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Removal of Arsenic, Boron, and Selenium from Excavated Rocks by Consecutive Washing
| Title: | Removal of Arsenic, Boron, and Selenium from Excavated Rocks by Consecutive Washing |
| Authors: | Tabelin, Carlito Baltazar Browse this author →ORCID | | Basri, Amir Hamzah Mohd Browse this author | | Igarashi, Toshifumi Browse this author →KAKEN DB | | Yoneda, Tetsuro Browse this author →KAKEN DB |
| Keywords: | Arsenic | | Boron | | Selenium | | Excavated rocks | | Washing |
| Issue Date: | Sep-2012 |
| Publisher: | Springer Netherlands |
| Journal Title: | Water, Air, & Soil Pollution |
| Volume: | 223 |
| Issue: | 7 |
| Start Page: | 4153 |
| End Page: | 4167 |
| Publisher DOI: | 10.1007/s11270-012-1181-x |
| Abstract: | This paper describes the leaching behavior and release mechanisms of arsenic (As), boron (B) and selenium (Se) from excavated rocks using sequential extraction for solid-phase fractionation, batch experiments with pH variation, and consecutive batch experiments with changes in the solid-liquid mixing ratios. Arsenic in the excavated rock was mostly found with the sulfides/organic matter fraction while majority of the leachable B and Se were associated with the exchangeable phases. The leaching of As was strongly pH dependent, Se was pH dependent only around the acidic region, and B was pH independent. Consecutive washing technique with deionized water effectively lowered the B and Se concentrations in the leachate below the drinking water standards of Japan, but was inefficient in the removal of As. Arsenic exhibited non-conservative leaching behavior and its movement was affected by processes like dissolution, precipitation and pyrite oxidation. In contrast, B and Se behaved more conservatively, resulting in their easy removal from the excavated rock by simple washing and dilution. |
| Rights: | The final publication is available at www.springerlink.com |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/50286 |
| 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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