Abstract：
:Batch experiments were conducted to study the biosorption characteristics of a cationic dye, Malachite Green (MG), onto aerobic granules. Effects of pH, aerobic granule dosage, contact time and solution temperature on MG biosorption by aerobic granules were evaluated. Simultaneity the thermodynamic analysis was also performed. The results showed that alkaline pH was favorable for the biosorption of MG and chemisorption seemed to play a major role in the biosorption process. Kinetic studies indicate that MG biosorption on aerobic granules in the system follows the pseudo-second order kinetics. The equilibrium time was 60 min for both 50 and 60 mg/L and 120 min for both 70 and 80 mg/L MG concentrations, respectively. Moreover, the experimental equilibrium data have been analyzed using the linearized forms of Langmuir, Freundlich, and Redlich-Peterson isotherms and the Langmuir isotherm was found to provide the best theoretical correlation of the experimental data for the biosorption of MG. The monolayer biosorption (saturation) capacities were determined to be 56.8 mg of MG per gram of aerobic granules at 30 degrees C. Thermodynamic analysis show that biosorption follows an endothermic path of the positive value of Delta H( composite function) and spontaneous with negative value of Delta G( composite function).
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Sun XF,Wang SG,Liu XW,Gong WX,Bao N,Gao BY,Zhang HYdoi
10.1016/j.biortech.2007.07.055subject
Has Abstractpub_date
2008-06-01 00:00:00pages
3475-83issue
9eissn
0960-8524issn
1873-2976pii
S0960-8524(07)00616-5journal_volume
99pub_type
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