An inorganic-organic composite regulator suitable for heavy metal cadmium pollution in alkaline soil

A technology of regulating agent and cadmium pollution is applied in the field of farmland soil remediation to achieve the effects of ensuring safe production, alleviating ecological pressure and simple composting process.

Active Publication Date: 2022-05-17
AGRO ENVIRONMENTAL PROTECTION INST OF MIN OF AGRI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of the inorganic-organic composite regulating agent of the present invention can effectively solve the problem of moderate cadmium pollution restoration in alkaline soil, and has the advantages of simple use, good regulation effect, no secondary pollution, green environmental protection, and safe production of agricultural products.

Method used

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  • An inorganic-organic composite regulator suitable for heavy metal cadmium pollution in alkaline soil
  • An inorganic-organic composite regulator suitable for heavy metal cadmium pollution in alkaline soil
  • An inorganic-organic composite regulator suitable for heavy metal cadmium pollution in alkaline soil

Examples

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Effect test

Embodiment 1

[0040]An inorganic-organic compound regulator for the control of cadmium pollution in alkaline soil, the components and mass percentages are: 35% of iron-zinc biochar; 40% of peat; 25% of fermented mushroom dregs. Proportionally mixed, fully stirred evenly to prepare the required inorganic-organic composite regulator.

[0041] The preparation method of described iron-zinc biochar is:

[0042] (1) Under anaerobic or anaerobic conditions, put the crushed straw in a muffle furnace, under the protection of nitrogen, the heating rate is controlled at 10°C / min, the carbonization temperature is 500°C, and the carbonization time is 2h. straw biochar;

[0043] (2) Add the prepared straw biochar to Fe(NO 3 ) 3 9H 2 O and ZnSO 4 ·7H 2 In the mixed solution of O, the Fe(NO 3 ) 3 9H 2 O and ZnSO 4 ·7H 2 The mass ratio of Fe, Zn and straw biochar in the O mixed solution is 0.1:0.05:1; the pH value of the mixed solution is 7.0; the ratio of the straw biochar to the mixed solution ...

Embodiment 2

[0048] The difference from Example 1 is that the components and mass percentages of the composite regulating agent are: 40% of iron-zinc biochar; 35% of peat; 25% of fermented mushroom dregs.

Embodiment 3

[0050] The difference from Example 1 is that the components and mass percentages of the composite regulating agent are: 32% of iron-zinc biochar; 38% of peat; 20% of fermented mushroom dregs.

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Abstract

The invention discloses an inorganic-organic composite regulating agent suitable for heavy metal cadmium pollution in alkaline soils. Fermented mushroom dregs, iron-zinc biomass charcoal and peat are 20-30:30-40:30 in mass ratio. 40 ratio for mixing, fully stirred evenly to prepare the required inorganic-organic composite regulator. The inorganic-organic composite regulator can meet the needs of moderate cadmium pollution restoration in alkaline soil, effectively solve the technical problem that the existing general inorganic regulators or organic regulators have no obvious effect on the regulation of moderate cadmium pollution in alkaline soil, and can simultaneously Use the organic matter and inorganic nutrients in the regulator to improve soil fertility and promote the healthy growth and quality of crops.

Description

technical field [0001] The invention belongs to the technical field of farmland soil restoration, and relates to an inorganic-organic composite regulator suitable for heavy metal cadmium pollution in alkaline soil and a preparation method thereof. Background technique [0002] Soil heavy metal cadmium pollution is long-term, concealed, and irreversible. Once polluted, it is difficult to remove from the soil. Therefore, strengthening the research and development of soil heavy metal cadmium pollution regulators, controlling the absorption and accumulation of heavy metal cadmium in suitable parts of crops, and ensuring the safety of crop production and human health not only have important practical application value, but also have important social, environmental and economic benefits. [0003] Because the soil of wheat fields in the northern region is alkaline soil, it cannot be cultivated in dry land, and the cadmium pollution in the acidic rice fields in the south can be adju...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/40C09K101/00
CPCC09K17/40C09K2101/00Y02W30/40
Inventor 徐应明杨婷婷黄青青梁学峰孙约兵
Owner AGRO ENVIRONMENTAL PROTECTION INST OF MIN OF AGRI
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