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Solubilizing material for underground environment PCE pollution remediation and preparation method thereof

A pollution remediation and environmental technology, applied in the field of environmental engineering, can solve the problems of limited solubilization ability of solubilizing materials, inability to apply PCE, pollution remediation, etc.

Active Publication Date: 2020-10-30
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a solubilizing material for the repair of PCE pollution in the underground environment, to overcome the shortcomings of the existing chlorinated hydrocarbon pollutant solubilizing materials that have limited solubilization ability and cannot be applied to the repair of PCE pollution in the underground low-temperature environment

Method used

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  • Solubilizing material for underground environment PCE pollution remediation and preparation method thereof
  • Solubilizing material for underground environment PCE pollution remediation and preparation method thereof
  • Solubilizing material for underground environment PCE pollution remediation and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Preparation of NSS-EO n -OH(n=7,10)

[0039] In a dry three-necked flask equipped with a reflux condenser, a constant pressure dropping funnel and a magnetic stirrer, dry nitrogen gas was introduced for 10 minutes; allyl polyether was added to the dry three-necked flask, and diluted with isopropanol after adding The chloroplatinic acid (Speier catalyst) or Karstedt platinum catalyst was used as the catalyst, and the temperature was raised to 80°C in an oil bath magnetic stirrer, and after activation for 30 minutes, the temperature was raised to 94°C; using a constant pressure funnel, gradually add 1,1, 1,3,5,5,5-Heptamethyltrisiloxane is subjected to hydrosilylation reaction, and the reaction time is 2-3 hours; 2% activated carbon is added to absorb and precipitate platinum catalyst after cooling, and the color is removed by suction filtration; Distilled off the solvent and low boilers (unreacted heptamethyltrisiloxane and allyl polyether) to obtain a colorless transpa...

Embodiment 2

[0041] Take the colorless and transparent oily liquid in Example 1, mix it with potassium bromide, grind and press it into a tablet, and do infrared spectrum measurement, wherein: trisiloxane polyoxyethylene ether 2250~2100cm -1 The stretching vibration absorption peak of Si-H disappears; 3392cm -1 -OH stretching vibration absorption peak at 2872cm -1 at -CH 2 The stretching vibration absorption peak of 1646cm -1 where -CH=CH 2 The absorption peak of stretching vibration, 1107cm -1 It is Si-O-Si vibration absorption peak, which proves the synthesis of trisiloxane polyoxyethylene ether. Compliant with NSS-EO n Structural features of -OH, such as figure 1 shown.

Embodiment 3

[0043] Take the product NSS-EO in Example 1 n -OH (n=7,10) configuration mass concentration is 0.05g / L, 0.1g / L, 0.2g / L, 0.3g / L, 0.4g / L, 0.5g / L, 1.0g / L, 2.0g / L, 3.0g / L, aqueous solution, measure the above NSS-EO n The surface tension of -OH (n=7,10) solution to obtain NSS-EO 7 The critical micelle concentration (CMC) of -OH is 0.5g / L (8.7×10 -4 mol / L), the surface tension is about 22mN / m, and NSS-EO is obtained 10 The critical micelle concentration (CMC) of -OH is 0.4g / L (5.5×10- 4 mol / L), the surface tension is about 17mN / m as figure 2 shown.

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Abstract

The invention relates to a solubilizing material for underground environment PCE pollution remediation and a preparation method thereof. According to the solubilizing material, a synthesized non-ionicpolyether modified trisiloxane surfactant is used as a main material; a mixed solution is prepared from the main material, isopropanol, sodium chloride and water in proportion; the mixed solution coats hydrophobic chlorohydrocarbon such as tetrachloroethylene by utilizing the ultralow interfacial tension of an interfacial membrane formed by the mixed solution to spontaneously form a stable microemulsion system with the tetrachloroethylene, and the increase of the apparent solubility of chlorohydrocarbon pollutants in water is realized. The trisiloxane surfactant is used for replacing a traditional hydrocarbon surfactant, and compared with a traditional hydrocarbon surfactant solution or a mixed compound solution of the traditional hydrocarbon surfactant solution, the mixed solution prepared from the trisiloxane surfactant, a cosurfactant, the salt and the water serves as the solubilizing material, so that the solubilizing amount is larger; the solubilizing material can be used for repairing chlorohydrocarbon pollution of underground water and soil, and is wide in application.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering, in particular to a high-efficiency solubilizing material for chlorinated hydrocarbon pollutants in an underground environment and a synthesis method thereof, in particular to a solubilizing material and a preparation method for remediating PCE pollution in the underground environment. Background technique [0002] At present, chlorinated hydrocarbons are widely used as dry cleaning agents, metal degreasing solvents, refrigerator refrigerants, etc. However, due to production, use, storage and improper disposal, chlorinated hydrocarbons will enter the environment through volatilization, leakage, wastewater discharge, pesticide use, etc., and become the main pollution sources of the atmosphere, soil and water bodies. Among them, Tetrachloroethylene (PCE) is a refractory organic chemical, colorless with fragrance, transparent, volatile, denser than water, with lower water solubility...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F17/54B01F17/38C07F7/08C09K17/40C09K23/54C09K23/38
CPCC07F7/0879C09K17/40C09K23/00C09K23/017
Inventor 董军蔡培垚莫言阳梁雪夏添姜迪瀚
Owner JILIN UNIV