Bacterial Biosorbents for Detoxification of Heavy Metals from Aqueous Solution: A Review
摘要：
Discharge of industrial wastewater contaminated with heavy metals is a severe socio-environmental problem. Since, it is impossible to degrade toxic metals by any means, only way left for their treatment is their concentration and safe disposal in the environment. Literature shows vast array of biomaterials such as bacteria, algae, fungi and yeasts which could be employed for heavy metal removal and recovery due to their excellent performance, low cost and large available quantities. Biosorption is a typically metal-biomass interaction process involving binding of sorbate to sorbent of biological origin. The industrial effluents contaminated with heavy metals are the reservoir of unusual bacteria which are well adapted to their environment and possess various mechanisms to resist metal toxicity. Bacteria are capable of accumulating metal ions due to metal attracting composition on their cell wall or via metal- dependent intracellular metal uptake mechanisms. This review mainly focus on bacteria's cellular structure, biosorption performance, their mechanisms towards metal tolerance, modeling of biosorption and industrial applicability. Thus this article reviews the current status of bacteria as biosorbent and hopes to enlighten the future research.
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年份：
2011
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