Title:
POROUS BIOLOGICAL CALCIUM CARBONATE-BASED PASSIVATION MATERIAL WITH UREASE ACTIVITY, METHOD FOR PREPARING SAME, AND USE THEREOF
Document Type and Number:
WIPO Patent Application WO/2023/216674
Kind Code:
A1
Abstract:
Provided are a method for preparing a heavy metal passivation material, and a porous biological calcium carbonate-based passivation material with urease activity acquired by means of the method. Based on some specific components, the passivation material exerts the heavy metal adsorption functionality of the porous biological calcium carbonate and maintains the urease activity in an environment with high heavy metal concentrations to continuously exert a biological mineralization effect on the residual heavy metals, thus exhibiting dual passivation effects by means of adsorption and mineralization in heavy metal repair. The present invention significantly improves the resistance to heavy metals, solves the heavy metal concentration limit in conventional MICP technology, and features superior adsorption capacity for heavy metals. The passivation material can be applied to heavy metal repair, and can prevent secondary heavy metal contamination by means of providing a supplementary calcium source after the heavy metal passivation.
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Inventors:
CHENG LIANG (CN)
WANG SHENG (CN)
FANG LONGYANG (CN)
YOU TIANYAN (CN)
YU YANGYANG (CN)
WANG SHENG (CN)
FANG LONGYANG (CN)
YOU TIANYAN (CN)
YU YANGYANG (CN)
Application Number:
PCT/CN2023/077190
Publication Date:
November 16, 2023
Filing Date:
February 20, 2023
Export Citation:
Assignee:
UNIV JIANGSU (CN)
International Classes:
C12N1/20; B01J20/02; C02F3/34; C12N11/14; C02F101/20; C12R1/07
Domestic Patent References:
| WO2021077966A1 | 2021-04-29 | |||
| WO2013120847A1 | 2013-08-22 |
Foreign References:
| CN110156060A | 2019-08-23 | |||
| CN113373139A | 2021-09-10 | |||
| US20200040323A1 | 2020-02-06 |
Other References:
WANG, MAOLIN ET AL.: "Microbial Induced Carbonate Precipitation and Its Application for Immobilization of Heavy Metals: a Review", RESEARCH OF ENVIRONMENTAL SCIENCES, vol. 31, no. 2, 28 February 2018 (2018-02-28), pages 206 - 214, XP009550583, ISSN: 1001-6929
Attorney, Agent or Firm:
NANJING CAI ZHIHUI INTELLECTUAL PROPERTY AGENCY (SPECIAL GENERAL PARTNERSHIP) (CN)
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