Removal of heavy metals by biosorption
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Industrialization and urbanization have resulted in increased releases of toxic heavy metals into the natural environment comprising soils, lakes, rivers, groundwaters and oceans. Research on biosorption of heavy metals has led to the identification of a number of microbial biomass types that are extremely effective in bioconcentrating metals. Biosorption is the binding and concentration of adsorbate from aqueous solutions by certain types of inactive and dead microbial biomass. The novel types of biosorbents presently reviewed are grouped under fungal biomass, biomass of non-living, dried brown marine algae, agricultural wastes and residues, composite chitosan biosorbent prepared by coating chitosan, cellulose-based sorbents and bacterial strains. The reports discussed in this review collectively suggest the promise of biosorption as a novel and green bioremediation technique for heavy metal pollutants from contaminated natural waters and wastewaters.
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Mudhoo, A.; Garg, V.; Wang, Shaobin (2012)Industrialization, urbanization and various anthropogenic activities such as mining and agriculture have increased releases of toxic heavy metals into the natural environment such as soils, lakes, rivers, groundwaters and ...
Ismail; Znad, Hussein (2015)Biosorption is a physiochemical process which allows the biomass to passively concentrate and bind contaminants onto its cellular structure. Though using the biomass in polluted water treatment and environmental clean-up ...
Removal of Mercury (II) from Aqueous Solutions Using the Leaves of the Rambai Tree (Baccaurea motleyana)Sen, Tushar; Azman, A.; Maitra, S.; Dutta, B. (2011)This study was undertaken to evaluate the biosorption potential of a natural, low-cost biosorbent, Rambai leaves (Baccaurea motleyana), to remove trace amounts of Hg(II) from aqueous solutions. It was found that the amount ...