Composite soil modifier and application thereof

A technology of soil improver and water-retaining agent, applied in the direction of application, soil conditioning materials, fertilizer mixture, etc., can solve problems such as the influence of soil fertilizer supply capacity, insufficient fertilizer supply, and the inability to meet the growth of pioneer herbal plants, etc., and achieve relief Soil erosion, prevention of future acid reflux, and low input costs

Inactive Publication Date: 2010-07-28
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the combination of municipal sludge and zeolite is improper, the soil's fertilizer supply capacity will be seriously affected, and even insufficient fertilizer supply will occur, which cannot meet the purpose of growing pioneer herbaceous plants.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Land improvement time: March 2006;

[0027] 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;

[0028] Soil acidity: pH value is 2.41;

[0029] Hole digging specifications: length 60cm x width 60cm x depth 40cm;

[0030] The dosage of soil chemical amendments is as follows: red mud 2kg, slaked lime 0.2kg, municipal sludge 1.2kg, zeolite 0.6kg.

[0031] Afforestation time: After the soil improvement was balanced in April 2006, Eucalyptus (lemon eucalyptus) was planted in the soil improvement hole, and the seeds of Paeonia japonicus were sowed on the surface soil of the soil improvement hole.

[0032] According to the survey on January 5, 2007, 102 surviving forest trees were treated with soil improvement, with a total surviv...

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Abstract

The invention discloses a composite soil modifier and an application thereof. The composite soil modifier comprises the following raw materials of red mud, hydrated lime, municipal sludge, zeolite and water-retaining agent, wherein, the mass ratio of red mud to hydrated lime to municipal sludge to zeolite is 10:1-2:6-12:3-6. The raw materials used by the composite soil modifier of the invention are mostly industrial waste and have low invested cost; the composite soil modifier can be used for treating contaminated soil of acid mine containing sulfide to enable contaminated soil to be suitable for the growth of multiple plants, thereby reaching the purpose of one-time treatment; when the composite soil modifier is utilized to modify soil, chemical treatment on subsoil is not in need, thereby saving expense. The composite soil modifier improves the ecological environment of contaminated soil and is good for environmental protection.

Description

technical field [0001] The invention relates to the field of soil improvers, in particular to a composite soil improver for repairing acidic mine polluted soil. Background technique [0002] Most formations containing coal, iron and non-ferrous metal ores contain various types of metal sulfides, which can be oxidized to produce sulfuric acid after contact with the air due to mining activities, ecological degradation of mining areas and discharge downstream Pollutants are a serious global environmental problem, and the existing acid mine water treatment methods are costly and only palliative. To fundamentally control the problem of acidic mineral water discharge, the focus should be on the source of pollution, namely (1) how to inhibit the oxidation of metal sulfides in the soil / weather / rock of the pollution source (i.e. change from potential acid to real acid); (2) How to effectively eliminate the acidic substances produced in the soil; (3) How to effectively control soil e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40C09K109/00
Inventor 林初夏卢文州马迎群黄少伟谢君陈晓阳司春花
Owner SOUTH CHINA AGRI UNIV
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