Land pollution remediation material and application thereof

A pollution remediation and land technology, applied in soil conditioning materials, applications, organic fertilizers, etc., can solve problems such as high prices, food safety issues, and environmental pollution

Inactive Publication Date: 2017-12-29
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of my country's energy and chemical industry bases are located in ecologically fragile areas, desertified soil, the nutrients needed for planting are easily lost, resulting in malnutrition of the plants, and the pesticides used at the same time are easily lost, causing environmental pollution, and the heavy metals in the soil polluted by industry It is easily absorbed by crops and may cause food safety problems
The use of traditional adsorption materials for water and fertilizer retention in sandy soil and adsorption and solidification of heavy metals has the problem of high prices

Method used

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  • Land pollution remediation material and application thereof
  • Land pollution remediation material and application thereof
  • Land pollution remediation material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The preparation method of the land pollution remediation material of this embodiment is as follows:

[0015] Under the condition of 1200°C, lignite with a volatile content of 32% and an ash content of less than 20wt% is gasified with oxygen and water vapor to produce coal gas, and the carbon-based materials produced by the reaction are land pollution restoration materials. The oxygen-to-coal ratio is Under the condition of 0.7m3 / kg, the gas-to-coal ratio is 0.2kg / kg, and the carbon content of the land pollution remediation material is 60wt%.

[0016] The prepared material is added to the sandy soil according to the ratio of 50wt% of the soil mass, and the heavy metal solution of the simulated soil pollution is used to test the removal rate of the material to the heavy metal. The results are shown in Table 1:

[0017] Table 1

[0018]

starting stock solution

1 hour

2 hours

3 hours

4 hours

Cr6+ content (mg)

0.3754

0.0731

0.05...

Embodiment 2

[0023] The preparation method of the land pollution remediation material of this embodiment is as follows:

[0024] At 1350°C, bituminous coal with a volatile content of 40% and an ash content of less than 20wt% is gasified with oxygen and water vapor to produce coal gas, and the carbon-based materials produced by the reaction are land pollution restoration materials. The oxygen-to-coal ratio is At 0.8m3 / kg, the gas-to-coal ratio is 0.3kg / kg, and the carbon content of the land pollution remediation material is 65wt%.

[0025] The prepared material was added to the sandy land according to the amount of 40wt% of the soil quality, and the heavy metal solution of simulated soil pollution was used to test the removal rate of the material to the heavy metal. The results are shown in Table 3:

[0026] table 3

[0027]

starting stock solution

1 hour

2 hours

3 hours

4 hours

Cr6+ content (mg)

0.3754

0.0629

0.0509

0.0459

0.0306

A...

Embodiment 3

[0032] The preparation method of the land pollution remediation material of this embodiment is as follows:

[0033] Under the condition of 1100℃, rice husk is gasified with oxygen and water vapor to produce gas, and the carbon-based materials produced by the reaction are land pollution restoration materials. Among them, when the oxygen-coal ratio is 0.8m3 / kg, is 0.4kg / kg, and the carbon content of the land pollution remediation material is 70wt%.

[0034] The prepared material was added to the sandy land according to the soil mass 30wt% molar ratio, and the heavy metal solution of simulated soil pollution was used to test the material's removal rate of heavy metals. The results are shown in Table 5:

[0035] table 5

[0036]

starting stock solution

1 hour

2 hours

3 hours

4 hours

Cr6+ content (mg)

0.3754

0.0940

0.0563

0.0415

0.0270

Adsorption rate%

0

75％

85％

89％

93％

[0037] The organic pollutants i...

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Abstract

The invention relates to a land pollution remediation material and an application thereof in land remediation and aims to solve the problem of existing land pollution. A preparation method of the soil pollution remediation material comprises the steps as follows: a raw material, oxygen and water vapor are subjected to a gasification reaction under the gasification condition, and a reaction byproduct carbon-based material is the land pollution remediation material. The carbon-based porous adsorbing material prepared with a coal or biomass gasification process is used for improving the sandy soil structure and used as a soil water and fertilizer retention adsorbing material, so that heavy metals in sandy soil are adsorbed and immobilized, the water and fertilizer retention roles are played, and ecological treatment of sandy soil in energy and chemical areas is realized.

Description

technical field [0001] The invention belongs to the field of eco-environmental protection and the interdisciplinary field of material preparation, and specifically relates to a land pollution restoration material and its application. Background technique [0002] Soil pollution is a major environmental problem that needs to be solved urgently. The overall situation of the soil environment in my country is not optimistic, the soil pollution is serious in some areas, the soil environment quality of cultivated land is worrying, and the soil environment problems of industrial and mining abandoned land are prominent. The causes of soil pollution are complex and the hazards are serious. At the same time, the soil environmental supervision and management system is not perfect, and soil environmental protection is facing many challenges. Improve soil pollution prevention and control policies, regulations and standards, effectively strengthen the control of soil pollutant sources, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/00C10J3/02C10J3/16C10J3/46C10J3/60C10J3/62B01J20/20C09K101/00
CPCC09K17/00B01J20/20C10J3/02C10J3/16C10J3/463C10J3/466C10J3/60C10J3/62C10J2300/092C10J2300/093C10J2300/0959C10J2300/0976C10J2300/1631
Inventor 赵鹏谭细绢王晓峰
Owner CHANGAN UNIV
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