Title:
PASSIVATION METHOD FOR HEAVY METAL CONTAMINATED FARMLAND SOIL
Document Type and Number:
WIPO Patent Application WO/2021/031516
Kind Code:
A1
Abstract:
A passivation method for heavy metal contaminated farmland soil, comprising: 1) adding a passivating agent mainly achieving a chemical reaction function into heavy metal contaminated soil, uniformly stirring, and standing for maintenance; 2) adding a passivating agent mainly achieving an adsorption function into the mixture obtained in the step 1), uniformly stirring, and standing for maintenance; and 3) adding water into the mixture obtained in the step 2), adjusting the weight moisture content to 20-40%, and standing for maintenance. The method achieves effective remediation of heavy metal contaminated farmland.
Inventors:
DING ZHENYU (CN)
XU NUCHAO (CN)
SUN NING (CN)
ZHOU XIN (CN)
LIU FENGPING (CN)
HU HONGXIA (CN)
ZHANG ZONGWEN (CN)
ZHANG YANKUN (CN)
YIN HUILIN (CN)
HAO ZHANDONG (CN)
XU NUCHAO (CN)
SUN NING (CN)
ZHOU XIN (CN)
LIU FENGPING (CN)
HU HONGXIA (CN)
ZHANG ZONGWEN (CN)
ZHANG YANKUN (CN)
YIN HUILIN (CN)
HAO ZHANDONG (CN)
Application Number:
PCT/CN2020/070832
Publication Date:
February 25, 2021
Filing Date:
January 08, 2020
Export Citation:
Assignee:
CHINESE ACADEMY OF ENV PLANNING (CN)
International Classes:
B09C1/08
Foreign References:
| CN110479754A | 2019-11-22 | |||
| CN107159703A | 2017-09-15 | |||
| CN103888172A | 2014-06-25 | |||
| CN105295936A | 2016-02-03 | |||
| US8277538B2 | 2012-10-02 | |||
| EP0727402A1 | 1996-08-21 |
Attorney, Agent or Firm:
BEIJING HEREGO PATENT AGENT FIRM (CN)
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