2+ bio-sorption onto Rhodotorula mucilaginosa using response surface methodology

With the rapid industrial development, wastewater has been a risk for environmental contamination. We aimed to explore the optimum condition and mechanism of Pb2+ bio-sorption onto Rhodotorula mucilaginosa WT6-5. Optimization of initial concentration of Pb2+, initial pH, and adsorption time for Pb2+...

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Bibliographic Details
Published in:Water science and technology 2015-01, Vol.72 (5), p.810-816
Main Authors: Jiang, Bin-hui, Zhao, Yan, Zhao, Xin, Hu, Xiao-min, Li, Li
Format: Article
Language:English
Subjects:
Adsorption
Algae
Analytical methods
Aqueous solutions
Biological effects
Biomass
Capacity
Carotenoids
Contamination
Desalination
Detection
Electron microscopy
Energy consumption
Environmental risk
Environmental science
Equilibrium
Field emission microscopy
Fluorescence
Fourier transforms
Functional groups
Hazardous materials
Heavy metals
Hydrogen-Ion Concentration
Industrial development
Infrared analysis
Infrared spectroscopy
Ion Exchange
Lead
Lead - isolation & purification
Methods
Microscopy, Electron, Scanning
Morphology
Optimization
pH effects
Response surface methodology
Rhodotorula - chemistry
Rhodotorula mucilaginosa
Scanning electron microscopy
Sorption
Spectroscopic analysis
Spectroscopy, Fourier Transform Infrared
Statistics as Topic
Sugarcane
Surface chemistry
Waste Water
Wastewater
Water Pollutants, Chemical - isolation & purification
X ray fluorescence analysis
X-ray fluorescence
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Summary:With the rapid industrial development, wastewater has been a risk for environmental contamination. We aimed to explore the optimum condition and mechanism of Pb2+ bio-sorption onto Rhodotorula mucilaginosa WT6-5. Optimization of initial concentration of Pb2+, initial pH, and adsorption time for Pb2+ bio-sorption onto R. mucilaginosa WT6-5 was performed using response surface methodology. Field emission scanning electron microscopy, energy dispersive X-ray detection, X-ray fluorescence and Fourier transform infrared spectroscopy were used to analyze the mechanisms and characteristics of Pb2+ bio-sorption. A maximum Pb2+ bio-sorption capacity of 1.45 mg/g was obtained under the optimal conditions of initial concentration of Pb2+ (30 mg/L), initial pH (5.45) and adsorption time (25 minutes). Some Pb2+ remained after adsorption, and the -OH, -C=O and C-O functional groups were primarily involved in Pb2+ bio-sorption onto R. mucilaginosa WT6-5. The mechanism of Pb2+ bio-sorption involved chemical and biological actions, ion exchange and functional groups effects.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2015.275