Artificial soil, and formulating method and use thereof

A technology for artificial soil and fly ash, applied in the application, soil conditioning materials, chemical instruments and methods, etc., to achieve the effects of sufficient supply, economical consumption, and easy availability of raw materials

Inactive Publication Date: 2009-05-27
SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reports at home and abroad basically focus on the performance of fly ash passivation sludge mixed with different types of natural soils, and the research on the performance of different proportions of fly ash to sludge mixed with artificial soil without adding natural soil. Not yet reported

Method used

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  • Artificial soil, and formulating method and use thereof
  • Artificial soil, and formulating method and use thereof
  • Artificial soil, and formulating method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The artificial soil is composed of fly ash with a water content of 7.54% and municipal sludge with a water content of 81.01%.

[0018] Preparation method: air-dry the collected fly ash with a water content of 7.54% in a natural state to a water content of 1-5%, and at the same time air-dry the collected sludge with a water content of 81.01% in a natural state to a water content of 55- 60%, and then mix the two by weight fraction fly ash: sludge = 1:1 to obtain (see Table 1).

[0019] Table 1 Nutrient content of fly ash passivation sludge artificial soil

[0020]

[0021] It shows that organic matter and available nitrogen, phosphorus and potassium nutrient contents in the artificial soil of the present invention all belong to high fertility level. The fly ash is the newly discharged fly ash collected from the ash storage tank of the No. 2 Iron and Steel Electric Power Plant of Liaoning Province, and the sample is collected by random sampling method; the sludge is co...

Embodiment 2

[0023] The collected raw materials, fly ash and municipal sludge, are air-dried in a natural state, and other treatment methods such as high-temperature drying are not used. When the sludge is air-dried until the water content is 55-60%, and the water content of the fly ash is 1-5%, the fly ash and the sludge are mixed in a weight ratio of 1:1, 3:1 and 2:1. Treatment III , I, II. III, I, II three kinds of artificial soil saturated water ratios are 66.55%, 58.98%, 61.9%; The water holding time of artificial soil of the present invention is 21 days, 14 days and 18 days; Days evaporated 26.17%, 42.73% and 34.24%. (see figure 1 ).

Embodiment 3

[0025] Air-dry the collected fly ash with a water content of 8-10% to a water content of 3-5%, and at the same time air-dry the collected sludge with a water content of 90-95% to a water content of 60%, and then combine the fly ash with The sludge is mixed at a weight ratio of 1:2 and 3:2 to obtain artificial soil.

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Abstract

The invention relates to ecological restoration, in particular to artificial soil and a preparation method thereof. The artificial soil consists of urban solid waste fly ash and sludge. The preparation method comprises the following steps: airing the fly ash and the sludge till water contents reach 1 to 5 percent and 55 to 60 percent of water content respectively, and mixing the fly ash and the sludge according to weight portion ratio of 3:1-1:2 to obtain the artificial soil. The preparation method realizes resource utilization of the urban solid waste; and the prepared artificial soil has better water retention and water storage performance, is close to meadow brown earth, has higher nutrient content at the same time, and has the heavy metal content far lower than national agricultural standard. The artificial soil can be used for replacing natural soil during the restoration of abandoned lands of mines. The preparation method realizes the resource utilization of the urban solid waste, uses waste to treat waste, and changes waste into valuable.

Description

technical field [0001] The invention relates to ecological restoration, in particular to artificial soil and its preparation method. Background technique [0002] my country is rich in mineral resources, but mining also occupies and destroys a large amount of land resources. According to statistics, as of 2003, my country's mining industry has destroyed land areas of 140,000 to 200,000 km 2 , and at 200km 2 / year is increasing. The destruction of the mine's ecological environment has brought about a series of environmental problems: water ripple interference and water pollution, air pollution and microclimate disturbance, soil degradation, and the formation of secondary geological disasters. Therefore, the ecological restoration of mine abandoned land is of great significance. However, most of the mines in our country are built in mountainous areas, and there are very few soil sources. After years of mining, it is becoming more and more difficult to obtain soil. Many min...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00B09B3/00B09C1/00C09K17/00C05F7/00
CPCY02A40/20
Inventor 孙铁珩张鸿龄孙丽娜马国峰
Owner SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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