Differential bioleaching of copper by mesophilic and moderately thermophilic acidophilic consortium enriched from same copper mine water sample

Bioresource Technology
N P MarhualB K Mishra

Abstract

Three acidophilic enrichment consortium were developed from mine water sample of copper mine site at Khetri, India were compared for their copper leaching efficiency. Out of these one was mesophilic (35 degrees C) and two were moderately thermophilic (50 degrees C). Consortia were named as mesophilic acidophilic chemolithotrophic consortia (MACC), thermophilic acidophilic chemolithotrophic consortia (TACC), and Sulfobacillus acidophilic consortia (SAC). Copper extraction ability of both the thermophilic consortia (77-78% extraction) was almost double to that of mesophilic consortia (40% extraction) at 10% pulp density after 55 days. Both the thermophilic consortia were equally effective in leaching of other metals like Ni, Co, Zn, Mn. After 55 days, the percentage of extractions of copper by TACC was 76, 74, 67, 48 and 45 at 5%, 10%, 15%, 20% and 30% pulp density, respectively. Total number of bacteria was maximum at 5% pulp density which decreases with increase in pulp density. Sulfobacillus-like bacteria were seen in the Sulfobacillus enrichment cultures. Moderately thermophilic consortia proved to be better in leaching performance than the mesophilic counterpart.

References

Sep 23, 2003·Research in Microbiology·D Barrie Johnson, Kevin B Hallberg
Sep 13, 2005·Bioresource Technology·P H-M KinnunenJ A Puhakka

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Citations

Oct 7, 2014·Journal of Hazardous Materials·Pejman HadiGordon McKay
Nov 19, 2013·Applied and Environmental Microbiology·Yuguang WangHongbo Zhou
Sep 30, 2016·Environmental Science and Pollution Research International·Abhishek Kumar AwasthiJinhui Li
Jun 14, 2015·Waste Management & Research : the Journal of the International Solid Wastes and Public Cleansing Association, ISWA·Zheng WangFu Gu
Mar 30, 2017·Topics in Current Chemistry·Chao NingGordon McKay

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