Compositions and methods for remediating pfas contaminants

Abstract

C4-C 12 The remediation solution for PFAS contaminants and C4-C12 PFAS contaminants is made from an aqueous solution comprising 4% of an IVEY surfactant mixture and 0.20 volume percent of ethanol. Ethanol is the reagent in the solution. The IVEY surfactant mixture has molecules with extendable hydrophilic portions. The remediation solution reduces the capillary effect of the soil, increasing the soil drainage. The remediation solution reduces water molecule aggregation and lowers the interfacial surface tension of water and PFAS contaminants. In decontamination of AFFF manufacturing equipment, the remediation solution and method described herein reduced contamination of twelve PFAS analytes by 99.99998%.

Description

[0001] This application claims the benefit of U.S. Provisional Application No. 63 / 534,880, filed on August 28, 2023. Technical Field

[0002] This invention relates to a composition for remediating PFOS, PFAS, and AFFF contaminants. More specifically, this invention relates to a composition for remediating PFAS contaminants in soil, bedrock, groundwater, and impermeable surfaces. Background Technology

[0003] Perfluorooctanoic acid (PFOA) is an artificially produced perfluorocarboxylic acid that is manufactured and used globally as an industrial surfactant. This product is considered an emerging health concern and is the subject of regulatory action and voluntary industrial phase-out.

[0004] Perfluorooctane sulfonic acid (PFOS) is an anthropogenic fluorinated surfactant and a global pollutant. PFOS is a key ingredient in many antifouling agents. PFOS is a toxic anthropogenic chemical that has been produced and gradually released into the environment over the past seventy years. According to a 2007 report by Lau et al., trace concentrations of PFOS in aquatic media can pose significant risks to living organisms, including immunotoxicity, hepatotoxicity, nephrotoxicity, and carcinogenicity, as well as developmental and reproductive effects. (Lau, C. Anitole, K. Hodes, C., Lai, D., Pfahles-Hutchens, A., Seed, J., 2007. Perfluoroalkyl acids: a review of monitoring and toxicological results. Toxicol, Sci., 99, 366-394).

[0005] Aqueous film-forming foam (AFFF) is a fire extinguishing agent used to extinguish fires involving flammable liquids, such as fuel fires. AFFF is commonly used in fire suppression systems on ships and shore facilities, fire trucks, and fire training facilities. Many AFFF formulations contain PFAS as well as larger and smaller C8 carbon chain derivatives; therefore, AFFF is considered a serious contaminant in the same way as PFAS and PFOS.

[0006] Due to the extreme stability of PFAS compounds, they are referred to as "permanent chemicals." Given the toxicity and longevity of these compounds, there is an urgent need to develop methods and products for removing PFAS from contaminated soil, bedrock, groundwater, and impermeable surfaces near human habitats, food sources, and living spaces.

[0007] In what is claimed to be the “first study” to evaluate the ability of in-situ flushing technology to remediate PFOS-contaminated soil and groundwater, the authors demonstrated that 98% of PFOS could be removed by flushing a soil bed with a 50% ethanol solution in 5 bed volumes. The report is entitled: (In-situ Soil Flushing for Remediation of PFOS-Contaminated Confined Soils – An Innovative Solution for Emerging Environmental Problems, by STMLD Envirathna, Reza Mahinroosta, Miao Li, and Karthika Krishna Pillai, Charles Sturt University, Bathurst, Australia. This report was published in Chemosphere, Volume 262, January 2021, Reference 127606). This document is also referred to herein as the Australian Report.

[0008] The ethanol remediation efficiency described in the aforementioned report is excellent. However, for example, using a 50% ethanol solution to remediate a large site of nearly one acre or more in situ is financially impractical, poses fire hazards and occupational health problems, and would require transport as a hazardous material.

[0009] From another perspective, the relevance will be understood below: Ivey International Ltd (7 19122-27 Avenue, Surrey, British Columbia, Canada, V3Z 5T1) manufactures surfactants for in-situ decontamination of soil, bedrock, and groundwater contaminated with a variety of non-aqueous liquids (NAPL), spherical and adsorbent phase paint thinners, gasoline, diesel, kerosene, lubricants, Bunker C oil, and chlorinated dry cleaning chemicals. The company's products are best known under the trademarks Ivey-sol™ 103, Ivey-sol™ 106, Ivey-sol™ 106CI, and Ivey-sol™ 108.

[0010] Ivey-sol™ is a registered trademark. For convenience, the "trademark symbol™" is omitted below, and the registered attributes are indicated in bold.

[0011] The precursors of Ivey-sol 103, Ivey-sol 106, Ivey-sol 106CI, and Ivey-sol 108 are described in U.S. Patent 6,319,882, granted to George A. Ivey on November 20, 2001. These surfactants have been successfully used globally for over two decades. The four surfactants described above are part of the IVEY surfactant family, which can be tailored to different contaminants, conditions, and hydrogeological features. This family of IVEY surfactants is referred to herein as IVEY surfactants.

[0012] Driven by civic duty, curiosity, or business interests, Ivey International Ltd. has invested time and resources in researching and testing the possibility of developing a method or compound suitable for in-situ decontamination of PFAS in soil, bedrock, groundwater, and impermeable surfaces. Summary of the Invention

[0013] This invention provides a remediation surfactant formulation capable of removing PFAS from soil, bedrock, groundwater, and impermeable surfaces. The novel remediation surfactant contains a variant formulation of the IVEY surfactant. This variant formulation of the IVEY surfactant is referred to herein as the novel Ivey mixture. The novel PFAS remediation surfactant is prepared by mixing a small amount of ethanol with the Ivey mixture in an aqueous solution. In use, the Ivey mixture is diluted to 4% in the remediation solution, wherein the ethanol content is 0.20% by volume. The name of the novel PFAS remediation solution is registered as the trademark PFAS-SOL™.

[0014] PFAS-SOL™ is also a registered trademark. For convenience, the "trademark symbol™" is omitted below, and the registered attribute is indicated in bold.

[0015] Ivey mixture formulations are made from a mixture of molecules with affinity for both water and PFAS contaminants. Each molecule is represented as follows: 2C+5CH3+CH2+O[2CH2+O]n + H, where [2CH2+O] is the hydrophilic head end of the molecule and 2C+5CH3+CH2+O is the hydrophobic tail end. The hydrophilic head end can be repeated "n" times via polymerization. There are two forms of repetition: [2CH2+O] and [CH2+O], and the presence of one form or the other occurs randomly. The molecules in Ivey mixtures are characterized by their solubility in water and their selective interactions between water and PFAS molecules.

[0016] When the hydrophilic head of an Ivey mixture molecule is repeated one to four times, the molecule is insoluble in water and has the ability to carry water into PFAS contaminants. When the hydrophilic head is repeated more than four times, the molecule is soluble in water and has the ability to carry PFAS contaminants into water. In preparing Ivey mixtures, water-soluble molecules are first mixed into an aqueous solution, and then the originally insoluble molecules are added to form the final composite mixture.

[0017] Ivey mixtures contain molecules of varying lengths to provide a dual effect against PFAS contaminants. Ivey mixture formulations may also contain other surfactants.

[0018] PFAS-SOL formulations are non-toxic, non-corrosive, non-caustic, biodegradable, and pH neutral. Based on a nonionic formulation, it incorporates a novel additive that selectively desorbs contaminants and makes the adsorbed spherical, non-aqueous liquid phase (NAPL) soluble in the aqueous phase. This means it forms a non-emulsifying mixture with water, thus allowing for easier control and removal from affected soil, bedrock, groundwater, and surface water while maintaining plume control.

[0019] Based on this modulated structure, these surfactants offer a variety of properties that enhance the effectiveness of most remediation strategies, primarily by overcoming limitations associated with contaminant adsorption and low solubility. Furthermore, they reduce the relative surface tension of water and overcome interfacial tension, thereby improving their wettability and associated hydraulic properties across a wider range of soil textures.

[0020] PFAS-SOL can selectively remove PFAS from adsorbed soil and bedrock surfaces, spheres, and / or NAPL phase strata, making it easier to use for enhanced physical, biological, and / or chemical remediation.

[0021] PFAS-SOL makes PFAS pollutants more miscible in water and improves various treatment-related combination reactions, decomposition reactions, single displacement reactions, and double displacement reactions associated with PFAS.

[0022] PFAS-SOL has been used in a four-flush process on a column of contaminated building soil containing 10% by weight activated carbon. The novel PFAS-SOL surfactant increased the concentration of PFAS in the wastewater by up to 622%, removing 99.979% of the PFAS from the column soil. The column test will be described in more detail on page 8 below.

[0023] This result is favorable compared to the experiments published in the Australian report, which showed that a five-rinse process using a 50% ethanol solution removed 98% of PFAS.

[0024] In another feature of this invention, the PFAS-SOL surfactant improves soil drainage. This novel surfactant reduces the interfacial surface tension of water from 73 dynes to less than 30 dynes. The novel PFAS-SOL surfactant also reduces the interfacial surface tension of PFAS to 30 dynes or lower.

[0025] This reduction in interfacial surface tension decreases capillary forces, increases the air and liquid permeability of the soil and bedrock, and enhances soil drainage. The shared interfacial surface tension of these two elements reduces the risk of one or the other losing this intimate control over other attractive surfaces as water and contaminants move "hand in hand" through the dense soil matrix channels during remediation.

[0026] Furthermore, in experiments using the PFAS-SOL surfactant, water molecule aggregation was significantly reduced. The PFAS-SOL surfactant breaks down larger (normal) water clusters into smaller clusters of fewer molecules. These smaller water clusters, with lower interfacial surface tension and less physical hindrance, allow the remediation solution to easily penetrate and pass through fine-grained soil. The remediation solution can easily flow into and out of pores, cracks, fissures, and voids in the soil structure, thus more comprehensively remediating soil, bedrock, groundwater, and impermeable surfaces.

[0027] In other aspects of this invention, ethanol production is both economical and environmentally friendly. The novel Ivey mixture is also made from biodegradable elements and is therefore environmentally friendly. When used in a PFAS-SOL solution, organic hydrocarbon pollutants present in PFAS-contaminated soil are also removed due to the Ivey mixture components of the solution. It should also be understood that the PFAS remediation capacity of the ethanol-novel Ivey mixture combination is higher than that of the individual components. Attached Figure Description

[0028] The accompanying figures are used to explain the structure of the PFAS-SOL surfactant and some of its properties.

[0029] Figure 1 It is an approximate representation of the PFAS molecule, showing its polarity;

[0030] Figure 2 It is an approximate representation of the molecules and polarity of the novel Ivey mixture;

[0031] Figure 3 It represents the ethanol molecule and its polarity;

[0032] Figure 4 It represents water molecules and their polarity;

[0033] Figure 5 This represents the potential tandem coordination and localization of novel Ivey mixtures and ethanol molecules in the repair solution, employing an enhanced and integrated raft arrangement of encapsulated PFAS molecules and water molecules. Detailed Implementation

[0034] The composition of PFAS-SOL surfactant is best explained as follows: PFAS-SOL surfactant is prepared from a novel Ivey mixture, water, and ethanol in the following proportions:

[0035] A batch of the novel Ivey mixture is sold as a 10% aqueous solution. A typical batch of the novel Ivey mixture contains 1000 liters; for example, 95 liters of the novel Ivey mixture in 855 liters of water. 50 liters of ethanol are added to this batch of the novel Ivey mixture to convert the batch into a PFAS-SOL concentrate. Therefore, the ethanol content in the PFAS-SOL concentrate is 50 liters / 1000 liters, or 5.00% by volume.

[0036] In stain removal applications, the PFAS-SOL concentrate is diluted to 4% in an aqueous remediation solution. Therefore, the ethanol content in the remediation solution is 4% = 0.20% by volume (5.00%). Column test

[0037] This diluted PFAS-SOL solution was tested in column tests at the University of Greenwich, UK, by Dr. Cecilia MacLeod in collaboration with Dr. David Holmes and George Ivey of Ivey International Ltd. The results of these tests are known as the Greenwich test.

[0038] The tests were conducted in soil columns made of building soil and 10% by mass powdered activated carbon (providing adsorbent organic matter content). The columns were slowly filled with water from the bottom and then drained to a set volume. 250 mg of PFOA and 250 mg of PFOS were added to each column to simulate a PFAS source zone, then the column was emptied and filled with effluent, and samples were taken to show the recovery of contaminants in the water. For comparison, tests were performed using a 50% methanol-water solution and a 4% PFAS-SOL solution. The column was then emptied, and an increase in the concentration of PFAS-SOL in the effluent indicated a significant increase in PFAS concentration. The column was then slowly disassembled to allow for moisture distribution, and soil samples were obtained to measure the retained PFAS.

[0039] The results showed that PFAS were significantly removed after rinsing with PFAS-SOL. Rinsing with water alone resulted in a PFAS recovery of approximately 5 μg / L, while rinsing with PFAS-SOL surfactant showed an improved recovery of up to 30.45 μg / L. This translates to an average PFAS removal increase of 240%, with a peak concentration of 622%. PFOA recovery averaged 160%, with a best result of 185%. PFOS recovery averaged 297%, with a best result of 732%. Total PFAS recovery averaged 242%, with a best result of 622%.

[0040] It was also found that PFAS-SOL solution increased drainage (reduction of soil retention) by 15% compared to methanol solution. Compared to water alone, PFAS-SOL solution increased column drainage time (reduction of capillary effect) by over 200%. PFAS-SOL solution alone required 5 minutes of drainage, while the same volume of methanol or water required 20 minutes. Similarly, PFAS-SOL solution significantly reduced the time for soil to reach saturation; from 20 minutes to 5 minutes.

[0041] Table 1 below summarizes the available data from the Greenwich test and the Australian report.

[0042] Referring to the attached diagram, as is best understood, Figure 1 , 3 4 and 4 represent PFAS, ethanol, and water molecules, respectively.

[0043] As is best understood, Figure 2 This is a representation of a novel Ivey mixture molecule. The right end (head) of the molecule can be expanded "n" times to customize the molecule according to working conditions, such as the specific contaminant to be removed, soil type, temperature, humidity, solubility, solubility of the contaminant, or depth of contamination. In a preferred analogy, the left side (tail) of the molecule is a horse-drawn sled, and the right side (head) is the extendable lever of that sled, which can be maneuvered with as many horses as needed. The Ivey mixture can adjust the number of horses (n) on the sled to improve the solubility (adjusting hydrophilicity) of molecules ranging from small to medium to large molecular sizes and masses.

[0044] The hydrophilic head in Ivey mixture molecules can extend from 1 to 30+. When (n) equals 1 to 4, the molecule is insoluble in water and has the ability to carry water into the contaminant. When (n) is 5 to 30 or greater, the molecule is soluble and has the ability to carry contaminants into the water. When both forms are present in PFAS-SOL, a unique dual capability is acquired. Such modified PFAS-SOL can clean contaminants by simultaneously drawing water into the contaminant PFAS phase and drawing the contaminant PFAS phase into the water, separating the phase into a floating or settling layer, spheres, or an absorbent or adsorbed phase of the contaminant.

[0045] When processing small pollutant molecules with low adsorption and aggregation capacity, (n) is preferably between 1 and about 10 or larger. When processing medium-sized molecules with moderate adsorption and aggregation capacity, (n) is preferably between about 10 or smaller and about 20 or larger. Similarly, when processing large pollutant molecules with relatively large adsorption and aggregation capacity, (n) is preferably between about 20 or smaller and about 30 or larger.

[0046] As previously mentioned, the extendable heads of Ivey mixture molecules have an alternating random form, which does not affect the properties of the solution.

[0047] refer to Figure 5 The diagram shown attempts to depict the mechanical binding of the PFAS-SOL surfactant to PFAS molecules. Although mentioned above, the exact repair process remains unclear, and the connections shown in this diagram cannot explain the remarkable results obtained from the addition of small amounts of ethanol to the novel Ivey mixture. The diagram frankly attempts to explain the affinity that forms the bonds between each molecule.

[0048] It should be understood that Figure 5 The illustration is a two-dimensional representation. The actual physical arrangement is a three-dimensional cylindrical and / or spherical array, in which several novel Ivy mixture-ethanol molecules are attached to several parts of the PFAS molecule, along and around the PFAS molecule, while numerous water molecules bind clusters of different sizes to the novel Ivy mixture-ethanol molecules to provide intramolecular traction for extracting, levitizing, and transporting the PFAS molecules.

[0049] In summary, compared with water rinsing alone, PFAS-SOL used in a 4% aqueous solution containing as little as 0.20% by volume ethanol achieved a significant improvement in drainage rate and PFAS desorption was increased by up to 622%.

[0050] The comparison of ethanol content in the remediation solutions described in the Australian report and the Greenwich test is 250:1. Given this difference, it is clear that PFAS-SOL's remediation performance... This is not only due to the ethanol element in the solution, but also to the synergistic effect of the three components. AFFF stain remover

[0051] PFAS-SOL has also demonstrated excellent performance in remediating AFFF (Acid-Free Filter) in pumps, pipelines, valves, instruments, probes, and tanks of AFFF storage units in oil and gas facilities. The decontamination process is carried out in five cycles, as described below:

[0052] In the first cycle, a 5% (by volume) aqueous solution of PFAS-SOL and 95% filtered drinking water surfactant was prepared and heated to 40°C. This solution was recirculated within the pipeline system for approximately 1.5 hours. After recirculation, the waste liquid was discharged into an empty storage tank. Subsequently, the pipeline system was flushed with filtered drinking water heated to 40°C to remove any residual surfactant aqueous solution. The flushing product was also discharged into a storage tank.

[0053] The second cycle repeats the first cycle, but uses an aqueous solution of 4% (by volume) PFAS-SOL and 96% filtered drinking water. The third, fourth, and fifth cycles also repeat the first cycle, but use 3%, 2%, and 1% (by volume) PFAS-SOL, respectively.

[0054] Following AFFF flushing and drinking water rinsing, a total of 12 PFAS analytes with values ​​greater than and less than C8 were detected on the inner surface of the pipe. These are shown in Table 2 below.

[0055] High-speed, three-stage rinsing with heated purified water reduced the surface concentration of each detected analyte. The sum of the concentrations of the 12 PFAS analytes was reduced to 94.56976%. Subsequent decontamination with heated PFAS-SOL reduced 10 of the 12 PFAS analytes to undetectable levels. The PFAS-SOL decontamination process further reduced the sum of the detected PFAS analytes by 99.99998%.

[0056] The decontamination process employed was highly successful in reducing PFAS analytes detected on the inner surface of the pipe by seven orders of magnitude compared to AFFF rinsing followed by rinsing with drinking water alone.

[0057] In subsequent ex-situ soil washing of PFAS-affected soil, 200 g of soil was treated with 200 ml of PFAS-SOL solution for 1 minute, showing potential near-complete PFAS recovery.

[0058] It should be understood that although small amounts of ethanol have shown significant results in PFAS remediation solutions, it is believed that other volumes of ethanol, other formulations of the novel Ivey mixture, and other straight-chain, branched-chain, or cyclic alcohol contents may also be effective as substitutes for ethanol.

[0059] Referring to Table 2, it should be understood that PFAS-SOL has some advantages in remediating the environment from PFAS contaminants, their precursors, derivatives, and residues from C4 to C12 variants (greater than and less than C8).

[0060] It should also be understood that the volume of ethanol used was too small to constitute a significant component of the repair solution. It is believed that the presence of ethanol in the Ivey mixture acts as a catalyst, stimulating or causing the Ivey mixture to exceed its expected repair capabilities.

[0061] The synergistic effect of the three components of PFAS-SOL may be partly explained by the specific characteristics of the Ivey mixture. As explained, the coexistence of soluble and insoluble molecules in the Ivey mixture, in synergy with other surfactants in the Ivey mixture, achieves a surprisingly innovative effect of making insoluble contaminants soluble. These two types of modifications to the Ivey mixture result in new mechanical mechanisms in which it can interact with adsorbed, spherical, large quantities of non-aqueous liquid (free phase) and vapor to remediate these contaminants on soil, bedrock, groundwater, and impermeable surfaces.

[0062] It is believed that Ivey's selective solubility or insolubility in its blend surfactants works well with ethanol to achieve the unique ability to extract and transport PFAS contaminants into the remediation solution.

[0063] refer to Figure 5 Ivey mixture molecules have a double-ended affinity for both PFOS and water molecules. Ethanol molecules have an affinity for both PFOS and water molecules, which helps to extract PFOS molecules from their environment, regardless of their potential affinity for Ivey mixture molecules.

[0064] Table 1 50% methanol solution, rinse 5 times PFAS reduction 99.965% 50% ethanol solution, rinse 5 times PFAS reduction 98% PFAS-SOL 4% solution, 5 rinses PFAS reduction 99.979%

[0065] Table 2 Detected PFAS analytes Chemical formula reduce Perfluorobutyric acid (PFBA) C4F7CO2H 99.96055% Perfluorovalerate (PFPeA) C5HF9O2 99.99369% Perfluorohexanoic acid (PFHxA) C6HF11O2 99.99956% Perfluoroheptanoic acid (PFHpA) C7HF13O2 99.99201% Perfluorooctanoic acid (PFOA) C8HF15O2 99.99876% Perfluorononanoic acid (PFNA) C9HF17O2 99.99278% Perfluorodecanoic acid (PFDA) C10HF19O2 99.99650% Perfluoroundecanoic acid (PFUnDA) C11HF21O2 99.96291% Perfluorododecanoic acid (PFDoA) C12HF23O2 99.98844% Perfluorooctane sulfonic acid (PFOS) C8HF17O3S N / C 6:2 fluoropolymer sulfonic acid (6:2 FTS) C8H5F13O3S 99.99998% 8:2 fluoropolymer sulfonic acid (8:2 FTS) C10H5F17O3S 99.99999% Industrial applicability

[0066] Based on the findings described herein and the experiments conducted to date, it is believed that the novel PFAS-SOL product can be used to remove PFAS and PFOS in concentrations less than C4 and greater than C6. 12 The carbon content form of its derivatives is used in soil, bedrock, groundwater, and impermeable surfaces. It is also believed that the novel PFAS-SOL surfactant can be used for decontamination of hard and soft surfaces in environmental monitoring equipment, pumping units, tanks, pumps, valves and pipes, clothing, Gore-Tex™, interior decoration, carpets, electronic instruments, and medical devices and related anthropogenic environments. Furthermore, the novel PFAS-SOL product is believed to be ideal for in-situ decontamination processes using vertical well push-pull, sweep, deep well arrays, and / or horizontal wells. The novel PFAS-SOL is also suitable for batch or continuous ex-situ soil cleaning and decontamination processes. Due to its environmental friendliness, PFAS-SOL can also be used for in-situ or ex-situ aerobic or anaerobic bioremediation of PFAS, in-situ or ex-situ chemical oxidation or chemical reduction processes, or, for example, for cleaning PFAS spills along coastlines or forest floors. Moreover, as shown in this article, PFAS-SOL is a good alternative to incinerating waste granular activated carbon or granular absorbent substrates for PFAS in all industrial sectors.

Claims

1. A molecule with affinity for water and PFAS contaminants, used for the remediation of soil, bedrock, groundwater, and impermeable surfaces contaminated with PFAS contaminants, characterized in that, The molecule has the form 2C+5CH3+CH2+O[2CH2+O]n+H, wherein [2CH2+O] is the hydrophilic head end of the molecule, and 2C+5CH3+CH2+O is the hydrophobic tail end of the molecule, and the hydrophilic head end can be repeated n times.

2. The molecule according to claim 1, wherein, The repeating units at the hydrophilic head end have an alternating random form of [CH2+O].

3. The molecule according to claim 2, wherein, The molecule has selective solubility in water depending on the length of its hydrophilic head.

4. The molecule according to claim 3, wherein, The hydrophilic head is repeated one to four times, and the molecule is insoluble in water and has the ability to carry water into PFAS contaminants.

5. The molecule according to claim 2, wherein, The hydrophilic head is repeated more than four times, and the molecule is water-soluble and has the ability to carry PFAS contaminants into the water.

6. The molecule according to claim 5, wherein, The head end can be repeated more than 30 times to correspondingly enhance the ability to carry PFAS contaminants into the water.

7. A remediation solution for remediating soil, bedrock, groundwater, and impermeable surfaces contaminated with PFAS pollutants, characterized in that, The solution comprises a mixture of molecules in an aqueous solution and a reagent, each molecule having the form 2C+5CH3+CH2+O[2CH2+O]n+H.

8. The repair solution according to claim 7, wherein, [2CH2+O] is the head end of each of the molecules, and 2C+5CH3+CH2+O is the tail end of each of the molecules, and the head end can be repeated n times.

9. The repair solution according to claim 8, wherein, The repeating unit at the head end has an alternating random form of [CH2+O].

10. The repair solution according to claim 7, wherein, The reagent is an alcohol.

11. The repair solution according to claim 7, wherein, The reagent is ethanol.

12. The repair solution according to claim 8, wherein, The molecular mixture consists of molecules with different head-end lengths.

13. The repair solution according to claim 11, wherein, The remediation solution has an affinity for PFAS contaminants and their C4-C12 variants.

14. The repair solution according to claim 7, wherein, Each of the molecules exhibits selective solubility in water based on the length of its respective head end.

15. The repair solution according to claim 13, wherein, When the head end of one of the molecules is repeated less than five times, the molecule is insoluble in water and has the ability to carry water into PFAS contaminants.

16. The repair solution according to claim 13, wherein, When the head end of one of the molecules is repeated more than five times, the molecule dissolves in water and has the ability to carry PFAS contaminants into the water.

17. The repair solution according to claim 15, wherein, Each of the molecules can be repeated more than 30 times at its head end to enhance the molecule’s ability to carry PFAS contaminants into the water.

18. The repair solution according to claim 7, wherein, The remediation solution is non-toxic, non-corrosive, caustic, biodegradable, and pH neutral.

19. The repair solution according to claim 10, wherein, The aqueous solution contains 10% of the molecular mixture.

20. The repair solution according to claim 18, wherein, The ethanol content therein is 0.20% by volume.

21. A method for remediating an environment contaminated by PFAS pollutants, wherein, The contaminated environment is selected from soil, bedrock, groundwater, and impermeable surfaces, and the PFAS contaminant comprises at least one contaminant selected from the group consisting of PFAS contaminants, precursors, derivatives, and residues from C4 to C12 variants of the PFAS contaminant. The method is characterized by the following steps: rinsing the contaminated environment with a remediation solution made of an aqueous solution containing 4% of a mixture of molecules of different lengths and 0.20% by volume of ethanol as a reagent, each molecule having the form 2C+5CH3+CH2+O[2CH2+O]n+H.

22. The method according to claim 21, wherein, The step of flushing the contaminated environment is carried out in situ within a remediation process, which includes vertical well push-pull, sweeping, deep well multi-layer array, and horizontal well decontamination.

23. The method according to claim 21, wherein, The step of flushing the contaminated environment is carried out off-site in a process belonging to the remediation process, which includes intermittent process, continuous soil washing process, aerobic bioremediation, anaerobic bioremediation, chemical oxidation and chemical reduction process.

24. The method according to claim 21, wherein, The step of flushing the contaminated environment is carried out in any remediation process known as aerobic, anaerobic, bioremediation, chemical oxidation, chemical reduction, and electrodynamic remediation.

25. The method according to claim 21, wherein, The contaminated environment refers to fabric products within the fabric products group, which includes clothing, Gore-Tex™, interior decorations, and carpets.

26. The method according to claim 21, wherein, The contaminated environment is a hard surface product within the hard surface product group, which includes pumps, valves, tanks, pipes, and probes.

27. The method according to claim 21, wherein, The contaminated environment is complex hard surface products in the complex hard surface product group, which includes electronic devices and medical devices.

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