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Parametric, equilibrium, and kinetic studies on biosorption of diuron by Anabaena sphaerica and Scenedesmus obliquus
Author(s) -
Abdel–Aty Azza M.,
GadAllah Tarek A.,
Ali Mohamed E.M.,
AbdelGhafar Hany H.
Publication year - 2014
Publication title -
environmental progress and sustainable energy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.495
H-Index - 66
eISSN - 1944-7450
pISSN - 1944-7442
DOI - 10.1002/ep.12027
Subject(s) - biosorption , scenedesmus , scenedesmus obliquus , chemistry , biomass (ecology) , algae , nuclear chemistry , monolayer , botany , environmental chemistry , chromatography , sorption , biology , adsorption , biochemistry , organic chemistry , ecology
In this study, the bioremoval potential of diuron by the cyanobacterium, Anabaena sphaerica , and the green algae, Scenedesmus obliquus, was investigated under different experimental conditions, including pH, diuron concentrations, contact time, and biomass dosage. Approximately, <80% (40 mg/L) of the analyte was removed by 1 g/L of both species within 80 min at pH = 3. The equilibrium data were well fitted to Langmuir isotherm model, indicating a probable monolayer biosorption of diuron on the biomass surface. Biosorption kinetics was best described by pseudo‐first‐order kinetic model. The biosorption mechanism of diuron over the studied biosorbents was found to be controlled by the external mass transfer. © 2014 American Institute of Chemical Engineers Environ Prog, 34: 504–511, 2015