Soil remediation agent as well as preparation method and using method thereof

A technology of soil remediation agent and sludge, which is applied in the field of soil remediation to achieve the effect of improving sandy soil, curbing the spread and reducing deterioration

Active Publication Date: 2019-01-18
YULIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the above-mentioned shortcoming of the prior art, the object of the present invention is to provide a kind of soil remediation agent and its preparation method and using method, and this preparation method raw material is easy to get, and is easy to operate; On the one hand, it can improve soil nutrients, and it is convenient and safe to use

Method used

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  • Soil remediation agent as well as preparation method and using method thereof
  • Soil remediation agent as well as preparation method and using method thereof
  • Soil remediation agent as well as preparation method and using method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Sampling:

[0032] The urban domestic sludge was taken from the urban sewage treatment plant, and the aeolian soil was taken from the Shenfu coal mine area; the nano-magnetic Fe 3 o 4 purchased from the market.

[0033] (2) Preparation of restoration agent:

[0034] A certain amount of calcium oxide and municipal domestic sludge were mixed thoroughly according to the mass ratio of 11.6% (wt / wt), and then the mixture was subjected to ultrasonic action (108W, 20.024kHz) in water at 66°C for 106min. Then filter to obtain the sludge supernatant, and spray-dry the obtained sludge supernatant to obtain sludge amino acid powder;

[0035] Take CaCl 2 and FeCl 3 Place the nanomagnetic Fe in 100mL deionized water according to the Ca / Fe molar ratio of 1.6:1. 3 o 4 Added to the above salt solution, keeping Ca 2+ / Fe 3 o 4The molar ratio is between 49:1. Stir rapidly with a magnetic stirrer in an 88 °C water bath for 10 seconds. Then, under magnetic stirring, 20 wt% ...

Embodiment 2

[0050] (1) Urban domestic sludge, sandy soil, nano-magnetic Fe 3 o 4 The sampling is the same as in Example 1.

[0051] (2) Preparation of restoration agent:

[0052] A certain amount of calcium oxide and municipal domestic sludge were mixed thoroughly according to the mass ratio of 12% (wt / wt), and then the mixture was subjected to ultrasonic action (108W, 20.024kHz) in water at 70°C for 116min. Then filter to obtain the sludge supernatant, and spray-dry the obtained sludge supernatant to obtain sludge amino acid powder;

[0053] Take CaCl 2 and FeCl 3 Place the nanomagnetic Fe in 100mL deionized water according to the Ca / Fe molar ratio of 1.8:1. 3 o 4 Added to the above salt solution, keeping Ca 2+ / Fe 3 o 4 The molar ratio is between 50:1. Stir rapidly with a magnetic stirrer in an 89 °C water bath for 10 seconds. Then, under magnetic stirring, 20 wt% NaOH solution was slowly added to the salt solution to 200 mL, and stirring was continued for 40 minutes. The so...

Embodiment 3

[0069] (1) Urban domestic sludge, sandy soil, nano-magnetic Fe 3 o 4 The sampling is the same as in Example 1.

[0070] (2) Preparation of restoration agent:

[0071] A certain amount of calcium oxide and municipal domestic sludge were mixed thoroughly according to the mass ratio of 12.7% (wt / wt), and then the mixture was subjected to ultrasonic action (108W, 20.024kHz) in water at 72°C for 134min. Then filter to obtain the sludge supernatant, and spray-dry the obtained sludge supernatant to obtain sludge amino acid powder;

[0072] Take CaCl 2 and FeCl 3 Place the nano-magnetic Fe 3 o 4 Added to the above salt solution, keeping Ca 2+ / Fe 3 o 4 The molar ratio is between 49:1 and 52:1. Stir rapidly with a magnetic stirrer for 10 seconds in a water bath at 88-90°C. Then, under magnetic stirring, 20 wt% NaOH solution was slowly added to the salt solution to 200 mL, and stirring was continued for 40 minutes. The solution was aged at 80°C for 18.5 hours with stirring. ...

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Abstract

The invention discloses a soil remediation agent as well as a preparation method and a using method thereof. The soil remediation agent is synthesized and prepared from municipal domestic sludge aminoacid and magnetic Fe3O4 / CaFe-LDH (Lactate Dehydrogenase). In the soil remediation agent, the amino acid is adsorbed between hydrotalcite layers or on a hydrotalcite layer, on one hand, the amino acidcan be protected from being infected by bacteria, and the amino acid can be used as soil base fertilizer for application; on the other hand, multiple heavy metal can be adsorbed due to the unique structure characteristics of hydrotalcite, the bio-availability of soil heavy metal can be reduced, meanwhile, used hydrotalcite can be conveniently recycled and reutilized due to magnetism, and soil hardening or deterioration of physic-chemical properties cannot be caused due to long-term fertilization, so that the soil remediation agent can be applied securely. Raw materials applied by the technology are waste or cheap and easy-to-obtain compounds, and the preparation and the application are also very convenient; on one hand, necessary nutrients for metabolism of plants can be provided by the obtained soil remediation agent, on the other hand, aeolian sandy soil can be stabilized and improved by growth of the plants in return, and finally, the purposes of remediating the aeolian sandy soiland greening the environment can be achieved.

Description

technical field [0001] The invention belongs to the field of soil restoration, and relates to a soil restoration agent, a preparation method and a use method thereof. Background technique [0002] The junction of the Loess Plateau and the Mu Us Desert is highly rich in mineral resources, water resources are scarce, the ecology is extremely fragile, and the soil is extremely desertified by wind erosion. In recent years, with the mining and smelting of coal, oil, natural gas and other resources, a large amount of heavy metals have been discharged into the environment along with waste liquid and waste. The direct discharge of waste liquid and the accumulation of waste have caused extremely serious heavy metal pollution in the soil. According to the survey, the heavy metal (such as cadmium, lead, arsenic, etc.) content in vegetables near the mining area is far beyond the normal level, which seriously threatens human health. It is urgent to strengthen the research on soil restora...

Claims

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Application Information

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IPC IPC(8): C09K17/40A01G22/00A01G24/10A01G24/30C09K105/00
CPCA01G22/00A01G24/10A01G24/30C09K17/40C09K2105/00
Inventor 相玉琳相玉秀焦玉荣曹保卫王琦刘永春吴琪
Owner YULIN UNIV
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