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Method for in-situ remediation of PFOS pollutants in underground water

An in-situ remediation and groundwater technology, applied in the field of water pollution remediation, can solve the problems of high treatment cost, long cultivation time, harsh operating conditions, etc., and achieve excellent removal rate, simple operation, and environmental friendliness

Active Publication Date: 2021-11-09
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, physicochemical adsorption exchange and membrane separation are only the transfer of PFOS between different phases, and have not fundamentally solved the pollution problem; although advanced redox can effectively remove PFOS, the common problems are harsh operating conditions, high treatment costs, and vulnerable treatment effects. Environmental factors and the influence of coexisting substances in natural water bodies and other shortcomings; biodegradation is an environmentally friendly pollution control technology, but from the few published papers, the degradation and defluorination of PFOS can only be performed in certain specific strains of pure breeding It is realized in the culture system, and there are bottleneck problems such as harsh culture conditions, long culture time and incomplete mineralization, which limit its practical application; although transition metal coenzyme biomimetic catalytic degradation is a PFOS removal technology with in situ repair application prospects , but there are disadvantages that the transition metal coenzymes are expensive and the degradation process tends to generate more toxic long-chain degradation products

Method used

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  • Method for in-situ remediation of PFOS pollutants in underground water
  • Method for in-situ remediation of PFOS pollutants in underground water

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Take four 20mL headspace vials, and wrap the outer wall of each headspace vial with a layer of aluminum foil to avoid light. ) in proportion to the volume of PFOS solution, Propionibacterium sescheri and anaerobic water adjusted to pH 7, the total volume of the mixture is 15mL, the concentration of PFOS in the mixture is 200μmol / L, and then weigh 0.1g capsules nZn with a diameter of 40-60nm 0 Add the powder into each headspace bottle sample, then tighten the bottle cap of the headspace bottle and shake it gently, and finally transfer them to a water bath at 75°C for anaerobic reaction. Take destructive samples and test the defluorination rate of PFOS after 1 day, 3 days, 5 days and 7 days respectively.

[0034] Among them, the outer wall of the headspace bottle is covered with a layer of aluminum foil to avoid light, the purpose is to avoid the generated VB 12 See photodecomposition. The "Propionibacterium sherbei" added to the system is actually the culture solution...

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Abstract

The invention provides a method for in-situ remediation of PFOS pollutants in underground water. The method comprises the following steps: adding transition metal-producing coenzyme bacteria and nano zero-valent metal into the underground water polluted by PFOS for reaction so as to restore the PFOS pollutants in the water. The effect of the method is obviously superior to the effect of repairing PFOS polluted water by singly using transition metal coenzyme producing bacteria or nano zero-valent metal. Moreover, the remediation method provided by the invention has the characteristics of in-situ remediation, low cost, simplicity in operation, environmental friendliness and the like, does not generate secondary pollution, has an excellent PFOS removal rate effect, and is suitable for large-scale remediation of the underground water body polluted by PFOS.

Description

technical field [0001] The invention relates to the technical field of water pollution remediation, in particular to a method for in-situ remediation of PFOS pollutants in groundwater. Background technique [0002] In view of the environmental persistence, bioaccumulation and biotoxicity of perfluorooctanesulfonyl compounds (PFOS), the United Nations Program added it to Appendix B of the Stockholm Convention in 2009, and my country also listed PFOS in 2007. List of Priority Control Chemicals. Due to the strict restrictions on PFOS in developed countries and regions, my country has rapidly become a major country in the production and use of PFOS, resulting in increasingly serious PFOS pollution in groundwater and other water sources. Therefore, it is urgent to develop an economical, effective and environmentally friendly PFOS harmless technology to reduce Ecological pollution levels and human health risks. [0003] At present, the technologies for removing PFOS in the aqueous...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/14C02F101/34C02F101/36C02F101/38C02F103/06
CPCC02F3/34C02F3/28C02F1/705C02F2101/40C02F2101/36C02F2101/38C02F2101/34C02F2103/06C02F2101/14
Inventor 李飞何健章佳琦苑宝玲周真明刘淑坡曾庆玲
Owner HUAQIAO UNIVERSITY
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