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Greenhouse gas emission reduction method for heavy metal contaminated soil

A technology of greenhouse gases and polluted soil, applied in the restoration of polluted soil, etc., can solve the problems of short duration, poor soil application effect, and large variation of emission reduction effect, so as to achieve reduced emissions and realize the goal of heavy metal pollution control Effect

Active Publication Date: 2022-01-14
JIANGXI AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing greenhouse gas emission reduction methods have disadvantages such as poor application effect on specific soils, narrow application range, large variation in emission reduction effects, and short duration. There is an urgent need for a method with a wide application range and good emission reduction effects, especially in heavy metal-contaminated soils. It can still exert the emission reduction effect, and can realize the method of heavy metal pollution control in time, and realize the effective emission reduction of heavy metal polluted soil

Method used

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  • Greenhouse gas emission reduction method for heavy metal contaminated soil
  • Greenhouse gas emission reduction method for heavy metal contaminated soil
  • Greenhouse gas emission reduction method for heavy metal contaminated soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Hydroxyapatite (HAP) is mainly prepared from calcium nitrate and phosphoric acid through the sol-gel method. The main operation steps are:

[0025] 1. Prepare 0.025mol / L Ca(NO 3 ) 2 and 0.3mol / L of H 3 PO 4 solution. Ca(NO 3 ) 2 The solution was poured into a three-necked flask, and H was added while stirring. 3 PO 4 Solution (Ca(NO 3 ) 2 solution and H 3 PO 4 The volume ratio of the solution is 2:1), and the temperature of the system is maintained at 40-50°C.

[0026] 2. Add ammonia water to adjust the pH of the solution so that the pH value is controlled at 10.00. After the dropwise addition was completed, the reaction was continued for 40 minutes, and then aged for 24 hours.

[0027] 3. The colloid obtained after the reaction was completed was washed 3 times with distilled water, filtered with suction to obtain a filter cake, and dried in a drying oven at 80°C.

[0028] 4. Grind the dried filter cake, and then calcinate it in a muffle furnace for 12 ho...

Embodiment 2

[0031] 1. Prepare 0.025mol / L Ca(NO 3 ) 2 and 0.3mol / L of H 3 PO 4 solution. Ca(NO 3 ) 2 The solution was poured into a three-necked flask, and H was added while stirring. 3 PO 4 Solution (Ca(NO 3 ) 2 solution and H 3 PO 4 The volume ratio of the solution is 2:1), and the temperature of the system is maintained at 40-50°C.

[0032] 2. Add ammonia water to adjust the pH of the solution so that the pH value is controlled at 9.00. After the dropwise addition was completed, the reaction was continued for 40 minutes, and then aged for 36 hours.

[0033] 3. The colloid obtained after the reaction was completed was washed with distilled water for 4 times, filtered with suction to obtain a filter cake, and dried in a drying oven at 80°C.

[0034] 4. Grind the dried filter cake, and then calcinate it in a muffle furnace for 12 hours (3 hours from normal temperature to 600°C, then calcinate at 600°C for 9 hours), and then grind it again to obtain HAP powder, pass through 180...

Embodiment 3

[0037] 1. Prepare 0.025mol / L Ca(NO 3 ) 2 and 0.3mol / L of H 3 PO 4 solution. Ca(NO 3 ) 2 The solution was poured into a three-necked flask, and H was added while stirring. 3 PO 4 Solution (Ca(NO 3 ) 2 solution and H 3 PO 4 The volume ratio of the solution is 2:1), and the temperature of the system is maintained at 40-50°C.

[0038] 2. Add ammonia water to adjust the pH of the solution so that the pH value is controlled at 11.00. After the dropwise addition was completed, the reaction was continued for 40 minutes, and then aged for 24 hours.

[0039] 3. The colloid obtained after the reaction was completed was washed with distilled water for 5 times, filtered with suction to obtain a filter cake, and dried in a drying oven at 80°C.

[0040] 4. Grind the dried filter cake, and then calcinate it in a muffle furnace for 12 hours (3 hours from room temperature to 600°C, then calcined at 600°C for 8 hours), and then grind it again to obtain HAP powder, pass through 180 m...

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Abstract

The invention discloses a greenhouse gas emission reduction method for heavy metal contaminated soil, and relates to the technical field of greenhouse gas nitrous oxide emission reduction. Particularly, the method adds hydroxyapatite into soil to effectively reduce the emission of nitrous oxide in the soil, realizes heavy metal pollution treatment at the same time, and is very suitable for being popularized and used for reducing the emission of nitrous oxide in the contaminated soil.

Description

technical field [0001] The invention relates to the technical field of greenhouse gas emission reduction, in particular to a method for reducing greenhouse gas emission in heavy metal polluted soil. Background technique [0002] Hydroxyapatite (HAP), the main mineral component of bones and teeth, is the main factor affecting the hardness and strength of bones and teeth. Due to its unique structure and inherent characteristics, this biomimetic material can be used as a bone repair material and A biocompatible coating for bioimplantation materials with high degradation rate, which has good medical value and is environmentally friendly. Meanwhile, HAP is a promising biocalcium phosphate material, which has great prospects in the treatment of air, water, and soil pollution. Due to its strong adsorption capacity, acid-base adjustability, ion exchange capacity, and good thermal stability, it is widely used in heavy metal treatment. The materials used to make HAP can come from bo...

Claims

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Application Information

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IPC IPC(8): B09C1/08
CPCB09C1/08Y02C20/10
Inventor 张令高宇王佰慧白健李爱新罗来聪赖晓琴
Owner JIANGXI AGRICULTURAL UNIVERSITY
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