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Method for fixing pollutants in pollution source soil in abandoned mine fields and application thereof

A fixing method and technology of pollutants, applied in the field of resource and environment restoration, can solve the problems of short validity period, high cost, long validity period, etc., and achieve the effect of simple and convenient operation, less engineering effort and quick results

Active Publication Date: 2010-06-09
广东华农大城市规划设计院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] This method utilizes the chemical remediation method to control ore pollution, especially for the pollution remediation problem caused by the discharge of acidic mineral water. At present, the chemical neutralization media mainly used abroad are: lime, calcium carbonate, sodium carbonate, sodium hydroxide, etc., but these The method generally has shortcomings such as short validity period and high cost, and is not suitable for large-scale and long-term use. However, the improver of this method is red mud, an industrial waste, which not only has low cost, but also has a long validity period, which can achieve the purpose of treating waste with waste

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1 Pilot experiment on the fixation method of mine pollution source pollutants in soil

[0024] Soil improvement pilot test time: March 2006.

[0025] Selection site for afforestation test: Dabaoshan dump, above the alum water pit, the afforestation site is about 780 meters above sea level, the topsoil is completely stripped during the mining process, leaving only the parent material, most of the rocks are exposed, and the soil is highly acidic;

[0026] Soil acidity: pH value is 2.41;

[0027] Hole digging specifications: length 60cm x width 60cm x depth 40cm;

[0028] Dosage of soil chemical amendment: red mud 2kg;

[0029] Fertilizer application: 500g of phosphate fertilizer + 250g of compound fertilizer;

[0030] Afforestation time: 30 days after soil improvement in April, 2006, plant eucalyptus (lemon eucalyptus) in the soil improvement hole, and sow the seeds of vetch on the surface soil of the soil improvement hole.

[0031] According to the survey on ...

Embodiment 2

[0034] Example 2 Pilot experiment on the fixation method of mine pollution source pollutants in soil

[0035] Soil improvement pilot test time: March 2006.

[0036] Afforestation test selection site: Qixingdun dump site, above the alum water pit, the afforestation site is about 520 meters above sea level, the topsoil is completely stripped during the mining process, leaving only the parent material, most of the rocks are exposed, and the soil is highly acidic;

[0037] Soil acidity: pH value is 2.97;

[0038] Hole digging specifications: length 60cm x width 60cm x depth 40cm;

[0039] Dosage of soil chemical amendment: red mud 2.5kg;

[0040] Fertilizer application: 550g phosphate fertilizer + 270g compound fertilizer;

[0041] Afforestation time: in April 2006 (40 days) after the improvement of soil balance, plant eucalyptus (lemon eucalyptus) in the improvement soil hole, and sow the seeds of vetch on the surface soil of the improvement soil hole.

[0042] According to t...

Embodiment 3

[0044] Example 3 Pilot experiment on the fixation method of mine pollution source pollutants in soil

[0045] Soil improvement pilot test time: March 2006.

[0046] Selection site for afforestation test: Mamazhang dump site, above the alum water pit, the afforestation site is about 530 meters above sea level, the topsoil is completely stripped during the mining process, leaving only the parent material, most of the rocks are exposed, and the soil is highly acidic;

[0047] Soil acidity: pH value is 2.86;

[0048] Hole digging specifications: length 60cm x width 60cm x depth 40cm;

[0049] Dosage of soil chemical amendment: red mud 2.8kg;

[0050] Fertilizer application: 550g of phosphate fertilizer + 300g of compound fertilizer;

[0051] Afforestation time: in April 2006 (35 days) after the improvement of soil balance, plant eucalyptus (lemon eucalyptus) in the improvement soil hole, and sow the seeds of chrysanthemum on the surface soil of the improvement soil hole.

[00...

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PUM

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Abstract

The invention discloses a method for fixing pollutants in pollution source soil in abandoned mine fields and application thereof. The fixing method comprises the steps of loosening the soil, digging holes, adding modifier and fertilizer to balance the soil in the holes, planting energy trees in the soil in the holes, sowing pioneer grass seeds on the topsoil in the holes, and the like. The invention uses chemical modifier and fertilizer to modify the planting condition of the polluted soil in mine areas, then interplants pioneer grass, fast-growing energy trees and other plants to effectively fixe substances such as heavy metal pollutants in soil, avoid the pollutants from being discharged to downstream areas in the form of acidic mine waste water to pollute the environment and damaging the ecology.

Description

technical field [0001] The invention belongs to the technical field of resource and environment restoration, and in particular relates to a method and application for fixing pollutants from mine pollution sources in soil. Background technique [0002] The activation, discharge and pollution of the surrounding agricultural soil in the metal mining area are mainly caused by the oxidation of various metal sulfides (mainly pyrite). There are almost all kinds of heavy metal sulfides in metal-bearing ore formations. During mining activities, if these heavy metal sulfides are not properly treated, they will be oxidized to generate sulfuric acid after contacting with air. The soil formed in this environment is called acid sulfate soil in the mining area. Under strong acidic conditions, the solubility of many heavy metal elements increases to reach or exceed the level of toxic concentrations, while some nutrients cannot meet the needs of plant growth due to the decrease in solubilit...

Claims

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Application Information

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IPC IPC(8): B09C1/00B09C1/08A01B79/02
Inventor 陈晓阳谢君林初夏卢文州陈国涛马迎群黄少伟梁计南
Owner 广东华农大城市规划设计院有限公司
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