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Cadmium activating agent for improving remediation efficiency of cadmium-contaminated soil in solar greenhouse and application thereof

A technology of polluted soil and restoration efficiency, applied in the field of soil restoration, can solve the problems of low restoration efficiency, achieve the effect of simplifying the restoration process, increasing the absolute amount, and highlighting the restoration efficiency

Inactive Publication Date: 2020-07-17
VEGETABLE RES INST OF SHANDONG ACADEMY OF AGRI SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Phytoremediation is an effective way to reduce the content of cadmium in soil. It has attracted much attention because of its greenness, safety, and pollution-free. However, the remediation efficiency of this method is low, and it takes decades or even hundreds of years to remediate heavily polluted soil.
This is because the predecessors mainly focused on the screening of pure cadmium hyperaccumulator plants, and did not pay enough attention to the improvement of cadmium activity in solar greenhouse soils, resulting in low remediation efficiency, and the existence of an excessively high ratio of inactive cadmium has become a constraint for phytoremediation of cadmium-contaminated soil. important limiting factor

Method used

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  • Cadmium activating agent for improving remediation efficiency of cadmium-contaminated soil in solar greenhouse and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The cadmium activator includes 3 parts by weight, 3 parts of glucose, 12 parts of ammonium bicarbonate, 15 parts of urea, 300 parts of sulfur powder, 60 parts of humic acid, 0.3 part of Bacillus megaterium, and 0.3 part of Bacillus subtilis.

[0027] Cadmium activator preparation method:

[0028] (1) According to the above-mentioned parts by weight, glucose, ammonium bicarbonate, urea, sulfur powder, and humic acid were respectively taken, then fully pulverized, passed through a 60-80 mesh sieve, and sieved and mixed uniformly to obtain a mixture;

[0029] (2) adding Bacillus megaterium microbial inoculum and Bacillus subtilis microbial inoculum to the mixture of step (1) and fully mixing;

[0030] The Bacillus megaterium microbial inoculum used in all the examples was purchased from the China Agricultural Microorganism Culture Collection Management Center (No. control center.

[0031] (3) adjusting the mixture of step (2) to water content with distilled water is 8%; ...

Embodiment 2

[0035] The cadmium activator includes 1.5 parts of glucose, 10 parts of ammonium bicarbonate, 10 parts of urea, 200 parts of sulfur powder, 50 parts of humic acid, 0.3 part of Bacillus megaterium, and 0.2 part of Bacillus subtilis in parts by weight.

[0036] (1) According to the above-mentioned parts by weight, glucose, ammonium bicarbonate, urea, sulfur powder, and humic acid were respectively taken, then fully pulverized, passed through a 60-80 mesh sieve, and sieved and mixed uniformly to obtain a mixture;

[0037] (2) adding Bacillus megaterium microbial inoculum and Bacillus subtilis microbial inoculum to the mixture of step (1) and fully mixing;

[0038] (3) adjusting the mixture of step (2) to water content with distilled water is 8%;

[0039] (4) Carry out granulation by extruding granulator, particle diameter is 2mm;

[0040] (5) The product obtained in step (4) is quickly dried in an environment of 40-45° C., and the dried product obtained is passed through a 3 mm ...

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Abstract

The invention belongs to the field of soil remediation, and particularly relates to a cadmium activating agent for improving remediation efficiency of cadmium-contaminated soil in a solar greenhouse and application of the cadmium activating agent. The cadmium activating agent is prepared from the following components in parts by weight: 2 to 5 parts of glucose, 10 to 20 parts of ammonium bicarbonate, 10 to 20 parts of urea, 100 to 300 parts of sulfur powder, 50 to 100 parts of humic acid, 0.2 to 0.5 part of bacillus megaterium and 0.1 to 0.5 part of bacillus subtilis. The raw materials of thecadmium activating agent have no environmental risk, glucose, humic acid and the like in the components can provide precious carbon sources for soil microorganisms; ammonium bicarbonate, urea, sulfurpowder and the like are fertilizer sources for crop growth, and bacillus megatherium and the like can improve the effectiveness of soil phosphorus.

Description

technical field [0001] The invention belongs to the field of soil remediation, in particular to a cadmium activator for improving the remediation efficiency of cadmium-contaminated soil in a solar greenhouse and an application thereof. Background technique [0002] The 2014 "National Soil Pollution Survey Bulletin" pointed out that the overall soil quality in my country is not optimistic. Within the scope of the surveyed areas, up to 16.1% of the samples exceeded the environmental quality standards, among which cadmium exceeded the standard rate of 7%, ranking first higher than other heavy metals. Cadmium is one of the five most dangerous substances in environmental pollution. As a persistent toxic pollutant, it cannot be decomposed after entering the soil environment. After entering the human body through various channels, it accumulates in the human body. mutagenic effect. The vegetable production environment in the solar greenhouse is special, with the characteristics o...

Claims

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Application Information

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IPC IPC(8): C09K17/40B09C1/10B09C1/08C05G3/80C09K109/00
CPCB09C1/08B09C1/10C05C3/00C09K17/40C09K2109/00
Inventor 孙凯宁张浩然杨宁温丹王晓岳耀权王克安
Owner VEGETABLE RES INST OF SHANDONG ACADEMY OF AGRI SCI
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