Mobility of Metals from Mine Tailings using Different Types of Organic Acids: Batch Leaching Experiment
International Journal of Science and Research (IJSR)

International Journal of Science and Research (IJSR)
www.ijsr.net | Open Access | Fully Refereed | Peer Reviewed International Journal

ISSN: 2319-7064


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Research Paper | Chemical Engineering | South Africa | Volume 5 Issue 11, November 2016

Mobility of Metals from Mine Tailings using Different Types of Organic Acids: Batch Leaching Experiment

Ashley H. Munyai, Elvis Fosso-Kankeu, Frans Waanders

The presence of toxic metals in mine tailings is a major concern because they are hazardous to ecological system and human health. Hence the mobility of heavy metals is an important factor to look at when assessing risk of pollution or contamination in tailing dump. This study was carried out in order to determine the effect of organic acids on the mobility of metals from mine tailings. Characterization of mine tailings was carried out using XRD and XRF. Batch leaching experiment under different initial pH, contact time, temperature, and concentration was carried out in this study. The results show that Fe and Al were the major elements, whereas quartz minerals were considered as the major constituents in the tailing. The batch leaching studies indicated high mobility of elements at low pH, short exposure time, high concentration of organic acids and high temperature. Increase of temperature resulted to faster release of metals, with maximum concentrations of Fe and Al recorded at 48 hours. Oxalic acid and citric acid were found as best leaching agents. The kinetic studies allowed to predict that the dissolution of metals from tailing samples was mostly diffusion controlled.

Keywords: Mine tailings, batch leaching, organic acids, mobility of metals, pH, temperature, concentration

Edition: Volume 5 Issue 11, November 2016

Pages: 520 - 527

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Ashley H. Munyai, Elvis Fosso-Kankeu, Frans Waanders, "Mobility of Metals from Mine Tailings using Different Types of Organic Acids: Batch Leaching Experiment", International Journal of Science and Research (IJSR), https://www.ijsr.net/search_index_results_paperid.php?id=ART20162804, Volume 5 Issue 11, November 2016, 520 - 527

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