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A kind of soil remediation agent and preparation method thereof

A technology of soil remediation agent and benzene ring, which is applied in the field of full-function soil remediation agent, can solve the problems of high cost and low efficiency of soil remediation, and achieve the effects of easy preparation, simple and cheap preparation process, low preparation cost and use cost

Active Publication Date: 2017-09-19
NINGBO YUCHEN ENVIROCLEAN TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The invention provides a soil remediation agent and a preparation method thereof to solve the technical problems of low efficiency and high cost of remediating soil by existing biological, chemical and physical methods

Method used

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  • A kind of soil remediation agent and preparation method thereof
  • A kind of soil remediation agent and preparation method thereof
  • A kind of soil remediation agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Preparation of catalyst

[0063] In a 1-liter autoclave with stirring function, add 735ml of water, 112g (dry weight) of pine sawdust (content: 43% lignin, 53% cellulose and hemicellulose, 4% other components ), 32g quicklime, 1.0g of anthraquinone. After the reactor is sealed, replace it with nitrogen for 3 times, then add nitrogen, and maintain a certain positive pressure of nitrogen in the reactor to prevent air from entering. Under stirring, heat to 250°C and keep stirring at this temperature for 50-60 minutes. After cooling to below 90°C, slowly release the pressure, then keep the temperature greater than 60°C, press filter to obtain 73 grams of a solid product with a moisture content of 26%.

[0064] Vacuum drying until the water content is lower than 1%, the off-white solid product obtained is a catalyst for the hydrolysis reaction of crop stalks, and is stored under nitrogen protection for future use.

Embodiment 2

[0066] Preparation of a new high-efficiency full-function soil remediation agent

[0067] In a 1-liter high-pressure reactor with stirring function, add 725ml of water, 120g (dry weight) of wheat straw powder (2mm particle size, 40% cellulose, 26% hemicellulose, 22% lignin , other components of 12%), the quicklime of 42g, the catalyst that the embodiment 1 preparation of 6g. After the reactor is sealed, replace it with nitrogen for 3 times, then add nitrogen, and keep a certain positive pressure of nitrogen in the kettle to prevent air from entering. Under stirring, heat to 235° C., and stir the reaction at this temperature for 70-80 minutes. After cooling to below 90°C, slowly release the pressure, then keep the temperature above 50°C, press filter to obtain 50 grams of solid product with a moisture content of 28%.

[0068] Vacuum-dried at a temperature between about 50-60°C, then pulverized into powder, passed through an 80-mesh sieve, and sealed in a glass bottle for late...

Embodiment 3

[0071] A new high-efficiency full-featured soil remediation agent has the ability to extract heavy metals from soil

[0072] This experiment adopts the comparative method, and the comparative extractant is sodium citrate and pure water. The polluted soil of 10 grams in the open container is respectively placed in the pure water of 250ml, 5% weight of 250ml, the soil remediation agent solution of the present invention of the 5% weight / volume ratio of the citric acid solution of volume ratio, 250ml, mechanical stirring 48 hour, centrifuged, and the extracted soil aqua regia was dissolved to measure the heavy metal content therein, and then the extracted rate (%) of the heavy metal from the soil was calculated.

[0073] The data in the following table is the extraction rate (removal rate) of heavy metals, and each data is the average value of at least three test data:

[0074] Pollutants

[0075] The results show that the new high-efficiency full-function soil remediat...

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Abstract

A high-efficiency and fully functional soil remediation agent. The soil remediation agent is a mixture of calcium salts of multiple phenolic compounds. The high-efficiency and fully functional soil remediation agent removes organic pollutants via chemical bonding to enable the pollutants to be degraded by micro-organisms and to increase organic matter in the soil. The soil remediation agent can greatly accelerate the rate of polycyclic aromatic hydrocarbon degradation in the soil by the micro-organisms. A preparation process of the high-efficiency and fully functional soil remediation agent is simple, waste crop stalks served as raw materials are inexpensive and easy to obtain, and the preparation process is a simple catalytic dehydration reaction. The production cost and the application cost of the high-efficiency and fully functional soil remediation agent are significantly reduced, the use is convenient, and the market application prospect is broad.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and specifically relates to a full-function soil remediation agent, which can effectively remove various organic pollutants in the soil without damaging the organic matter in the soil, and remove heavy metals in the soil at the same time. It can treat soil acidification, increase effective organic matter in soil, and effectively promote the biodegradation of polycyclic aromatic hydrocarbons in soil. Background technique [0002] At present, due to the development of industry and transportation, such as the development of shale oil and gas, the exploitation and utilization of oil and coal, and the construction and production of various chemical plants, soil pollution plagues developed countries and rapidly developing developing countries and regions. Soil remediation becomes a challenge that must be addressed in these regions. For countries with advanced environmental protection,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/08C09K17/40
CPCB09C1/08C09K17/40
Inventor 朱作霖
Owner NINGBO YUCHEN ENVIROCLEAN TECH
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