Microbial Aspects of Acid Generation and Bioremediation with Relevance to Indian Mining


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The role of Acidithiobacillus group of bacteria in acid generation and heavy metal dissolution was studied with relevance to some Indian mines. Microorganisms implicated in acid generation such as Acidithiobacillus ferrooxidans, Acidithiobacillus thiooxidans and Leptospirillum ferrooxidans were isolated from abandoned mines, waste rocks and tailing dumps. Arsenite oxidizing Thiomonas and Bacillus group of bacteria were isolated and their ability to oxidize As (III) to As (V) established. Mine isolated Sulfate reducing bacteria were used to remove dissolved copper, zinc, iron and arsenic from solutions.



Advanced Materials Research (Volumes 71-73)

Edited by:

Edgardo R. Donati, Marisa R. Viera, Eduardo L. Tavani, María A. Giaveno, Teresa L. Lavalle, Patricia A. Chiacchiarini




K.A. Natarajan, "Microbial Aspects of Acid Generation and Bioremediation with Relevance to Indian Mining", Advanced Materials Research, Vols. 71-73, pp. 645-648, 2009

Online since:

May 2009





[1] K.A. Natarajan: Microbes, Minerals and Environment, Geological Survey of India. Bangalore, (1998).

[2] N. Kuyucak, Microorganisms, biotechnology and acid rock drainage, Minerals and Metallurgical Processing Vol. 17 (2000), p.85.

[3] K.A. Natarajan and S.N. Ambika. Biological aspects of arsenic speciation and remediation, Hydrometallurgy 2008. Proceedings SME, Littleton, Colorado. (Eds) C.A. Young, P.R. Taylor, C.G. Anderson and Y. Choi, (2008) p.108.

[4] K.A. Natarajan: Trans. Nonferrous Met. Soc. China Vol. 18 (2008), p.1352.

2 4 6 8 10 12.

[10] [20] [30] [40] (10-40 mg / L) Zinc/iron (mg. L -1 ) Days Zn Iron.

2 4 6 8.

[10] [20] [30] [40] (10-40 mg / L) Copper/iron (mg. L -1 ) Days Cu Iron.

5 10 15 20.

[1] [2] [3] [4] [5] Arsenic (III) (mg. L -1 ) Days As (III) SRB growing culture As (III) SRB ppt Figure 3. Use of SRB in the bioremoval of (a) Zinc-iron (b) Copper-iron (c) As (III) (a) (b) (c).