Abstract：
:In this study the biosorption of Yellow RL, a metal-complex anionic dye, by dried Rhizopus arrhizus, a filamentous fungus, was investigated as a function of initial solution pH, initial dye concentration and initial salt (sodium chloride) concentration. The fungus exhibited the maximal dye uptake at pH 2 in the absence and in the presence of salt. Dye uptake increased with the dye concentration up to 1000 mg l(-1) and diminished considerably in the presence of increasing concentrations of salt up to 50 g l(-1). The fungus biosorbed 85.4 mg dye g(-1)of dried biomass at 100 mg l(-1) initial dye concentration in the absence of salt. When 50 g l(-1) salt was added to the biosorption medium, this value dropped to 60.8 mg g(-1) resulting in 28.8% reduction in biosorption capacity. The Redlich-Peterson and Langmuir-Freundlich were the most suitable adsorption models for describing the biosorption equilibrium data of the dye both individually and in salt containing medium. The pseudo-second-order and saturation type kinetic models depicted the biosorption kinetics accurately for all cases studied. Equilibrium and kinetic constants varied with the level of salt were expressed as a function of salt concentration.
journal_name
J Environ Managejournal_title
Journal of environmental managementauthors
Aksu Z,Balibek Edoi
10.1016/j.jenvman.2010.02.026subject
Has Abstractpub_date
2010-07-01 00:00:00pages
1546-55issue
7eissn
0301-4797issn
1095-8630pii
S0301-4797(10)00054-Xjournal_volume
91pub_type
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journal_title：Journal of environmental management
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