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Remediation of As contamination in the mining area Lessons from the Korean experienc
http://hdl.handle.net/10458/6265
http://hdl.handle.net/10458/6265c5d3d3cf-6b17-429f-a955-f7fc2806deb3
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
本文 (209.2 kB)
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| Item type | その他 / Others(1) | |||||
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| 公開日 | 2020-06-21 | |||||
| タイトル | ||||||
| タイトル | Remediation of As contamination in the mining area Lessons from the Korean experienc | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_1843 | |||||
| 資源タイプ | other | |||||
| 著者 |
Kyoung-Woong, Kim
× Kyoung-Woong, Kim× Myoung-Soo, Ko× Hyeop-Jo, Han× So-Young, Na |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Several hundreds of abandoned metal mines in Korea are the major anthropogenic sources of As contamination to the nearby environment and similar issues have been raised in all around the world including Canada, China, Indonesia, Japan, Spain and the United Kingdom. The Chungyang area in Korea is adjacent to the abandoned Au-Ag mine, the Gubong mine, which was closed in the 1970s. Large amounts of mine wastes have been remained without proper restoration and transported into the vicinity area.This relocation of mine waste took place mainly during the summer season due to heavy rains and became the serious problem because of the sequential contamination of groundwater and crop plants. Stabilization using proper additives is an effective soil remediation technique to reduce As mobility in soil. Numerous studies have reported that Fe-containing materials, which are amorphous Fe-oxides,goethite and hematite, were effective in As immobilization and acid mine drainage sludge （AMDS） may be potential material for As immobilization. The AMDS is the by-product, from electrochemical treatment of acid mine drainage and mainly contains Fe-oxide. Batch experiments, continuous flow column experiments and field applications were carried out to assess As immobilization efficiency and feasibility. In addition, grown rice grain was analyzed by XANES to confirm the As immobilization from the determination of chemical speciation. For the assessment of stabilization, we used to determine the As concentration in crop plants grown on the field site but it is not easily applicable because of time and cost. Therefore, we may need simple monitoring technique to measure the mobility or leachability which can be comparable with As concentration in crop plants. We selected several As extractability test using single extractions to predict the As mobility for the field soils. Amount of leached As concentration by single extraction was different among each extraction protocol wIth the characteristics of soil and extractant. Single extractions were statistically interpreted and these extractions leached by similar mechanism showed the high similarity by cluster analysis. As result, one representative single extraction can be suggested as the best monitoring tool for the investigation As leachability and mobility in the soil stabilization process. |
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| 言語 | en | |||||
| 書誌情報 |
en : 4th InternationalArsenic Symposium in MIYAZAKI 2015 p. 36-38, 発行日 2015-10 |
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| 出版者 | ||||||
| 出版者 | University of Miyazaki, IRISH | |||||
| 言語 | en | |||||
| 著者版フラグ | ||||||
| 出版タイプ | VoR | |||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
