Soil conditioner capable of reducing activity of heavy metal in soil and preparation method thereof

A technology of soil conditioner and heavy metal chelating agent, which is applied in the field of soil conditioner and its preparation to reduce the activity of heavy metals in soil, can solve the problems of high transportation cost and application cost, unsatisfactory repair effect, and difficulty in large-scale promotion. The effect of reducing the activity of heavy metals, reducing the content of heavy metals, and strengthening the repairing effect

Inactive Publication Date: 2018-08-17
张鑫
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the above soil conditioners are applied to heavy metal-contaminated soil, the remediation effect is not ideal, and the heavy metal content in crops is still high, and a large amount of application is required at one time, generally 2250-4500kg / hm 2 , transportation cost and application cost are high, farmers are not easy to accept it, and it is difficult to promote it on a large scale

Method used

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  • Soil conditioner capable of reducing activity of heavy metal in soil and preparation method thereof
  • Soil conditioner capable of reducing activity of heavy metal in soil and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The soil conditioner for reducing the activity of heavy metals in soil of the present embodiment is composed of mercapto-modified plant straw powder, inorganic porous material, alkali residue, humic acid mineral powder, compound microbial fertilizer, and heavy metal chelating agent;

[0040] The parts by weight of the mercapto-modified plant straw powder, inorganic porous material, alkali slag, humic acid mineral powder, compound microbial fertilizer and heavy metal chelating agent are: 3 parts of mercapto-modified plant straw powder, 15 parts of inorganic porous material 1 part of alkali slag, 20 parts of humic acid mineral powder, 2 parts of compound microbial fertilizer, 0.5 part of heavy metal chelating agent.

[0041] Wherein, the porosity of the thiol-modified plant straw powder is 75%, and the specific surface area is 0.20m 2 / g.

[0042] Wherein, the preparation method of the mercapto-modified plant straw powder:

[0043] (1) Collect corn stalks, wheat straws,...

Embodiment 2

[0061] The soil conditioner for reducing the activity of heavy metals in soil of the present embodiment is composed of mercapto-modified plant straw powder, inorganic porous material, alkali residue, humic acid mineral powder, compound microbial fertilizer, and heavy metal chelating agent;

[0062] The parts by weight of the mercapto-modified plant straw powder, inorganic porous material, alkali slag, humic acid mineral powder, compound microbial fertilizer and heavy metal chelating agent are: 7 parts of mercapto-modified plant straw powder, 45 parts of inorganic porous material 5 parts of alkali slag, 40 parts of humic acid mineral powder, 8 parts of compound microbial fertilizer, 3 parts of heavy metal chelating agent.

[0063] Wherein, the porosity of the thiol-modified plant straw powder is 85%, and the specific surface area is 0.30m 2 / g.

[0064] Wherein, the preparation method of the mercapto-modified plant straw powder:

[0065] (1) Collect corn stalks, wheat straws,...

Embodiment 3

[0083] The soil conditioner for reducing the activity of heavy metals in soil of the present embodiment is composed of mercapto-modified plant straw powder, inorganic porous material, alkali residue, humic acid mineral powder, compound microbial fertilizer, and heavy metal chelating agent;

[0084] The parts by weight of the mercapto-modified plant straw powder, inorganic porous material, alkali slag, humic acid mineral powder, compound microbial fertilizer and heavy metal chelating agent are: 5.5 parts of mercapto-modified plant straw powder, 30 parts of inorganic porous material 3 parts of alkali slag, 30 parts of humic acid mineral powder, 5 parts of compound microbial fertilizer, 1.8 parts of heavy metal chelating agent.

[0085] Wherein, the porosity of the thiol-modified plant straw powder is 80%, and the specific surface area is 0.25m 2 / g.

[0086] Preferably, the preparation method of the mercapto-modified plant straw powder:

[0087] (1) Collect corn stalks, wheat ...

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Abstract

The invention discloses a soil conditioner capable of reducing activity of heavy metal in soil and a preparation method thereof. The soil conditioner is prepared from sulfydryl modified plant straw powder, an inorganic porous material, caustic dross, humic acid mineral powder, a compound microbial fertilizer and a heavy metal chelating agent. According to parts by weight of the sulfydryl modifiedplant straw powder, the inorganic porous material, the caustic dross, the humic acid mineral powder, the compound microbial fertilizer and the heavy metal chelating agent, the sulfydryl modified plantstraw powder is 3 to 7 parts, the inorganic porous material is 15 to 45 parts, the caustic dross is 1 to 5 parts, the humic acid mineral powder is 20 to 40 parts, the compound microbial fertilizer is2 to 8 parts, and the heavy metal chelating agent is 0.5 to 3 parts. The soil conditioner disclosed by the invention can effectively reduce activity of the heavy metal in acidic heavy metal contaminated soil and further has the advantages of low cost, easiness in implementation, greenness and environmental friendliness.

Description

technical field [0001] The invention relates to the technical field of soil improvement, in particular to a soil conditioner for reducing the activity of heavy metals in soil and a preparation method thereof. Background technique [0002] With the rapid development of industry and the continuous increase of agricultural input intensity, a large number of heavy metals and other pollutants have entered the soil environment, which has caused heavy metal pollution in soil and has become a worldwide problem that has been widely concerned. According to reports, the cultivated land area polluted by cadmium, mercury, arsenic, chromium and lead in my country is nearly 20 million hm 3 , accounting for about 20% of the country's total arable land, has seriously affected the development of modern agriculture and social stability. [0003] The pollution of heavy metals in the soil directly leads to excessive heavy metal content in agricultural products, and then enters the human body th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40B09C1/08C05G3/04C05G3/00C09K101/00C09K109/00C05G3/80
CPCB09C1/08C05D9/00C05G3/00C05G3/80C09K17/40C09K2101/00C09K2109/00C05F11/00C05F11/02C05F11/08
Inventor 张鑫
Owner 张鑫
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