Volume : IV, Issue : III, March - 2014

Studies On Biosorption Process For Removing Heavy Metals From Aqueous Effluent By A Bacterial Extracellular Polymeric Substance

Ashruta Gawali, V. D. Nanoty, U. K. Bhalekar

Abstract :

Bioremediation of heavy metal pollution remains a major challenge in environmental Biotechnology. Some industrial processes results in the release of heavy metals into aquatic systems. This has led to increasing concern about the effect of toxic heavy metals as environmental pollutants. One of the approaches considered for application involves biosorption either to biomass or to isolated biopolymers, as a more economical, effective and safe alternative to conventional processes. Many bacterial polysaccharides have been shown to bind heavy metals with varying degrees of specificity and affinity. The adsorption of heavy metals by extracellular polymeric substances (EPS) is non–metabolism, energy independent and can be caused by interaction between metal cations and negative charge of acidic functional groups of EPS. In this work, a experiment was carried out to investigate the ability of adsorption of three different metals – Cd , Zn and Cu – by an EPS produced by a strain of Pseudomonas sp. EPS concentration and adsorption time were varied, in order to determine the ideal conditions to remove these metal cations from aqueous solutions. Results showed that the EPS is efficient to adsorb cadmium, zinc, and copper from the system. The extracellular polymeric substance produced by Pseudomonas sp was shown to be a good adsorbent, capable to remove cadmium, zinc, and copper from an aqueous system, with removal efficiencies of 66.4, 69.8, and 72.2% of each metal, respectively

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Article: Download PDF   DOI : 10.36106/ijar  

Cite This Article:

Ashruta Gawali, V.D.Nanoty, U.K.Bhalekar : “Studies On Biosorption Process For Removing Heavy Metals From Aqueous Effluent By A Bacterial Extracellular Polymeric Substance” Indian Journal of Applied Research, Vol.IV, Issue. III


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