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A method for reducing greenhouse gas emission in heavy metal polluted soil

A greenhouse gas and soil technology, applied in the restoration of polluted soil, etc., can solve the problems of poor soil application effect, short duration, and large variation in emission reduction effects, and achieve the effect of heavy metal pollution control and reduced emissions

Active Publication Date: 2022-06-24
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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  • A method for reducing greenhouse gas emission in heavy metal polluted soil
  • A method for reducing greenhouse gas emission in heavy metal polluted soil
  • A method for reducing greenhouse gas emission in heavy metal polluted soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Hydroxyapatite (HAP) is mainly prepared from calcium nitrate and phosphoric acid by a 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. First, the 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 min, and then aged for 24 h.

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

[0028] 4. Grind the dried filter cake, and then use a muffle furnace for calcination for 12h (3h at...

Embodiment 2

[0031] 1. Prepare 0.025mol / L Ca(NO 3 ) 2 and 0.3mol / L of H 3 PO 4 solution. First, the 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, the reaction was continued for 40 min, and then aged for 36 h.

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

[0034] 4. Grind the dried filter cake, and then use a muffle furnace for calcination for 12h (3h at room temperature to 600°C, calcined at 600°C for 9h), and then grind again after calcination to obtain HAP powder, pass 180 mesh Save after sieving.

[0035] ...

Embodiment 3

[0037] 1. Prepare 0.025mol / L Ca(NO 3 ) 2 and 0.3mol / L of H 3 PO 4 solution. First, the 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 min, and then aged for 24 h.

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

[0040] 4. Grind the dried filter cake, and then use a muffle furnace for calcination for 12h (3h at room temperature to 600°C, calcined at 600°C for 8h), and then grind again after calcination to obtain HAP powder, over 180 mesh Save after sievi...

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Abstract

The invention discloses a method for reducing greenhouse gas emission in heavy metal-polluted soil, and relates to the technical field of greenhouse gas nitrous oxide emission reduction. Specifically, adding hydroxyapatite to the soil effectively reduces the emission of soil nitrous oxide, and at the same time realizes It is very suitable for the promotion and use of nitrous oxide emission reduction in polluted soil.

Description

technical field [0001] The invention relates to the technical field of greenhouse gas emission reduction, in particular to a method for emission reduction of greenhouse gas 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, this biomimetic material can be used as a bone repair material and The biocompatible coating of bioimplant materials with high degradation rate has good medical value and is environmentally friendly. Meanwhile, HAP is a promising bio-calcium phosphate material with broad prospects in the treatment of air, water and soil pollution. Due to its strong adsorption capacity, acid-base tunability, ion exchange capacity and good thermal stability, it is widely used in heavy metal treatment. Materials for making HAP can come from bones, FGD gypsum (one of the largest wastes from coal-fired power plants), etc., a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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