Emulsified vegetable oil as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of underground water remediation, and particularly relates to emulsified vegetable oil as well as a preparation method and application thereof. The emulsified vegetable oil is prepared from the following components in percentage by weight: 45 to 75 percent of edible vegetable oil, 2 to 12 percent of a surfactant and 20 to 45 percent of water and is alsoprepared from an optional common substrate and / or a pH (Potential of Hydrogen) regulator. The preparation method of the emulsified vegetable oil comprises the following steps of: mixing and dissolving of a soluble substrate, mixing and stirring of oil and water, and the like. An application method of the emulsified vegetable oil comprises the following steps of: injection well building, emulsified oil working solution preparation, indigenous microorganism activity evaluation, emulsified oil working solution injection and the like, thus realizing standardized remediation of chlorinated organicmatter polluted underground water. After the emulsified vegetable oil prepared by the invention is injected, the effect can be quickly obtained and is stable and lasting, and the emulsified vegetableoil can continuously take effect within 3 to 5 years after injecting once and requires no continuous addition for a long term; the technology is reasonable, raw materials are easy to obtain, the costis low, popularization and implementation are easy, and the environmental benefit, the economic benefit and the social benefit are good.

Description

technical field

[0001] The invention relates to the technical field of groundwater remediation, in particular to an emulsified vegetable oil and its preparation method and application. Background technique

[0002] Chlorinated organic compounds are widely used in industrial and agricultural fields, such as cleaning and degreasing of aircraft, engines, automobiles, electronic components and clothing in military and commercial fields, and were once used as organochlorine pesticides in agriculture. With the widespread use of chlorinated organic substances, more and more of these substances enter the soil and groundwater along with industrial wastewater and waste residues. Chlorinated organic compounds are mostly highly toxic and carcinogenic, posing a serious threat to human health and the ecological environment. Due to their physical and chemical properties, most chlorinated organics are very stable in the environment and take a long time to naturally degrade. At present, gr...

Examples

preparation example Construction

[0095] The preparation method of emulsified vegetable oil as above, comprises the steps:

[0096] (a) Surfactant, common substrate, pH adjusting agent are mixed with water;

[0097] (b) mixing and stirring the soluble substrate mixed and dissolved in step (a) with edible vegetable oil to obtain emulsified vegetable oil;

[0098] Preferably, the diameter of the oil droplets in the emulsified vegetable oil is 0.1-3 μm;

[0099]The diameter of the oil droplets in the emulsified vegetable oil is typically but not limited to, for example, 0.1 μm, 0.5 μm, 1 μm, 1.5 μm, 2 μm, 2.5 μm or 3 μm.

[0100] During the preparation of emulsified vegetable oil, the key purpose is to produce stable, non-agglomerated, sufficiently small and uniform emulsified oil droplets to form a stable oil-in-water emulsified oil preparation. The diameter of oil droplets in ideal emulsified vegetable oil should reach 0.1-3μm. The preparation of emulsion is a very mature technology in the food industry, whi...

Embodiment 1

[0128] In the former site of a chemical factory, the excessive groundwater pollutants are trichloroethane and trichloroethylene, and the target treatment area volume is 2400m 3 , the effective porosity is 0.25, the highest pollution concentration is trichloroethane 19mg / L, trichloroethylene 0.3mg / L, using this process for groundwater remediation, the specific implementation is as follows:

[0129] The emulsified vegetable oil prepared for repairing the polluted groundwater of the site is composed of the following active ingredients according to the weight ratio: soybean oil 60%, Tween 85 3%, sodium lactate 0.4%, yeast extract powder 0.12%, vitamin B-12 0.035%, Magnesium Hydroxide 0.1% and Water 36.345%.

[0130] Such as figure 1 Shown, described emulsified vegetable oil preparation method, comprises the steps:

[0131] (1) Add the above-mentioned Tween 85, sodium lactate, yeast extract powder, vitamin B-12 and magnesium hydroxide into the above-mentioned water, fully mix and...

Embodiment 2

[0142] In the former site of a chemical factory, the groundwater pollutant is cis-dichloroethylene, and the target treatment area volume is 13000m 3, the effective porosity is 0.22, and the highest pollution concentration is 15mg / L. This process is used for groundwater remediation. The specific implementation is as follows:

[0143] Prepare the emulsified vegetable oil used to restore the polluted groundwater of the site, which consists of the following active ingredients according to the weight ratio: soybean oil 40%, rapeseed oil 30%, Tween 60 4%, glycerol monooleate 4%, sodium bicarbonate 0.2% and water 21.8%.

[0144] The method for preparing emulsified vegetable oil comprises the steps of:

[0145] (1) Add the above-mentioned Tween 60, glycerol monooleate and sodium bicarbonate into the above-mentioned water, fully mix and dissolve;

[0146] (2) Mix the soluble substrate mixed and dissolved in step (1) with the above soybean oil and rapeseed oil, and mix once with a sta...

technical field

[0001] The invention relates to the technical field of groundwater remediation, in particular to an emulsified vegetable oil and its preparation method and application. Background technique

[0002] Chlorinated organic compounds are widely used in industrial and agricultural fields, such as cleaning and degreasing of aircraft, engines, automobiles, electronic components and clothing in military and commercial fields, and were once used as organochlorine pesticides in agriculture. With the widespread use of chlorinated organic substances, more and more of these substances enter the soil and groundwater along with industrial wastewater and waste residues. Chlorinated organic compounds are mostly highly toxic and carcinogenic, posing a serious threat to human health and the ecological environment. Due to their physical and chemical properties, most chlorinated organics are very stable in the environment and take a long time to naturally degrade. At present, gr...

Examples

preparation example Construction

[0095] The preparation method of emulsified vegetable oil as above, comprises the steps:

[0096] (a) Surfactant, common substrate, pH adjusting agent are mixed with water;

[0097] (b) mixing and stirring the soluble substrate mixed and dissolved in step (a) with edible vegetable oil to obtain emulsified vegetable oil;

[0098] Preferably, the diameter of the oil droplets in the emulsified vegetable oil is 0.1-3 μm;

[0099]The diameter of the oil droplets in the emulsified vegetable oil is typically but not limited to, for example, 0.1 μm, 0.5 μm, 1 μm, 1.5 μm, 2 μm, 2.5 μm or 3 μm.

[0100] During the preparation of emulsified vegetable oil, the key purpose is to produce stable, non-agglomerated, sufficiently small and uniform emulsified oil droplets to form a stable oil-in-water emulsified oil preparation. The diameter of oil droplets in ideal emulsified vegetable oil should reach 0.1-3μm. The preparation of emulsion is a very mature technology in the food industry, whi...

Embodiment 1

[0128] In the former site of a chemical factory, the excessive groundwater pollutants are trichloroethane and trichloroethylene, and the target treatment area volume is 2400m 3 , the effective porosity is 0.25, the highest pollution concentration is trichloroethane 19mg / L, trichloroethylene 0.3mg / L, using this process for groundwater remediation, the specific implementation is as follows:

[0129] The emulsified vegetable oil prepared for repairing the polluted groundwater of the site is composed of the following active ingredients according to the weight ratio: soybean oil 60%, Tween 85 3%, sodium lactate 0.4%, yeast extract powder 0.12%, vitamin B-12 0.035%, Magnesium Hydroxide 0.1% and Water 36.345%.

[0130] Such as figure 1 Shown, described emulsified vegetable oil preparation method, comprises the steps:

[0131] (1) Add the above-mentioned Tween 85, sodium lactate, yeast extract powder, vitamin B-12 and magnesium hydroxide into the above-mentioned water, fully mix and...

Embodiment 2

[0142] In the former site of a chemical factory, the groundwater pollutant is cis-dichloroethylene, and the target treatment area volume is 13000m 3, the effective porosity is 0.22, and the highest pollution concentration is 15mg / L. This process is used for groundwater remediation. The specific implementation is as follows:

[0143] Prepare the emulsified vegetable oil used to restore the polluted groundwater of the site, which consists of the following active ingredients according to the weight ratio: soybean oil 40%, rapeseed oil 30%, Tween 60 4%, glycerol monooleate 4%, sodium bicarbonate 0.2% and water 21.8%.

[0144] The method for preparing emulsified vegetable oil comprises the steps of:

[0145] (1) Add the above-mentioned Tween 60, glycerol monooleate and sodium bicarbonate into the above-mentioned water, fully mix and dissolve;

[0146] (2) Mix the soluble substrate mixed and dissolved in step (1) with the above soybean oil and rapeseed oil, and mix once with a sta...

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