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Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Engineering / Faculty of Engineering >
Peer-reviewed Journal Articles, etc >
Solid-phase partitioning of mercury in artisanal gold mine tailings from selected key areas in Mindanao, Philippines, and its implications for mercury detoxification
| Title: | Solid-phase partitioning of mercury in artisanal gold mine tailings from selected key areas in Mindanao, Philippines, and its implications for mercury detoxification |
| Authors: | Opiso, Einstine M. Browse this author | | Aseneiro, John Paul J. Browse this author | | Banda, Marybeth Hope T. Browse this author | | Tabelin, Carlito B. Browse this author →ORCID |
| Keywords: | Gold extraction | | mercury remediation | | small-scale mining | | heavy metal speciation | | mine tailings |
| Issue Date: | Mar-2018 |
| Publisher: | SAGE Publications |
| Journal Title: | Waste management & research |
| Volume: | 36 |
| Issue: | 3 |
| Start Page: | 269 |
| End Page: | 276 |
| Publisher DOI: | 10.1177/0734242X17753534 |
| PMID: | 29378500 |
| Abstract: | The solid-phase partitioning of mercury could provide necessary data in the identification of remediation techniques in contaminated artisanal gold mine tailings. This study was conducted to determine the total mercury content of mine wastes and identify its solid-phase partitioning through selective sequential extraction coupled with cold vapour atomic absorption spectroscopy. Samples from mine tailings and the carbon-in-pulp (CIP) process were obtained from selected key areas in Mindanao, Philippines. The results showed that mercury use is still prevalent among small-scale gold miners in the Philippines. Tailings after ball mill-gravity concentration (W-BM and Li-BM samples) from Mt Diwata and Libona contained high levels of mercury amounting to 25.024 and 6.5 mg kg(-1), respectively. The most prevalent form of mercury in the mine tailings was elemental/amalgamated mercury, followed by water soluble, exchangeable, organic and strongly bound phases, respectively. In contrast, mercury content of carbon-in-pulp residues were significantly lower at only 0.3 and 0.06 mg kg(-1) for P-CIP (Del Pilar) and W-CIP (Mt Diwata), respectively. The bulk of mercury in P-CIP samples was partitioned in residual fraction while in W-CIP samples, water soluble mercury predominated. Overall, this study has several important implications with regards to mercury detoxification of contaminated mine tailings from Mindanao, Philippines. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/70595 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: Tabelin, Carlito Baltazar
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