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This vegetable may solve mercury use problem in artisanal gold mining – report

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Jun 4, 2021 Precious Metals News Comments Off on This vegetable may solve mercury use problem in artisanal gold mining – report


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(Wallace Refiners) – A team of researchers representing the University of British Columbia (Canada), the Federal University of Bahia (Brazil), as well as the Embrapa Cassava and Fruits Center (Brazil), has recently released positive preliminary results of the study of gold leaching with cassava, which is a local plant common in many artisanal mining areas in Latin America, Africa, and Asia.

According to the report, mercury pollution from artisanal gold mining causes severe environmental and health problems, especially to operators and people living around the processing facilities. Over 2000 tonnes/a of mercury is released to the environment by the artisanal miners which is the largest man-made source of mercury pollution, the researchers found.

In their experiments, the researchers used a liquid by-product of cassava flour manufacturing, “manipueira”, to leach gold from the gold ore. It contains hydrogen cyanide, generating from the hydrolysis of cyanogenic glycosides in the cassava plant.

The report indicated that results of the research were very promising with respect to replacing the use of mercury, as approximately 50% of the gold content was extracted from the ore in 24 hours.

The researchers concluded that the cassava juice has the ability to dissolve gold at low cost, which could be beneficial for artisanal gold mining operations.



Disclaimer: The views expressed in this article are those of the author and may not reflect those of Wallace Precious Metals The author has made every effort to ensure accuracy of information provided; however, neither Wallace Precious Metals nor the author can guarantee such accuracy. This article is strictly for informational purposes only. It is not a solicitation to make any exchange in commodities, securities or other financial instruments. Wallace Precious Metals and the author of this article do not accept culpability for losses and/ or damages arising from the use of this publication.



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