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A kind of green soil remediation agent and its preparation method and use method

A soil remediation agent and green technology are applied in the field of soil remediation to achieve the effects of promoting plant growth, simple preparation method and process, and repairing sandy soil

Active Publication Date: 2021-03-02
YULIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings of the above-mentioned prior art, the object of the present invention is to provide a green soil remediation agent and its preparation method and use method. The raw materials of the preparation method are easy to obtain and the operation is simple; the soil remediation agent can repair the current situation of soil pollution on the one hand. , On the one hand, it can improve soil nutrients, and at the same time, it can be recycled, and will not cause side effects on the soil. It has the characteristics of green, high efficiency, low cost, and no safety hazards.

Method used

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  • A kind of green soil remediation agent and its preparation method and use method
  • A kind of green soil remediation agent and its preparation method and use method
  • A kind of green soil remediation agent and its preparation method and use method

Examples

Experimental program
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Effect test

Embodiment 1

[0029] (1) Sampling:

[0030] Humic acid was purchased from the market, and the wind-blown sandy soil was taken from the Shenfu coal mine area; the nutrient solution consisted of 100mg L -1 K H 2 PO 4 , 450 mg L - 1 KNO 3 , 500 mg L -1 MgSO 4 , 1000 mg L -1 Ca(NO 3 ) 2 4H 2 O and deionized water.

[0031] Desert dominant plants can choose Artemisia annua, Camel thorn, etc.

[0032] Nanomagnetic Fe 3 o 4 Homemade, Magnetic Fe 3 o 4 / MgAl-LDH was synthesized by co-precipitation method, and all required drugs were analytically pure. Methods as below:

[0033] First synthesize Fe 3 o 4 Nanoparticles, 2.0g FeCl 3 ·6H 2 O was dissolved in 20 mL of ethylene glycol solvent, and 6 mL of N was added under magnetic stirring. 2 h 4 ·H 2 O (80 wt%) and 3.0 g NaOH. The mixture was then sealed in a 50 mL polytetrafluoroethylene-lined stainless steel autoclave and heated at 90 °C for 10 h. Then cool to room temperature, wash the resulting black powder with deionized ...

Embodiment 2

[0053] (1) Humic acid was purchased from the market, and the wind-blown sandy soil was taken from the Shenfu coal mining area; the nutrient solution consisted of 100mg L -1 K H 2 PO 4 , 450mgL -1 KNO 3 , 500 mg L -1 MgSO 4 , 1000 mg L -1 Ca(NO 3 ) 2 4H 2 O and deionized water. Nanomagnetic Fe 3 o 4 Homemade, Magnetic Fe 3 o 4 / MgAl-LDH was synthesized by co-precipitation method, and all required drugs were analytically pure. Methods as below:

[0054] Synthetic Magnetic Fe 3 o 4 / MgAl-LDH: synthesize Fe first 3 o 4 Nanoparticles, 2.0g FeCl 3 ·6H 2 O was dissolved in 20 mL of ethylene glycol solvent, and 6 mL of N was added under magnetic stirring. 2 h 4 ·H 2 O (80 wt%) and 3.0 g NaOH. The mixture was then sealed in a 50 mL polytetrafluoroethylene-lined stainless steel autoclave and heated at 90 °C for 10 h. Then cool to room temperature, wash the resulting black powder with deionized water three times, and then vacuum-dry at 55±5°C to obtain Fe 3 o 4...

Embodiment 3

[0075] (1) Humic acid was purchased from the market, and the wind-blown sandy soil was taken from the Shenfu coal mining area; the nutrient solution consisted of 100mg L -1 K H 2 PO 4 , 450mgL -1 KNO 3 , 500 mg L -1 MgSO 4 , 1000 mg L -1 Ca(NO 3 ) 2 4H 2 O and deionized water. Nanomagnetic Fe 3 o 4 Homemade, Magnetic Fe 3 o 4 The synthesis of / MgAl-LDH adopts the co-precipitation method, and the required drugs are all analytically pure. The method is as follows:

[0076] Synthetic Magnetic Fe 3 o 4 / MgAl-LDH: synthesize Fe first 3 o 4 Nanoparticles, 2.0g FeCl 3 ·6H 2 O was dissolved in 20 mL of ethylene glycol solvent, and 6 mL of N was added under magnetic stirring. 2 h 4 ·H 2 O (80 wt%) and 3.0 g NaOH. The mixture was then sealed in a 50 mL polytetrafluoroethylene-lined stainless steel autoclave and heated at 90 °C for 10 h. Then cool to room temperature, wash the resulting black powder with deionized water three times, and then vacuum-dry at 55±5°C t...

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Abstract

The invention discloses a green soil remediation agent and its preparation method and application method, by combining modified humic acid with magnetic Fe 3 o 4 / MgAl‑LDH reaction prepared, on the one hand magnetic Fe 3 o 4 / MgAl‑LDH carries nutrient-containing humic acid to improve the structure and composition of the soil and promote plant growth; on the one hand, Fe 3 o 4 Under the action of root microorganisms, / MgAl-LDH and humic acid can mutually stimulate active groups and improve soil enzyme activity. At the same time, these active functional groups are easy to form complexes with soil heavy metals, reducing the bioavailability of heavy metals. The raw materials used in this method are all cheap and easy-to-obtain compounds, and the preparation method and process are also very simple. On the one hand, the obtained restoration agent can provide nutrients necessary for the metabolism of plants, and on the other hand, it can passivate heavy metal pollutants; healthy and fast-growing The plants can in turn stabilize and improve the sandy soil, and finally achieve the purpose of repairing the sandy soil and greening the environment.

Description

technical field [0001] The invention belongs to the field of soil restoration, and relates to a green soil restoration agent, a preparation method and a use method thereof. Background technique [0002] The northern Shaanxi mining area is highly rich in mineral resources and relatively scarce in water resources. At the same time, long-term drought, strong winds, and short-term, irregular heavy rainfall have resulted in extremely severe wind erosion and desertification of the soil in this area, and the ecology is extremely fragile. In recent years, with the construction of energy and chemical bases in full swing, a large number of toxic and harmful pollutants have been discharged into the environment, and the area of ​​polluted soil has expanded year by year. The ecological security problems caused by land degradation and soil pollution have become increasingly prominent, and it is imminent to strengthen the research on soil restoration in this area. [0003] At present, soi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/40B09C1/08A01B79/02
CPCA01B79/02B09C1/08C09K17/40
Inventor 相玉琳相玉秀焦玉荣张智芳谢国民贾文博杨向超
Owner YULIN UNIV
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