Fluorine-polluted soil remediation agent and laboratory application method

A technology for repairing medicaments and polluted soil, which is applied in the field of fluorine-contaminated soil treatment. It can solve the problems of reducing fluorine leaching ability, unstable carbon adsorption, and low modification efficiency, and achieve good curing effect, reducing leaching ability and improving utilization rate. Effect

Pending Publication Date: 2021-06-25
中铝环保生态技术(湖南)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the present invention overcomes the disadvantages of direct carbon modification in the prior art, such as increased process and material costs, low modification efficiency, and unstable carbon adsorption, which is beneficial to improving the utilization rate of raw materials, reducing production costs, and reducing the leaching of fluorine capacity, the purpose of the present invention is to provide a fluorine-contaminated soil remediation agent and laboratory application method, the remediation agent contains modified red mud 40-80wt%, CaCl 2 10-30 wt%, Phosphorus 10-30 wt%

Method used

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  • Fluorine-polluted soil remediation agent and laboratory application method
  • Fluorine-polluted soil remediation agent and laboratory application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Red mud modification: take 100g of air-dried red mud, add 500ml of phosphoric acid (phosphoric acid concentration is 10mol / L), stir and react with a magnetic stirrer for 24 hours, filter, dry the filter residue to constant weight, and set aside.

[0015] Formula 1: Take 12g of the above-mentioned modified red mud, 9g each of CaCl2 and Na3PO4, put them into a planetary ball mill and grind for 0.5h, pass the ball milled product through a 100-mesh sieve, and the product under the sieve is the formula 1 drug.

[0016] Formula 2: Take 18g of the above-mentioned modified red mud, 6g of CaCl2 and 6g of Na3PO4 each, put into a planetary ball mill and grind for 0.5h, pass the ball milled product through a 100-mesh sieve, and the product under the sieve is the formulation 2 drug.

[0017] Formula 3: Take 24g of the above-mentioned modified red mud, 3g each of CaCl2 and Na3PO4, put them into a planetary ball mill and mill for 0.5h, and pass the milled product through a 100-mesh sie...

Embodiment 2

[0022] Utilize the medicament of formula 1 among the embodiment 1 to test the fluorine-contaminated soil in various degrees, specifically as follows:

[0023] Red mud modification: take 100g of air-dried red mud, add 500ml of phosphoric acid (phosphoric acid concentration is 10mol / L), stir and react with a magnetic stirrer for 24 hours, filter, dry the filter residue to constant weight, and set aside.

[0024] Take 12g of the above-mentioned modified red mud, take 9g each of CaCl2 and Na3PO4, put them into a planetary ball mill and grind them for 0.5h, pass the ball milled product through a 100-mesh sieve, and the product under the sieve is the formula 1 drug.

[0025] The application method of the medicament laboratory in this example is: take 200g of air-dried and sieved fluorine-contaminated soil with different degrees and put it in a 1L beaker, add the medicament of formula 1 in Example 1 to the contaminated soil and stir evenly, and then spray an appropriate amount Stir w...

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Abstract

The invention discloses a fluorine-polluted soil remediation agent and a laboratory application method, wherein the fluorine-polluted soil remediation agent comprises 40-80 wt% of modified red mud, 10-30 wt% of CaCl2 and 10-30 wt% of a phosphorus-based substance; CaCl2 and the phosphorus-based substance are added into the modified red mud, ball milling is performed for 0.5 h in a planetary ball mill, a ball milling product is sieved by a 100-mesh sieve, and undersize is a remediation agent. According to the method, the high-purity and high-stability fluorine-polluted soil remediation agent is prepared through a simple process, so that the use dosage cost of relative fluorine equivalent is reduced, meanwhile, the curing effect on fluorine is better, the utilization rate of raw materials is increased, the production cost is reduced, and the leaching capacity on fluorine is reduced.

Description

technical field [0001] The invention belongs to the technical field of fluorine-contaminated soil treatment, and in particular relates to a fluorine-contaminated soil remediation agent and a laboratory application method. Background technique [0002] For a long time, my country's electrolytic aluminum industry, phosphorus chemical industry, fluorine chemical industry, pesticide chemical industry, etc. have discharged a large amount of fluoride in the production process, resulting in a large amount of land with serious fluorine pollution. Due to the fluorine (HF, NaF, SiF4) are easily soluble in water, so if the land with serious fluorine pollution is not treated in time, it will permeate and pollute the groundwater source. Fluorine is an accumulative poison. Plant leaves and pastures can absorb fluorine. After cattle and sheep eat this polluted forage, it will cause joint swelling, osteoporosis, and even paralysis. Excessive intake of fluoride by humans will interfere with t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08B09C1/02C09K17/40
CPCB09C1/08B09C1/02C09K17/40
Inventor 王密罗程彭川周学锋秦华曹楚彦汤慧
Owner 中铝环保生态技术(湖南)有限公司
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