| 作成者 |
|
|
|
| 本文言語 |
|
| 出版者 |
|
|
|
| 発行日 |
|
| 収録物名 |
|
| 巻 |
|
| 号 |
|
| 開始ページ |
|
| 終了ページ |
|
| 出版タイプ |
|
| アクセス権 |
|
| 権利関係 |
|
| 関連DOI |
|
| 関連DOI |
|
|
|
|
|
|
|
| 関連URI |
|
|
|
|
|
|
|
| 関連情報 |
|
|
|
|
|
|
|
|
|
| 概要 |
埋立焼却灰の風化に伴う鉄含有物質の変質および二次生成物の形態を明らかにするため，埋立年が異なる4つの地点 (1～20年経過) から埋立焼却灰を採取した。埋立焼却灰の風化現象を光学顕微鏡，走査型電子顕微鏡(SEM-EDX)，X線回折装置(XRD)，蛍光X線装置(XRF) を用いて明らかにした。埋立焼却灰には，二次生成物が確認され，goethite(α-FeOOH)， lepidocrocite(γ-...FeOOH)，hematite(Fe2O3)，magnetite(Fe3O4)，iron oxide(FeO)，ゲル状の鉄含有Ca-SiとCa-Al-Siが同定された。これらの二次生成物は，埋立地中の多様な環境下において焼却灰中の鉄含 有物質が変質したものである。二次生成物には，環境保全上，重要なPb, Zn, Cu, Ni等の重金属が共存しており，埋立地系外への重金属の流出抑制に寄与していると考えられた。
The impact of natural weathering on the behavior of Fe-rich phases, their transformation. and the formation of the relevant secondary products in the weathered bottom ash samples of a municipal solid waste incineration (mono) landfill site in the northeast USA were systematically investigated. Samples of various ages (1-20 yrs) were collected from four locations of the landfill in 2009. Optical microscopy, SEM-EDX, XRD and XRF examinations were applied in order to document the footprints of weathering processes. Use of these techniques revealed that several secondary products (amorphous or crystalline) have been developed, including goethite (α-FeOOH), lepidocrocite (γ-FeOOH), hematite (Fe203), magnetite (Fe_3O_4) , iron oxide (FeO). and Fe-rich Ca-Si and Ca-Al-Si gel phases. They occurred under variable environmental conditions as the weathering products of primary iron-bearing phases that usually exist in incineration ash. The strong affinity of these secondary phases with heavy metals of environmental significance such as Zn, Cu, Pb, and Ni was also identified. This suggests that the development of secondary Fe-rich products can partially contribute to the reduction of heavy metals released into the surrounding environments.続きを見る
|
Mendeley出力
