Passivation agent for treating heavy metal pollution of farmland soil and preparation method thereof

A heavy metal and soil technology, applied in chemical instruments and methods, soil conditioning materials, agriculture, etc., can solve problems such as the insignificant effect of soil remediation, achieve long-term and stable passivation effect, protect the ecological environment, and improve the effect of soil

Inactive Publication Date: 2019-04-16
GUANGDONG KAIYUAN ENVIRONMENT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Soil environmental pollution is affected by many factors, soil pollution has become complex and diverse, and the traditional single remediation agent has no obvious effect on the remediation of contaminated soil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] In this embodiment, a passivation agent for treating heavy metal pollution in farmland soil includes the following components in parts by weight: 1.5 parts of compound bio-organic fertilizer, 0.15 part of phosphate rock powder, and 0.15 part of attapulgite.

[0030] Further, the phosphate rock powder is microcrystalline phosphate rock powder, and the average particle diameter of the microcrystallized phosphate rock powder is 90nm.

[0031] Further, the preparation method of the compound biological organic fertilizer comprises the following steps:

[0032] (1) adjusting agent and cow dung are mixed, the C / N ratio that is adjusted to mixture is 25, and moisture content is 56%, after mixing uniformly, add modified nano white carbon black, the addition of described modified nano white carbon black is Cow dung dry matter quality 12%, obtain mixture A; Mixture A is piled up, carry out aerobic fermentation for the first time, obtain primary fermentation product;

[0033] (2) ad...

Embodiment 2

[0046] In this embodiment, a passivation agent for treating heavy metal pollution in farmland soil includes the following components in parts by weight: 1 part of compound bio-organic fertilizer, 0.1 part of phosphate rock powder, and 0.12 part of attapulgite.

[0047] Further, the phosphate rock powder is microcrystalline phosphate rock powder, and the average particle diameter of the microcrystallized phosphate rock powder is 50nm.

[0048] Further, the preparation method of the compound biological organic fertilizer comprises the following steps:

[0049] (1) adjuster and cow dung are mixed, the C / N ratio that is adjusted to mixture is 20, and moisture content is 55%, after mixing uniformly, add modified nano white carbon black, the addition of described modified nano white carbon black is Cow dung dry matter 10%, obtain mixture A; stack mixture A, carry out aerobic fermentation for the first time, obtain primary fermentation product;

[0050] (2) add humic acid compoundin...

Embodiment 3

[0062] In this embodiment, a passivation agent for treating heavy metal pollution in farmland soil includes the following components in parts by weight: 2 parts of compound bio-organic fertilizer, 0.15 part of phosphate rock powder, and 0.1 part of attapulgite.

[0063] Further, the phosphate rock powder is microcrystalline phosphate rock powder, and the average particle diameter of the microcrystallized phosphate rock powder is 150nm.

[0064] Further, the preparation method of the compound biological organic fertilizer comprises the following steps:

[0065] (1) adjuster and cow dung are mixed, the C / N ratio that is adjusted to mixture is 30, and moisture content is 65%, after mixing uniformly, add modified nano white carbon black, the addition of described modified nano white carbon black is Cow dung dry matter quality 15%, obtain mixture A; Stack mixture A, carry out aerobic fermentation for the first time, obtain primary fermentation product;

[0066] (2) add humic acid ...

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Abstract

The invention relates to the technical field of soil heavy metal pollution remediation, in particular to a passivation agent for treating heavy metal pollution of farmland soil and a preparation method thereof. The passivation agent is prepared from, by weight, 1-2 parts of composite bio-organic fertilizer, 0.1-0.2 part of phosphate rock powder and 0.1-0.2 part of attapulgite. The preparation method of the passivation agent comprises the following step that the composite bio-organic fertilizer and the phosphate rock powder are uniformly mixed according to a proportion to obtain the passivationagent for treating the heavy metal pollution of the farmland soil. The passivation agent can effectively reduce the effective-state content of heavy metal in the farmland soil and improve the soil remediation degree and the soil fertility, the passivation effect is long-acting and stable, the preparation method of the passivation agent is simple and efficient, the operation control is convenient,the product quality is stable, and the industrial production is facilitated.

Description

technical field [0001] The invention relates to the technical field of remediation of heavy metal pollution in soil, in particular to a passivation agent for treating heavy metal pollution in farmland soil and a preparation method thereof. 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 elements with significant biological toxicity such as mercury, cadmium, lead, chromium, and metalloid arsenic, as well as elements with certain toxicity such as zinc, copper, and nickel, which mainly come from mining waste residues, pesticides, wastewater, sludge, and Atmospheric deposition, etc. Excessive heavy metals can cause plant physiological dysfunction and nutritional imbalance. Elements such as cadmium and mercury have high enrichment coefficients in crop seeds. Even if they exceed food hygiene standards, they will not affect crop growth, d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/04C05G3/00C09K17/40C09K101/00C05G3/80
CPCC05B17/00C05G3/00C09K17/40C09K2101/00C05G3/80C05D3/02C05D5/00C05D9/00C05F3/00C05F11/00C05F11/02
Inventor 汪炎军魏伟李永辉刘捷麦泳诗
Owner GUANGDONG KAIYUAN ENVIRONMENT TECH
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