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Soil improver and method for improving soil

A soil conditioner and solvent technology, applied in the field of soil improvement, can solve the problems of secondary pollution, infeasibility and high input cost

Inactive Publication Date: 2016-08-10
ZHONGDA TESTING (HUNAN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the methods therein inevitably have the problems of high input cost and easy to cause secondary pollution, and are not feasible.

Method used

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  • Soil improver and method for improving soil
  • Soil improver and method for improving soil
  • Soil improver and method for improving soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A soil conditioner, comprising mineral powder A, modified powder B, modified powder C, and modified solvent in a weight ratio of 15:5:5:1, wherein,

[0048] The particle size of the mineral powder A is 30 meshes, and it is formed by mixing 30 parts by weight of sulfide ore and 30 parts by weight of iron-manganese oxide mineral powder;

[0049] The particle size of the improved powder B is 90 mesh, which is mixed with 15 parts by weight of bentonite and 5 parts by weight of persulfate compound;

[0050] The particle size of the improved powder C is 90 mesh, which consists of 20 parts by weight of red mud powder;

[0051] The improved solvent is formed by mixing 2 parts by weight of humic acid and 2 parts by weight of organic solvent.

[0052] The organic solvent is polycarboxylic acid mother liquor.

Embodiment 2

[0054] A soil conditioner, comprising mineral powder A, modified powder B, modified powder C, and modified solvent in a weight ratio of 10:3:3:1, wherein,

[0055] The particle size of the mineral powder A is 30 mesh, which is mixed by 30 parts by weight of sulfide ore and 10 parts by weight of iron-manganese oxide mineral powder;

[0056] The particle diameter of the improved powder B is 90 meshes, which is formed by mixing 10 parts by weight of bentonite and 2 parts by weight of persulfate compound powder;

[0057] The particle size of the improved powder C is 90 mesh, which is mixed with 10 parts by weight of red mud and 2 parts by weight of DTC-chelating agent powder;

[0058] The improved solvent is prepared by mixing 2 parts by weight of humic acid and 2 parts by weight of reactive colloid.

[0059] Wherein, the sulfate compound is a 1:1 compound of ferrous sulfate heptahydrate and sodium persulfate, and the reactive colloid is silicic acid colloid.

experiment example 1

[0060] Experimental example 1 A case of soil pollution control in Hunan mining area

[0061] 1. Treat the soil polluted by heavy metals in the Hunan mining area. After testing, the situation of the contaminated soil in the mining area is shown in Table 1 below:

[0062] Table 1: Detection results of heavy metal-contaminated soil in Hunan mining area

[0063] pH

moisture content

organic matter

CEC

texture

5.5

4％

1.82％

20mmol / 100g

Silty soil

[0064] 2. Use the following process to treat the above soil:

[0065] Step 1: Take the improvement reagent and mineral powder A according to the weight ratio of 1:15, mix evenly, dilute the mixture according to the ratio of 1:100 to water, and evenly spray the diluted substance on the excavated loose silty soil;

[0066] Step 2: within 1 hour after the first step, take the improvement reagent B which is 5 times the weight of the improvement reagent and apply it evenly to the farmland or...

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Abstract

The invention relates to a soil conditioner and a method for improving soil. The soil conditioner comprises mineral powder A, modified powder B, modified powder C and a modified solvent, wherein the mineral powder A is selected from sulfide mineral powder, oxide mineral powder, clay One or more of mineral powders; modified powder B is selected from one or more of bentonite, persulfate compound, kaolin; modified powder C is selected from red mud, DTC-chelating agent, iron manganese oxide One or more of the mineral powders, the improving solvent is selected from one or more of humic acid, organic solvents, and reactive colloids; the soil improving agent can adjust the pH value of the soil and the dissolved products of environmental mineral materials and heavy metal ions The chemical immobilization effect and the interaction with soil microorganisms permanently fix the ionic heavy metals in the soil in the newly formed soil minerals, inhibit the absorption of heavy metal ions by crops, and achieve the purpose of reducing the heavy metal content of crops.

Description

technical field [0001] The invention belongs to the technical field of soil improvement, specifically relates to a soil conditioner and a method for improving soil, and more particularly relates to a soil conditioner and a method for treating heavy metal-polluted soil based on a mineral method. Background technique [0002] At present, the problem of heavy metal pollution in soil in China has become a major environmental problem that has attracted great attention from the society after air pollution and water pollution, and urgently needs to be solved. Among them, heavy metal pollutants such as chromium, lead, and cadmium are more common in areas with severe soil pollution, and especially in farmland areas. Cadmium pollution is more serious. [0003] Existing methods for treating heavy metal minerals in soil can be roughly divided into: guest soil method, soil replacement method, deep plowing method, electrodynamic restoration method, leaching method, bioremediation method a...

Claims

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Application Information

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IPC IPC(8): C09K17/40B09C1/08C09K101/00C09K109/00
CPCC09K17/40B09C1/08B09C2101/00C09K2101/00C09K2109/00
Inventor 尹小波王泉孙圣黄娟娟
Owner ZHONGDA TESTING (HUNAN) CO LTD
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