Preparation method of green functional clay repair material for combined pollution

A technology for composite pollution and repair materials, applied in the field of preparation of green functional clay repair materials, can solve the problems of high cost, inability to guarantee adsorption performance, etc., and achieve the effects of low cost, simple preparation method and environmental friendliness

Inactive Publication Date: 2020-12-18
SHANXI UNIV
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  • Abstract
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Problems solved by technology

[0004] The invention aims at the problems of environmental risk, high cost and unguaranteed adsorption performance caused by the use of existing surfactants in clay modification, and provides a preparation method of green functional clay repair materials for complex pollution

Method used

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  • Preparation method of green functional clay repair material for combined pollution

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preparation example Construction

[0024] A preparation method for a green functional clay restoration material for complex pollution, comprising the steps of:

[0025] The first step is to mix the clay minerals that have been purified by water and remove impurities with water in proportion, and stir evenly to obtain a suspension, then add an absolute ethanol solution containing soybean lecithin in proportion to obtain a mixed solution, and adjust the pH of the mixed solution It is acidic. After ultrasonication for 15 minutes, shake at a constant temperature of 40°C for 24 hours, centrifuge, wash and dry to obtain lecithin-modified clay;

[0026] The second step is to mix the lecithin modified clay with water in proportion, stir evenly to obtain a suspension, add an aqueous solution containing biochemical fulvic acid in proportion to obtain a mixed solution, shake at a constant temperature of 25°C for 24 hours, centrifuge and wash dried, ground and passed through a 200-mesh sieve to obtain lecithin-biochemical ...

Embodiment 1

[0028] Take 1 g of washed and purified sodium-based bentonite and add it to 80 mL of aqueous solution to make a suspension, add 20 mL of soybean lecithin anhydrous ethanol solution with a modification ratio of 0.5 (containing 0.3654 g of soybean lecithin), and use 0.1mol L -1 HNO 3 The solution adjusted the pH of the mixed solution to 2.29, then the mixed solution was ultrasonicated for 15 minutes, then oscillated on a constant temperature oscillator at 40°C and 180rpm for 24h, and then centrifuged, and the clay was washed with absolute ethanol and deionized water for 5 times in sequence, and finally vacuum-dried at 60°C for 12 hours To obtain lecithin-modified clay; then add the prepared lecithin-modified clay to 20mL aqueous solution to make a suspension, and then add 20mL biochemical fulvic acid aqueous solution with a modification ratio of 1.0 (containing 0.2973g biochemical fulvic acid) , the mixed solution was shaken on a constant temperature oscillator at 25°C and 180rp...

Embodiment 2

[0030]Take 1 g of washed and purified sodium-based bentonite and add it to 80 mL of aqueous solution to make a suspension, add 20 mL of soybean lecithin anhydrous ethanol solution with a modification ratio of 1.0 (containing 0.7308 g of soybean lecithin), and use 0.1mol L -1 HNO 3 The solution adjusted the pH of the mixed solution to 2.30, then the mixed solution was ultrasonicated for 15 minutes, then oscillated on a constant temperature oscillator at 40°C and 180rpm for 24h, and then centrifuged, and the clay was washed with absolute ethanol and deionized water for 5 times in sequence, and finally vacuum-dried at 60°C for 12 hours To obtain lecithin-modified clay; then add the prepared lecithin-modified clay to 20mL aqueous solution to make a suspension, add 20mL biochemical fulvic acid aqueous solution with a modification ratio of 0.5 (containing 0.1487g of biochemical fulvic acid), The mixture was oscillated on a constant temperature oscillator at 25°C and 180rpm for 24 ho...

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Abstract

The invention discloses a preparation method of a green functional clay repair material for combined pollution, belongs to the field of preparation of environmental protection materials, and can solvethe problems of environmental risk, high cost and incapability of guaranteeing adsorption performance caused by the fact that an existing surfactant is used for clay modification. According to the invention, ampholytic surfactant soybean lecithin and nonionic surfactant biochemical fulvic acid are selected as modifiers to modify the clay, so that the replacement of the traditional chemical synthetic surfactant is realized, and the compounding modification of the ampholytic surfactant soybean lecithin and the nonionic surfactant biochemical fulvic acid also improves the organic component content of the clay; and on the premise of keeping the adsorption performance of the amphoteric modifier to heavy metals, the modification of biochemical fulvic acid enhances the adsorption performance toorganic pollutants and heavy metals.

Description

technical field [0001] The invention belongs to the technical field of preparation of environmental protection materials, and in particular relates to a preparation method of a green functional clay restoration material for complex pollution. Background technique [0002] Clay minerals such as bentonite, attapulgite, and vermiculite are widely used in the adsorption of pollutants in water and soil and the degradation of bacterial agents due to their wide source, low cost, strong adsorption, high mechanical strength, and low environmental impact. However, the hydrophilicity of the clay surface limits its remediation effect on organic pollutants. Therefore, certain hydrophobic modification is required to improve the adsorption of hydrophobic organic pollutants and further strengthen its adsorption. The ability of heavy metals can reduce the toxicity of metals, alleviate the inhibitory effect of heavy metals on the biodegradation of organic pollutants, and then improve the reme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/30C02F3/34B09C1/10C02F101/30C02F101/20
CPCB01J20/12B01J20/3021B01J20/3085B09C1/10B09C2101/00C02F3/34C02F2101/20C02F2101/30C02F2305/06
Inventor 朱宇恩李华李凌志吕宸琛
Owner SHANXI UNIV
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