CN111215000B - Surfactants for non-aqueous phase contaminant treatment in soil and groundwater - Google Patents

Surfactants for non-aqueous phase contaminant treatment in soil and groundwater Download PDF

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CN111215000B
CN111215000B CN202010041526.XA CN202010041526A CN111215000B CN 111215000 B CN111215000 B CN 111215000B CN 202010041526 A CN202010041526 A CN 202010041526A CN 111215000 B CN111215000 B CN 111215000B
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aqueous phase
soil
fatty acid
surfactant
underground water
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CN111215000A (en
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李铁
林晓兰
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Yaoang Environmental Technology Jiangsu Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K23/00—Use of substances as emulsifying, wetting, dispersing, or foam-producing agents
    • C09K23/017—Mixtures of compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/68—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K23/00—Use of substances as emulsifying, wetting, dispersing, or foam-producing agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/06—Contaminated groundwater or leachate

Abstract

The invention relates to a surfactant for treating non-aqueous phase pollutants in soil and underground water, which comprises the following components in percentage by weight: 5-12% of polyglycerol fatty acid ester; 15-30% of ethoxylated castor oil; 15-25% of PEG-2 cocamide; 8-15% of alkane sulfonate; 10-30% of ethoxylated fatty acid; 8-15% of alkylphenol ethoxylate; 5-10% of betaine. The surfactant for treating the non-aqueous phase pollutants in the soil and the underground water adopts a formula formed by a plurality of surfactants according to a certain component proportion, can obviously enhance the solubility of various non-aqueous phase pollutants in the underground water, can transfer the non-aqueous phase pollutants in the water to an extraction well through subsequent multiphase extraction, is convenient for subsequent oxidation treatment, ensures higher purification efficiency of the underground water, greatly reduces used oxidants, and saves the repair cost.

Description

Surfactants for non-aqueous phase contaminant treatment in soil and groundwater
Technical Field
The invention relates to the field of soil and underground water remediation, in particular to a surfactant for treating non-aqueous phase pollutants in soil and underground water.
Background
In the field of environmental engineering for remediation of soil groundwater, in many contaminated sites, soil groundwater contamination is complicated by the presence of non-aqueous phase contaminants. In the prior art, under certain site conditions, petroleum pollutants, polycyclic aromatic hydrocarbon pollutants, chlorinated organic pollutants and the like can be treated in an in-situ chemical oxidation mode, but due to the existence of non-aqueous phase pollutants, the in-situ chemical oxidation has the following problems: the required chemical oxidant addition is too high, making the in situ chemical oxidation process uneconomical; the chemical oxidation only aims at the pollutants dissolved in the water phase, has higher efficiency and has no obvious effect on the pollutants in the non-water phase; multiphase extraction can be used to extract non-aqueous phase materials from soil groundwater, but because of adsorption of non-aqueous phase materials in soil particles such as smear zone, mobility is poor and the rate of flow into extraction wells is limited, affecting the effectiveness of multiphase extraction to remove non-aqueous phase.
The prior art discloses a method for repairing organic matters in soil by using a solubilizer and an oxidant in a matching way. For example, patent document CN106269823A discloses a method for remediating high concentration organic contaminated soil, in which the solubilizing agent used is an anionic surfactant, a cationic surfactant or a zwitterionic surfactant or a nonionic surfactant or a biosurfactant. And specifically discloses anionic surfactants including stearic acid and sodium dodecyl benzene sulfonate, cationic surfactants including benzalkonium chloride and benzalkonium bromide, zwitterionic surfactants including lecithin, amino acid surfactants and betaine surfactants, nonionic surfactants including fatty glyceride, sorbitan fatty acid ester and polysorbate, and biosurfactants including rhamnolipid, saponin and alkyl polyglycoside. These surfactants have a certain effect on treating organic pollutants in soil, but the remediation effect is not ideal for treating non-aqueous phase pollutants in groundwater, and therefore, it is necessary to develop new surfactants to improve the remediation effect on non-aqueous phase pollutants in groundwater.
Disclosure of Invention
The invention aims to provide a surfactant for treating non-aqueous phase pollutants in soil and underground water, aiming at the problem of poor repairing effect on the non-aqueous phase pollutants in the underground water in the background technology.
In order to achieve the purpose, the invention is realized by the following technical scheme: a surfactant for treating non-aqueous phase pollutants in soil and groundwater comprises the following components in percentage by weight: 5-12% of polyglycerol fatty acid ester; 15-30% of ethoxylated castor oil; 15-25% of PEG-2 cocamide; 8-15% of alkane sulfonate; 10-30% of ethoxylated fatty acid; 8-15% of alkylphenol ethoxylate; 5-10% of betaine.
The further scheme is that the composite material comprises the following components in percentage by weight: 8-10% of polyglycerol fatty acid ester; 15-27% of ethoxylated castor oil; 18-20% of PEG-2 cocoamide; 10-13% of alkane sulfonate; 15-25% of ethoxylated fatty acid; 10-13% of alkylphenol ethoxylate; 5-8% of betaine.
In a further scheme, the feed additive also comprises 15-20% of limonene in percentage by weight.
The further proposal is that the paint also comprises 10 to 15 weight percent of fatty alcohol-polyoxyethylene ether.
The invention has the positive effects that: the surfactant for treating the non-aqueous phase pollutants in the soil and the underground water adopts a formula formed by a plurality of surfactants according to a certain component proportion, can obviously enhance the solubility of various non-aqueous phase pollutants in the underground water, can transfer the non-aqueous phase pollutants in the water to an extraction well through subsequent multiphase extraction, is convenient for subsequent oxidation treatment, ensures higher purification efficiency of the underground water, greatly reduces used oxidants, and saves the repair cost.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The surfactant for treating the non-aqueous phase pollutants in soil and underground water comprises the following components in percentage by weight: 5% of polyglycerol fatty acid ester; 30% of ethoxylated castor oil; 15% of PEG-2 cocamide; alkane sulfonate 15%; ethoxylated fatty acid 20%; 10% of alkylphenol ethoxylate; and 5% of betaine.
Example 2
The surfactant for treating the non-aqueous phase pollutants in soil and underground water comprises the following components in percentage by weight: 12% of polyglycerol fatty acid ester; 15% of ethoxylated castor oil; 25% of PEG-2 cocamide; alkane sulfonate 8%; ethoxylated fatty acid 15%; 15% of alkylphenol ethoxylate; 10% of betaine.
Example 3
The surfactant for treating the non-aqueous phase pollutants in soil and underground water comprises the following components in percentage by weight: 12% of polyglycerol fatty acid ester; 15% of ethoxylated castor oil; 25% of PEG-2 cocamide; alkane sulfonate 15%; ethoxylated fatty acid 15%; alkylphenol ethoxylate 8%; 10% of betaine.
Example 4
The surfactant for treating the non-aqueous phase pollutants in soil and underground water comprises the following components in percentage by weight: 10% of polyglycerol fatty acid ester; 15% of ethoxylated castor oil; 20% of PEG-2 cocamide; alkane sulfonate 10%; 30% of ethoxylated fatty acid; 10% of alkylphenol ethoxylate; and 5% of betaine.
Example 5
The surfactant for treating the non-aqueous phase pollutants in soil and underground water comprises the following components in percentage by weight: 10% of polyglycerol fatty acid ester; 15% of ethoxylated castor oil; 15% of PEG-2 cocamide; alkane sulfonate 10%; ethoxylated fatty acid 20%; 10% of alkylphenol ethoxylate; 5% of betaine; and 15% of limonene.
Example 6
The surfactant for treating the non-aqueous phase pollutants in soil and underground water comprises the following components in percentage by weight: 5% of polyglycerol fatty acid ester; 20% of ethoxylated castor oil; 15% of PEG-2 cocamide; alkane sulfonate 10%; ethoxylated fatty acid 15%; 10% of alkylphenol ethoxylate; 5% of betaine; and 20% of limonene.
Example 7
The surfactant for treating the non-aqueous phase pollutants in soil and underground water comprises the following components in percentage by weight: 5% of polyglycerol fatty acid ester; 20% of ethoxylated castor oil; 15% of PEG-2 cocamide; alkane sulfonate 12%; ethoxylated fatty acid 15%; alkylphenol ethoxylate 13%; 5% of betaine; and 15% of limonene.
Example 8
The surfactant for treating the non-aqueous phase pollutants in soil and underground water comprises the following components in percentage by weight: 5% of polyglycerol fatty acid ester; ethoxylated castor oil 27%; 15% of PEG-2 cocamide; alkane sulfonate 13%; ethoxylated fatty acid 15%; 10% of alkylphenol ethoxylate; 5% of betaine; 10 percent of fatty alcohol-polyoxyethylene ether.
Example 9
The surfactant for treating the non-aqueous phase pollutants in soil and underground water comprises the following components in percentage by weight: 5% of polyglycerol fatty acid ester; 20% of ethoxylated castor oil; 20% of PEG-2 cocamide; alkane sulfonate 10%; ethoxylated fatty acid 15%; 10% of alkylphenol ethoxylate; 5% of betaine; 15% of fatty alcohol-polyoxyethylene ether.
Example 10
The surfactant for treating the non-aqueous phase pollutants in soil and underground water comprises the following components in percentage by weight: 5% of polyglycerol fatty acid ester; 15% of ethoxylated castor oil; 15% of PEG-2 cocamide; alkane sulfonate 10%; ethoxylated fatty acid 15%; 10% of alkylphenol ethoxylate; 5% of betaine; 15% of limonene; 10 percent of fatty alcohol-polyoxyethylene ether.
Example 11
The surfactant for treating the non-aqueous phase pollutants in soil and underground water comprises the following components in percentage by weight: 5% of polyglycerol fatty acid ester; 15% of ethoxylated castor oil; 15% of PEG-2 cocamide; alkane sulfonate 10%; 10% of ethoxylated fatty acid; 10% of alkylphenol ethoxylate; 5% of betaine; 15% of limonene; 15% of fatty alcohol-polyoxyethylene ether.
The surfactants of examples 1-11 are effective in removing non-aqueous contaminants from soil and groundwater
Figure BDA0002367925240000041
Figure BDA0002367925240000051
According to the scheme of the embodiments 1-11 of the invention, an optimized formula formed by a plurality of surfactants according to a certain component proportion is adopted, experiments show that the solubility of various non-aqueous phase pollutants in underground water can be obviously enhanced, the non-aqueous phase pollutants in the water can be transferred to an extraction well through subsequent multiphase extraction, the subsequent oxidation treatment is facilitated, the purification efficiency of the underground water is higher, the used oxidant is greatly reduced, and the repair cost is saved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (4)

1. A surfactant for use in the treatment of non-aqueous phase contaminants in soil and groundwater, characterized by: the paint comprises the following components in percentage by weight:
5-12% of polyglycerol fatty acid ester;
15-30% of ethoxylated castor oil;
15-25% of PEG-2 cocamide;
8-15% of alkane sulfonate;
10-30% of ethoxylated fatty acid;
8-15% of alkylphenol ethoxylate;
5-10% of betaine.
2. The surfactant for non-aqueous phase contaminant treatment in soil and groundwater according to claim 1, wherein: the components and weight percentage are as follows:
8-10% of polyglycerol fatty acid ester;
15-27% of ethoxylated castor oil;
18-20% of PEG-2 cocoamide;
10-13% of alkane sulfonate;
15-25% of ethoxylated fatty acid;
10-13% of alkylphenol ethoxylate;
5-8% of betaine.
3. The surfactant for non-aqueous phase contaminant treatment in soil and groundwater according to claim 1 or 2, wherein: also comprises 15-20% of limonene by weight percentage.
4. The surfactant for non-aqueous phase contaminant treatment in soil and groundwater according to claim 1 or 2, wherein: also comprises 10-15 percent of fatty alcohol-polyoxyethylene ether by weight percentage.
CN202010041526.XA 2020-01-15 2020-01-15 Surfactants for non-aqueous phase contaminant treatment in soil and groundwater Active CN111215000B (en)

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