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 r

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0017] Example 1

[0018] First, weigh 120g sepiolite, crush and sieving to obtain 20 mesh particles, mix the sepiolite particles with 25% hydrochloric acid at a solid-to-liquid ratio of 1:5, soak at room temperature for 5 hours, and filter to obtain a filter residue, and use it Rinse the filter residue with ionized water until the washing liquid is neutral. Put the rinsed filter residue into an oven and dry it at 80°C for 6 hours to obtain acid-modified sepiolite, which is used for later use; then 150g of fresh banana peels are weighed, and the surface is cleaned. Put the banana peel into a vacuum drying oven at 70°C for 10 hours. The dried banana peel is crushed and sieved to obtain 30 mesh particles. The banana peel particles are immersed in a 3% sodium hydroxide solution with a solid-liquid ratio 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 became neutra...

Example Embodiment

[0020] Example 2

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

Example Embodiment

[0023] Example 3

[0024] First, weigh 150g sepiolite, crush and sieving to obtain 30 mesh particles, mix the sepiolite particles with 25% hydrochloric acid at a solid-to-liquid ratio of 1:5, soak for 7 hours at room temperature, and filter to obtain a filter residue, and use it Rinse the filter residue with ionized water until the washing liquid is neutral. Put the rinsed filter residue into an oven and dry it at 95°C for 8 hours to obtain acid-modified sepiolite, which is ready for use. Then weigh 200g of fresh banana peel, clean the surface, and put it Put the banana peel into a vacuum drying oven at 80°C for 12 hours. After drying, the banana peel is crushed and sieved to obtain 40 mesh particles. The banana peel particles are immersed in a 3% sodium hydroxide solution with a solid-liquid ratio of 1:5. After immersing for 60 minutes, the filter residue is obtained by suction filtration. The filter residue is rinsed with deionized water until the washing liquid is neutral. Aft...

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PUM

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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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