Title :
Comparison for Adsorption Modeling of Heavy Metals (Cd, Pb, Cu, Zn) from Aqueous Solution by Bio-Formulation
Author :
Chen Yun-nen ; Chai Li-yuan
Author_Institution :
Sch. of Resource & Environ. Eng., Jiangxi Univ. of Sci. & Technol., Ganzhou
Abstract :
The demand for effective and inexpensive sorbents is increasing in response to the widespread recognition of the deleterious health effects of heavy metals exposure through aqueous solutions. An adsorbent, bio-formulation (BF), was prepared by agricultural waste. The maximal biosorption removal of cadmium (II), lead(II), copper(II), zinc(II) on BF are 99.4, 99.8, 97.6, 98.3% at pH 8, 5, 5, 7, respectively. Freundlich adsorption isotherm is well fitted to the experimental data. The adsorption kinetics of heavy metals reveal that adsorption of heavy metals is very rapid within the first 30 min and equilibrium time is independent of initial concentration. The adsorption process follows second-order sorption kinetics. The biosorption mechanism may be cation exchange effect.
Keywords :
adsorption; agricultural pollution; biotechnology; cadmium; chemical hazards; copper; hazardous materials; lead; reaction kinetics; wastewater treatment; water pollution control; zinc; Cd; Cu; Freundlich adsorption isotherm; Pb; Zn; adsorption kinetics; adsorption modeling; agricultural waste; aqueous solution; bioformulation; cation exchange effect; heavy metals; maximal biosorption removal; Agricultural engineering; Biological materials; Cadmium; Copper; Kinetic theory; Lead; Magnetic separation; Production; Wastewater treatment; Zinc;
Conference_Titel :
Bioinformatics and Biomedical Engineering, 2008. ICBBE 2008. The 2nd International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-1747-6
Electronic_ISBN :
978-1-4244-1748-3
DOI :
10.1109/ICBBE.2008.1141
