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Preparation method of soil stabilizer for remediation of heavy metal contamination

A technology of polluting soil and curing agent, applied in chemical instruments and methods, soil conditioning materials, applications, etc., can solve the problems of narrow application range, single function, and few categories of soil curing agent, so as to reduce soil erosion and promote plant growth. Effect

Inactive Publication Date: 2016-11-23
雷春生
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention: aiming at the problem that existing soil stabilizer products have fewer categories and single functions, and only have the effect of solidifying soil, resulting in a narrow application range of soil stabilizer, a kind of soil stabilizer for repairing heavy metals is provided. The preparation method of the polluted soil solidifying agent comprises the following steps: pulverizing and sieving the sepiolite, mixing it with hydrochloric acid and soaking it, then washing the filter residue with deionized water until the washing solution is neutral, putting the filter residue into an oven to dry to prepare the acid modified Sepiolite, then the banana peel is made into granules and soaked in sodium hydroxide solution, the filter residue obtained after soaking is rinsed and dried in an oven, and then roasted in a muffle furnace to obtain activated carbon from banana peels, and then the acid is modified Sepiolite, banana peel activated carbon, red mud, hydroxyapatite, aluminum oxide powder and cow dung, stir and mix evenly to make a mixture, and finally mix the mixture, perlite powder, sodium carbonate, zeolite, sodium alginate, Sodium methyl siliconate, hydroxybenzenesulfonic acid, and sodium dodecylbenzenesulfonate are put into a dispersing kettle and mixed to obtain a soil curing agent. The repairing heavy metal polluted soil curing agent prepared by the present invention has a good effect on soil Heavy metals have strong adsorption capacity, and can repair and solidify the soil, so they have broad market prospects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] First take 120g of sepiolite, pulverize and sieve to obtain 20 mesh particles, mix the sepiolite particles with 25% mass fraction hydrochloric acid according to the solid-to-liquid ratio of 1:5, soak at room temperature for 5h, filter to obtain filter residue, and use Rinse the filter residue with ionized water until the washing solution is neutral, put the washed filter residue in an oven, and dry at 80°C for 6 hours to obtain acid-modified sepiolite, which will be used for later use; then weigh 150g of fresh banana peel, clean the surface and put Put it into a vacuum drying oven at 70°C for 10 hours, crush the dried banana peel and sieve to obtain 30-mesh particles, soak the banana peel particles in a 3% sodium hydroxide solution with a mass fraction of 1:5, After soaking for 50 minutes, the filter residue was obtained by suction filtration. The filter residue was rinsed with deionized water until the washing liquid was neutral. After rinsing, it was placed in an oven ...

example 2

[0021] First, take 135g of sepiolite, pulverize and sieve to obtain 25 mesh particles, mix the sepiolite particles with 25% mass fraction of hydrochloric acid at a solid-to-liquid ratio of 1:5, soak at room temperature for 6 hours, filter to obtain a filter residue, and use Rinse the filter residue with ionized water until the washing solution is neutral, put the washed filter residue in an oven, and dry at 88°C for 7 hours to obtain acid-modified sepiolite, which is then used for later use; then weigh 175g of fresh banana peel, clean the surface and put Put it into a vacuum drying oven at 75°C for 11 hours, crush the dried banana peel and sieve to obtain 35 mesh particles, soak the banana peel particles in a 3% sodium hydroxide solution with a mass fraction of 1:5, After soaking for 55 minutes, the filter residue was obtained by suction filtration. The filter residue was rinsed with deionized water until the washing liquid was neutral. After rinsing, it was placed in an oven a...

example 3

[0024] First take 150g sepiolite, pulverize and sieve to obtain 30 mesh particles, mix the sepiolite particles with 25% hydrochloric acid with a solid-to-liquid ratio of 1:5, soak at room temperature for 7 hours, filter to obtain a filter residue, and use Rinse the filter residue with ionized water until the washing solution is neutral, put the washed filter residue in an oven, and dry at 95°C for 8 hours to obtain acid-modified sepiolite for later use; then weigh 200g of fresh banana peel, clean the surface and put Put it into a vacuum drying oven at 80°C for 12 hours, crush the dried banana peel and sieve to obtain 40-mesh particles, soak the banana peel particles in a 3% sodium hydroxide solution with a mass fraction of 1:5, After soaking for 60 minutes, the filter residue was obtained by suction filtration, and the filter residue was rinsed with deionized water until the washing liquid was neutral. After rinsing, it was placed in an oven and dried at 105°C for 8 hours. The ...

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Abstract

The invention discloses a preparation method of a soil stabilizer for remediation of heavy metal contamination, and belongs to the technical field of preparation of soil stabilizers. The preparation method includes: grinding and sieving sepiolite prior to being mixed with and soaked in hydrochloric acid, then drying flushed filter residue to prepare acid-modified sepiolite, then preparing banana skin into granules prior to soaking in sodium hydroxide solution, flushing and drying filter residue soaked and filtered, then roasting obtained banana skin activated carbon with a muffle furnace, and putting a mixture prepared by stirring acid-modified sepiolite, banana skin activated carbon, red mud, hydroxyapatite, aluminium oxide powder and cow dung together with perlite powder, sodium carbonate, zeolite, sodium alginate, sodium methylsiliconate, hydroxy-benzenesulfonic acid and sodium dodecyl benzene sulfonate into a dispersion kettle for mixing to obtain the soil stabilizer. The soil stabilizer has strong adsorption capacity in heavy metals in soil, has repairing and solidification effect in soil, and has broad market prospect.

Description

technical field [0001] The invention discloses a preparation method of a solidifying agent for repairing heavy metal polluted soil, and belongs to the technical field of soil stabilizing agent preparation. Background technique [0002] Soil stabilizer is a new type of energy-saving and environmental protection engineering material synthesized from various inorganic and organic materials for curing various soils. After it is mixed with the soil, it changes the engineering properties of the soil through a series of physical and chemical reactions. It can fix a large amount of free water in the soil in the form of crystal water, which reduces the surface current of the soil micelles, and the electric double layer adsorbed by the micelles Thinning, electrolyte concentration increases, particles tend to coagulate, volume expansion further fills soil pores, and under the action of compaction work, the solidified soil is easy to compact and stabilize, thereby forming an overall str...

Claims

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Application Information

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IPC IPC(8): C09K17/40B01J20/22B01J20/30C09K101/00C09K103/00
CPCC09K17/40B01J20/22B01J20/3042C09K2101/00C09K2103/00
Inventor 雷春生薛蕾王统军
Owner 雷春生
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