Heavy metal adsorption onto agro-based waste materials: A review

Adsorption has been proved to be an excellent way to treat industrial waste effluents, offering significant advantages like the low-cost, availability, profitability, easy of operation and efficiency. Biosorption of heavy metals from aqueous solutions is a relatively new process that has proven very...

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Bibliographic Details
Published in:Journal of hazardous materials 2008-09, Vol.157 (2), p.220-229
Main Author: Demirbas, Ayhan
Format: Article
Language:English
Subjects:
Adsorption
Agro waste material
Applied sciences
Biological and medical sciences
Biomass
Biosorption
Biotechnology
Chemical engineering
Exact sciences and technology
Fundamental and applied biological sciences. Psychology
General purification processes
Heavy metal ion
Lignin - chemistry
Metals, Heavy - chemistry
Metals, Heavy - isolation & purification
Methods. Procedures. Technologies
Molecular Conformation
Other industrial wastes. Sewage sludge
Others
Pollution
Various methods and equipments
Waste Management - methods
Wastes
Wastewaters
Water treatment and pollution
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Summary:Adsorption has been proved to be an excellent way to treat industrial waste effluents, offering significant advantages like the low-cost, availability, profitability, easy of operation and efficiency. Biosorption of heavy metals from aqueous solutions is a relatively new process that has proven very promising in the removal of contaminants from aqueous effluents. Biosorption is becoming a potential alternative to the existing technologies for the removal and/or recovery of toxic metals from wastewater. The major advantages of biosorption technology are its effectiveness in reducing the concentration of heavy metal ions to very low levels and the use of inexpensive biosorbent materials. Metal adsorption and biosorption onto agricultural wastes is a rather complex process affected by several factors. Mechanisms involved in the biosorption process include chemisorption, complexation, adsorption–complexation on surface and pores, ion exchange, microprecipitation, heavy metal hydroxide condensation onto the biosurface, and surface adsorption.
ISSN:0304-3894
1873-3336
DOI:10.1016/j.jhazmat.2008.01.024