Title:
PASSIVATOR AND APPLICATION THEREOF IN CONTAMINATED SOIL REMEDIATION
Document Type and Number:
WIPO Patent Application WO/2023/123091
Kind Code:
A1
Abstract:
A heavy metal passivator and an application thereof in contaminated soil remediation. The heavy metal passivator comprises a microbial agent, a fixing solution, and a urea solution; the microbial agent comprises a carbonate mineralizing bacterial liquid and a carbonic anhydrase producing bacterial liquid; the ratio of the volume of the carbonate mineralizing bacterial liquid to the volume of the carbonic anhydrase producing bacterial liquid is (1-5):1; the fixing solution is a calcium chloride solution. The heavy metal passivator is applied to remediation of heavy metal-contaminated soil, and the steps of remediation comprise: evenly mixing the microbial agent and contaminated soil, then sequentially adding the fixing solution and the urea solution, and then fermenting for seven to eight days. The heavy metal removal rate can reach more than 90% in only seven to eight days, so that the time of the remediation of the heavy metal-contaminated soil is shortened.
Inventors:
LIU YARU (CN)
LI SHUPENG (CN)
GUO LILI (CN)
WANG QI (CN)
XIONG JING (CN)
HAO DI (CN)
XIN CHENG (CN)
LI JIACHEN (CN)
LI SHUPENG (CN)
GUO LILI (CN)
WANG QI (CN)
XIONG JING (CN)
HAO DI (CN)
XIN CHENG (CN)
LI JIACHEN (CN)
Application Number:
PCT/CN2021/142615
Publication Date:
July 06, 2023
Filing Date:
December 29, 2021
Export Citation:
Assignee:
BCEG ENV REMEDIATION CO LTD (CN)
International Classes:
C12N1/20; B09C1/08; B09C1/10; C09K17/40; C09K101/00; C09K109/00; C12R1/01; C12R1/07
Foreign References:
| CN108220380A | 2018-06-29 | |||
| CN103951532A | 2014-07-30 | |||
| CN112322519A | 2021-02-05 |
Other References:
CHAPARRO-ACUÑA SANDRA PATRICIA, BECERRA-JIMÉNEZ MÓNICA LILIANA, MARTÍNEZ-ZAMBRANO JOSÉ JOBANNY, ROJAS-SARMIENTO HUGO ALFONSO: "Soil bacteria that precipitate calcium carbonate: mechanism and applications of the process", ACTA AGRONÓMICA, vol. 67, no. 2, pages 277 - 288, XP093074337, ISSN: 0120-2812, DOI: 10.15446/acag.v67n2.66109
Attorney, Agent or Firm:
SUNSHINE INTELLECTUAL PROPERTY INTERNATIONAL CO., LTD (CN)
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