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Chemical-biological passivator and preparation method thereof

A passivating agent, biological technology, applied in the direction of biochemical equipment and methods, chemical instruments and methods, methods based on microorganisms, etc., can solve the problem of less chemical-biological passivating agents, and achieve the goal of reducing arsenic absorption and promoting growth Effect

Active Publication Date: 2017-11-28
INST OF ENVIRONMENT & SUSTAINABLE DEV IN AGRI CHINESE ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But on the whole, there are relatively few chemical-biological passivators with related functions reported so far.

Method used

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  • Chemical-biological passivator and preparation method thereof
  • Chemical-biological passivator and preparation method thereof
  • Chemical-biological passivator and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Embodiment 1: the preparation of chemical-biological passivation agent

[0056] The implementation steps of this embodiment are as follows:

[0057] According to the weight ratio of ferrihydrite and carbon slag powder 2.6:1.0, mix ferrihydrite and carbon slag powder evenly, and add the obtained mixture to the bacteria content of 4.6×10 7 In the bacterial suspension of Trichoderma aculeatus of cfu / ml (see page 4 of the instruction manual, the same below), let stand at room temperature for 2.5 hours, use a suction filter bottle with a vacuum pump and a cellulose acetate membrane filter with a pore size of 0.45 μm, The obtained filter cake was dried at a temperature of 38° C. for 0.8 hours, and the dried filter cake was ground to a particle size of 100 mesh using a mortar and a grinding rod to obtain a mixture containing 1.8×10 7 CFU / gram Chemo-biological inactivator of chlamydospores of Trichoderma aculeatus.

Embodiment 2

[0058] Embodiment 2: the preparation of chemical-biological passivation agent

[0059] The implementation steps of this embodiment are as follows:

[0060] According to the weight ratio of ferrihydrite and carbon slag powder 3.4:1.0, mix ferrihydrite and carbon slag powder evenly, and add the obtained mixture to 7.8×10 6 cfu / ml Trichoderma aculeatus bacterial suspension, let it stand at room temperature for 3 hours, use a suction filter bottle with a vacuum pump and a cellulose acetate membrane with a pore size of 0.45 μm to filter, and the obtained filter cake is baked at a temperature of 35°C Dry for 1.0 hour, and use a mortar and a grinding rod to grind the dried filter cake to a particle size of 120 mesh to obtain a mixture containing 2.6×10 7 CFU / gram Chemo-biological inactivator of chlamydospores of Trichoderma aculeatus.

Embodiment 3

[0061] Embodiment 3: the preparation of chemical-biological passivation agent

[0062] The implementation steps of this embodiment are as follows:

[0063] According to the weight ratio of ferrihydrite and carbon slag powder 2.0: 1.0, mix ferrihydrite and carbon slag powder evenly, and add the obtained mixture to a bacteria content of 1.0×10 7 cfu / ml Trichoderma aculeatus bacterial suspension, let it stand at room temperature for 2 hours, use a suction filter bottle with a vacuum pump and a cellulose acetate membrane with a pore size of 0.45 μm to filter, and the obtained filter cake is baked at a temperature of 42°C Dry for 0.5 hours, use a mortar and a grinding rod to grind the dried filter cake to a particle size of 150 mesh, and obtain a mixture containing 0.5×10 7 CFU / gram Chemo-biological inactivator of chlamydospores of Trichoderma aculeatus.

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Abstract

The invention relates to a chemical-biological passivator and a preparation method thereof. The preparation method comprises the following steps: uniformly mixing ferrihydrite with carbon residue powder to obtain a mixture; adding the mixture into a bacterial suspension of acanthosporum, the bacterial content of which is 1.0-9.9*10<7>cfu / ml. The chemical-biological passivator provided by the invention is obviously enhanced in promoting growth of water spinach, can reduce arsenic absorption by water spinach and reduce effectiveness of soil arsenic, and can be used as an efficient chemical-biological passivator for regulating arsenic pollution farmland risk in the future.

Description

【Technical field】 [0001] The invention belongs to the technical field of agricultural production. More specifically, the present invention relates to a chemical-biological passivation agent, and also relates to a preparation method of the chemical-biological passivation agent. 【Background technique】 [0002] Arsenic is considered to be a toxic metalloid element, and excessive intake of arsenic can cause serious harm to human health. Arsenic in farmland accumulates in the human body through the food chain, thus seriously endangering human health. At present, the overall situation of arsenic pollution in farmland in my country is not optimistic, and the frequent occurrence of arsenic pollution incidents has aroused global attention. The control of arsenic pollution has always been one of the difficulties in agricultural environmental regulation. There are many technical methods for controlling arsenic pollution in soil, such as chemical passivation method, guest soil method,...

Claims

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Application Information

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IPC IPC(8): C09K17/40C12N1/14C12R1/885C09K101/00
Inventor 苏世鸣曾希柏张宏祥白玲玉王亚男
Owner INST OF ENVIRONMENT & SUSTAINABLE DEV IN AGRI CHINESE ACADEMY OF AGRI SCI
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