Invention Grant
- Patent Title: Method of cleaning heavy metals-containing soil
- Patent Title (中): 清洁含重金属的土壤的方法
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Application No.: US11662343Application Date: 2005-09-09
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Publication No.: US07829754B2Publication Date: 2010-11-09
- Inventor: Hideo Tamura , Takeshi Sato , Munechika Honda
- Applicant: Hideo Tamura , Takeshi Sato , Munechika Honda
- Applicant Address: JP Nagoya-shi
- Assignee: Chubu Electric Power Co., Inc.
- Current Assignee: Chubu Electric Power Co., Inc.
- Current Assignee Address: JP Nagoya-shi
- Agency: Edwards Angell Palmer & Dodge LLP
- Priority: JP2004-264601 20040910
- International Application: PCT/JP2005/016599 WO 20050909
- International Announcement: WO2006/028201 WO 20060316
- Main IPC: A62D3/30
- IPC: A62D3/30 ; A62D3/33 ; A62D3/00 ; A62D3/02 ; C02F3/32 ; C02F3/34 ; B09B3/00 ; B09C1/10 ; C12P1/00 ; C12S3/00

Abstract:
A soil cleaning method (phytoremediation) of absorbing a contaminating substance contained in a contaminated soil by a plant to clean the soil. An object of the present invention is to provide a method of cleaning a contaminated soil which performs cleaning of a soil containing heavy metals in a shorter term than before and, at the same time, utilizes phytoremediation having little influence on the environment. The object is attained by absorbing heavy metals by a plant of Polygonaceae family, Fagopyrum genus, and, at the same time, adding a biodegradable chelating agent to a contaminated soil in order to assist the absorption. And, a biodegradable chelating agent having the high heavy metal dissolving out ability not only enhances the cleaning efficacy but also reduces secondary influence on the environment.
Public/Granted literature
- US20080071130A1 Method Of Cleaning Heavy Metals-Containing Soil Public/Granted day:2008-03-20
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