Soil cadmium passivator as well as preparation method and application thereof

A passivating agent and soil technology, applied in chemical instruments and methods, applications, climate change adaptation, etc., to achieve the effects of reducing cadmium accumulation, improving safety, and reducing effective cadmium content

Pending Publication Date: 2022-08-05
湖南特沃斯生态科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the technical problem of reducing cadmium-contaminated soil suitable for planting economic crops, the present invention discloses the following technical solutions:

Method used

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  • Soil cadmium passivator as well as preparation method and application thereof
  • Soil cadmium passivator as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A soil cadmium passivator, wherein the components in the soil cadmium passivator, in parts by mass, include: 90 parts of cake organic fertilizer, 65 parts of biochar, 5 parts of sodium alginate and 18 parts of composite microbial inoculants;

[0023] Among them, the preservation number of Bacillus thuringiensis is CCTCC HB 20082349, the preservation number of Pseudomonas is CCTCC HB 20082565, and the preservation number of Bacillus giantis is CCTCC HB20082567.

[0024] Wherein, the number ratio of Bacillus thuringiensis, Pseudomonas and Bacillus giantis is 1:1:1;

[0025] Among them, the total amount of microorganisms in the composite microbial inoculum is 3.0 × 10 8 cfu / ml.

[0026] The preparation method of the soil cadmium passivator of the present embodiment comprises the following steps:

[0027] (1) pulverize biochar and cake organic fertilizer, and stir with composite microbial inoculum after sieving to obtain mixture A;

[0028] (2) dissolving sodium alginate...

Embodiment 2

[0032] A soil cadmium passivator, wherein the components in the soil cadmium passivator, in parts by mass, include: 128 parts of cake organic fertilizer, 93 parts of biochar, 30 parts of sodium alginate and 36 parts of composite microbial inoculants;

[0033] Among them, the preservation number of Bacillus thuringiensis is CCTCC HB 20082349, the preservation number of Pseudomonas is CCTCC HB 20082565, and the preservation number of Bacillus giantis is CCTCC HB 20082567.

[0034] Among them, the number ratio of Bacillus thuringiensis, Pseudomonas and Bacillus giantis is 1:6:5;

[0035] Among them, the total amount of microorganisms in the composite microbial inoculum is 1.0 × 10 9 cfu / ml.

[0036] The preparation method of the soil cadmium passivator of the present embodiment comprises the following steps:

[0037] (1) pulverize biochar and cake organic fertilizer, and stir with composite microbial inoculum after sieving to obtain mixture A;

[0038] (2) dissolving sodium al...

Embodiment 3

[0042] A soil cadmium passivator, the components in the soil cadmium passivator include, in parts by mass: 115 parts of cake-based organic fertilizer, 80 parts of biochar, 25 parts of sodium alginate and 25 parts of composite microbial inoculants;

[0043] Among them, the preservation number of Bacillus thuringiensis is CCTCC HB 20082349, the preservation number of Pseudomonas is CCTCC HB 20082565, and the preservation number of Bacillus giantis is CCTCC HB 20082567.

[0044] Wherein, the number ratio of Bacillus thuringiensis, Pseudomonas and Bacillus giantis is 1:3:3;

[0045] Among them, the total amount of microorganisms in the composite microbial inoculum is 5.0 × 10 8 cfu / ml.

[0046] The preparation method of the soil cadmium passivator of the present embodiment comprises the following steps:

[0047] (1) pulverize biochar and cake organic fertilizer, and stir with composite microbial inoculum after sieving to obtain mixture A;

[0048] (2) dissolving sodium alginate...

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Abstract

The invention relates to the technical field of soil improvement, in particular to a soil cadmium passivator and a preparation method and application thereof. The invention discloses a soil cadmium passivator, which is prepared from 90 to 130 parts of cake organic fertilizer, 65 to 93 parts of charcoal, 5 to 30 parts of sodium alginate and 18 to 36 parts of compound microbial agent, the compound microbial agent is prepared from bacillus thuringiensis, pseudomonas and bacillus megaterium. The soil cadmium passivator disclosed by the invention not only can reduce the effective cadmium content in the soil, but also can reduce cadmium accumulation of crops planted in the improved soil and improve the safety of the crops.

Description

technical field [0001] The invention relates to the technical field of soil improvement, in particular to a soil cadmium passivator and a preparation method and application thereof. Background technique [0002] Chinese patent document CN106967442A discloses a soil cadmium passivator, including biochar, quicklime and sodium alginate, the quicklime in the soil cadmium passivator can increase the pH value of the soil, and convert the ionic effective cadmium into hydroxide Cadmium and other inactive cadmium precipitates, sodium alginate has a good chelating effect on heavy metal cadmium, and biochar has a certain adsorption effect on inactive cadmium such as ionic effective cadmium, cadmium hydroxide and complex cadmium. The biochar, quicklime and sodium alginate in the above-mentioned cadmium passivator can cooperate and synergize with each other under a specific ratio, and play the role of reducing the effective cadmium content in the soil and the cadmium content of the organ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40C09K101/00
CPCC09K17/40C09K2101/00Y02P60/21
Inventor 聂楷峰谭石勇文亚雄邱尧徐学文
Owner 湖南特沃斯生态科技股份有限公司
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