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Soil conditioner for repairing heavy metal contaminated farmland and using method thereof

A soil conditioner and heavy metal technology, which is applied in the field of soil conditioner for repairing heavy metal-contaminated farmland, can solve the problems of low removal rate of cadmium and lead, easy to cause harm again, and hinder crop growth, etc., to achieve rapid repair and enhanced passivation effect, the effect of reducing absorption

Inactive Publication Date: 2020-06-26
HAINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing soil amendments have a low removal rate of cadmium and lead in heavy metal-polluted farmland soil, and heavy metals are likely to cause harm again after re-enrichment and hinder crop growth

Method used

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  • Soil conditioner for repairing heavy metal contaminated farmland and using method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A soil improver for repairing heavy metal polluted farmland, comprising the following raw materials in parts by weight: 1 part of organic fertilizer, 1 part of biochar, 1 part of hydroxyapatite, 0.8 parts of water-retaining agent, 5 parts of banana stems, and 1 part of peanut meal , 3 parts of coconut meat dregs and 5 parts of compound algae powder;

[0025] The compound algae powder is prepared from sargassum, black algae and foxtail algae with a mass ratio of 1:3:0.4;

[0026] The coconut slag is obtained by pulverizing and pressing waste coconut meat;

[0027] The banana stalks are crushed into fragments with a diameter of 0.5-1 cm;

[0028] The biochar is biochar made from stalks;

[0029] The particle size of the organic fertilizer, biochar and hydroxyapatite is not greater than 1 mm.

[0030] The above raw materials are mixed to prepare a soil conditioner for repairing heavy metal polluted farmland.

Embodiment 2

[0032] A soil conditioner for repairing heavy metal-contaminated farmland, comprising the following raw materials in parts by weight: 1 part of organic fertilizer, 1.5 parts of biochar, 0.5 parts of hydroxyapatite, 1.2 parts of water-retaining agent, 8 parts of banana stems, and 4 parts of peanut meal , 6 parts of coconut meat dregs and 2 parts of compound algae powder;

[0033] The compound algae powder is prepared from sargassum, black algae and foxtail algae with a mass ratio of 1:5:0.2;

[0034] The coconut slag is obtained by pulverizing and pressing waste coconut meat;

[0035] The banana stalks are crushed into fragments with a diameter of 0.5-1 cm;

[0036] The biochar is biochar produced from wood waste;

[0037] The particle size of the organic fertilizer, biochar and hydroxyapatite is not greater than 1 mm.

[0038] The above raw materials are mixed to prepare a soil conditioner for repairing heavy metal polluted farmland.

Embodiment 3

[0040] A soil improver for repairing heavy metal polluted farmland, comprising the following raw materials in parts by weight: 1 part of organic fertilizer, 0.5 parts of biochar, 1.5 parts of hydroxyapatite, 0.9 parts of water-retaining agent, 7 parts of banana stems, and 3 parts of peanut meal , 5 parts of coconut meat dregs and 4 parts of compound algae powder;

[0041] The compound algae powder is prepared from sargassum, black algae and foxtail algae with a mass ratio of 1:5:0.3;

[0042] The coconut slag is obtained by pulverizing and pressing waste coconut meat;

[0043] The banana stalks are crushed into fragments with a diameter of 0.5-1 cm;

[0044] The biochar is biochar made from stalks;

[0045] The particle size of the organic fertilizer, biochar and hydroxyapatite is not greater than 1mm.

[0046] The above raw materials are mixed to prepare a soil conditioner for repairing heavy metal polluted farmland.

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Abstract

The invention provides a soil conditioner for repairing heavy metal contaminated farmland and a using method of the soil conditioner. The soil conditioner is prepared from the following raw materialsin parts by weight: 1 part of an organic fertilizer, 0.5 to 1.5 parts of charcoal, 0.5 to 1.5 parts of hydroxyapatite, 0.8 to 1.2 parts of a water-retaining agent, 5 to 8 parts of banana stalks, 1 to4 parts of peanut meal, 3 to 6 parts of coconut meat residues and 2 to 5 parts of composite algae powder. The composite algae powder is prepared from sargassum thunbergii, hydrilla verticillata and myriophyllum spicatum. According to the soil conditioner, all the components have a synergistic effect and jointly take effect on heavy metal contaminated farmlands, contact reaction with soil is achieved to the maximum extent, chelation with heavy metal ions is promoted, the passivation effect is enhanced, the soil structure is improved, and meanwhile the soil fertility is improved.

Description

technical field [0001] The invention relates to the technical field of soil conditioners, in particular to a soil conditioner for repairing heavy metal polluted farmland and a method for using the same. Background technique [0002] Heavy metal pollution in farmland is soil pollution caused by excessive deposition of heavy metals in the soil. Heavy metals polluting farmland soil mainly include cadmium, lead and other elements with significant biological toxicity. Mainly from mining waste, pesticides, wastewater, sludge and atmospheric deposition. The content of heavy metals in the soil increases, leading to comprehensive environmental problems such as the decline of soil productivity, the pollution of agricultural products, and the destruction of the ecological environment. Among them, cadmium is one of the most toxic heavy metals in the environment and the most commonly polluted farmland. After the heavy metals in the soil are absorbed by plants, they can be enriched in p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40B09C1/08C09K101/00
CPCB09C1/08C09K17/40C09K2101/00
Inventor 朱治强洪怡李栋黄青谢璨李治东
Owner HAINAN UNIVERSITY
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