JP4240026B2 - 汚染土壌及び/又は地下水の浄化方法 - Google Patents
汚染土壌及び/又は地下水の浄化方法 Download PDFInfo
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- JP4240026B2 JP4240026B2 JP2005258983A JP2005258983A JP4240026B2 JP 4240026 B2 JP4240026 B2 JP 4240026B2 JP 2005258983 A JP2005258983 A JP 2005258983A JP 2005258983 A JP2005258983 A JP 2005258983A JP 4240026 B2 JP4240026 B2 JP 4240026B2
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Fire-Extinguishing Compositions (AREA)
- Processing Of Solid Wastes (AREA)
Description
1)汚染物質:トリクロロエチレン
2)汚染位置:図2(a)に示す天井高2.3mの工場直下の帯水層中
3)汚染範囲:
TCE汚染全体 地下10〜20m、V≒50,000m3
(≒W50m×L100m×H10m)
TCE濃度10〜2,000mg/Lの汚染源領域
地下15〜20m、V≒1,000m3
(≒W10m×L20m×H5m)
TCE濃度0〜10mg/L未満の汚染拡散領域
地下10〜20m、V≒49,000m3
図2(b)に実施例1の浄化処理の概要を示す。
その結果、5年間で汚染領域全体のTCE濃度を環境基準(0.03mg/L以下)まで浄化することができた。
実施例1において、汚染源領域の原位置置換工法に用いる非汚染土壌として、鉄粉を含まない砂スラリーを用いたこと以外は同様にして浄化処理を行ったところ、15年で汚染領域全体のTCE濃度を環境基準(0.03mg/L以下)まで浄化することができた。
全汚染領域を嫌気性バイオレメディエーションのみで浄化する場合(比較例1)、汚染源領域のみを実施例1と同様にして原位置置換工法で浄化処理し、汚染拡散領域については放置による拡散での浄化を行う場合(比較例2)について、環境基準を満足するに要する期間を事後3年間のモニタリング結果から移流分散解析シミュレーションにより予測し、その結果を実施例1及び比較例3の結果と共に、表1に示した。
5 浄化剤入り非汚染土壌
5A 浄化剤
6 非切削部
11 帯水層
12 難透水層
13 分離相
14 吸着相
15 溶解相
16 工場棟
18 鉄粉混合砂
19 注入井戸
Claims (2)
- 揮発性有機塩素化合物で汚染された土壌及び/又は地下水を浄化する方法において、
汚染源領域と、該汚染源領域の外周の汚染拡散領域とで異なる浄化処理を行う汚染土壌及び/又は地下水の浄化方法であって、
前記汚染源領域は、土壌及び/又は地下水中の揮発性有機塩素化合物濃度が、5〜50mg/Lの間で予め設定された設定値以上の領域であり、前記汚染拡散領域は、土壌及び/又は地下水中の揮発性有機塩素化合物濃度が該設定値未満の領域であり、
前記汚染源領域は、粘性土層を含む汚染土壌と非汚染土壌とを置換する原位置置換工法により浄化処理し、
該非汚染土壌は、鉄粉と増粘剤を含む固形分濃度50重量%以上の鉄粉混合砂スラリーであり、
前記汚染拡散領域は、微生物処理法により浄化処理し、
該微生物処理として嫌気性バイオレメディエーションを実施し、
前記汚染源領域の浄化処理を汚染拡散領域の浄化処理に先行して行うことを特徴とする汚染土壌及び/又は地下水の浄化方法。 - 請求項1において、前記汚染拡散領域にバリア機能、浄化剤注入機能及びモニタリング機能のうちのいずれか1以上の機能を有する井戸を設けて該汚染拡散領域を浄化処理することを特徴とする汚染土壌及び/又は地下水の浄化方法。
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Cited By (1)
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CN110054278A (zh) * | 2019-05-09 | 2019-07-26 | 武汉大学 | 一种促进纳米四氧化三铁分散和迁移的方法 |
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JP5218853B2 (ja) * | 2009-05-15 | 2013-06-26 | 清水建設株式会社 | 汚染土壌浄化後における再汚染防止方法 |
BE1019442A4 (nl) * | 2010-08-05 | 2012-07-03 | Nooten Thomas Van | Geexpandeerde kleikorrels voor de verwijdering van gehalogeneerde verbindingen uit water. |
JP6274721B2 (ja) * | 2012-12-12 | 2018-02-07 | 株式会社大林組 | 有機塩素化合物で汚染された汚染土壌又は汚染地下水の浄化材、及び、浄化方法 |
JP6750865B2 (ja) * | 2016-03-11 | 2020-09-02 | 有限会社エコルネサンス・エンテック | 土壌汚染物質の対策方法 |
CN110892035A (zh) * | 2017-06-29 | 2020-03-17 | 宇部兴产株式会社 | 不溶化材料及其制造方法 |
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CN110054278A (zh) * | 2019-05-09 | 2019-07-26 | 武汉大学 | 一种促进纳米四氧化三铁分散和迁移的方法 |
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