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A Review of Microbial Induced Carbonate Precipitation Treatment in the Remediation of Diverse Mine Tailings

Tailings and Mine Waste Conference (2023 : Vancouver, B.C.); University of British Columbia. Norman B. Keevil Institute of Mining Engineering

Microbial induced calcite precipitation (MICP) offers a promising solution for a multitude of potential areas of concern with the remediation of mine tailings. The microorganisms involved in MICP can bind the contaminants in tailings as an effective source control treatment, preventing them from leaching into the environment. The formation of calcium carbonate minerals within tailings can also help build stability and strength, thus reducing the risk of landslides or erosional dispersion. Research has shown that MICP can be effective on diverse sources and conditions of tailings – not only metal resources, but also coal and oil sands tailings. MICP has demonstrated the ability to reduce permeability, improve dewatering, and increase the strength of oil sands mine tailings. The microorganisms involved in MICP can also effectively immobilize and isolate contaminants within the tailings’ containment facilities, preventing spread to other areas of the site. The formation of calcium carbonate minerals can also help to neutralize acidic conditions, which is often a problem with mine tailings’ locations. The use of MICP for remediation has several advantages over traditional remediation methods. It is a natural process that does not require the use of harsh chemicals or heavy machinery. MICP can be applied in situ, which is particularly beneficial as tailings are often located in remote or inaccessible areas. MICP can also be a costeffective remediation method, as materials required are often readily available and relatively inexpensive. MICP offers a promising solution for remediation of mine tailings, but requires further research for large-scale application. There are challenges associated with the process, and ongoing research and development are likely required to improve its effectiveness and applicability for a diverse range of conditions encountered at mine tailings sites. The focus of this paper is to highlight MICP as a valid established treatment option for a multitude of issues associated with mine tailings.

Text

2023-12-08

Attribution-NonCommercialNoDerivatives 4.0 International

http://hdl.handle.net/2429/86804

Unreviewed

http://creativecommons.org/licenses/by-nc-nd/4.0/