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A method of doping fe(oh) with metal ions 2 Method for Removing Halogenated Organic Pollutants in Water

A technology of organic pollutants and metal ions, applied in the direction of water pollutants, contaminated groundwater/leachate treatment, chemical instruments and methods, etc., can solve the problems of high cost and stability to be improved, and achieve cost saving and reduction The risk of secondary pollution, the effect of easy realization

Active Publication Date: 2021-10-22
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the cost of the supported catalyst method is high, and its stability needs to be improved

Method used

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  • A method of doping fe(oh) with metal ions <sub>2</sub> Method for Removing Halogenated Organic Pollutants in Water

Examples

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Embodiment 1

[0041] In this embodiment, a Ni 2+ Doped with Fe(OH) 2 The method for removing HOCs in water bodies is to treat water polluted with trichlorethylene, and the concentration of trichlorethylene is 20 μM, comprising the following steps:

[0042] Preparation of Fe in an anaerobic glove box 2+ solution and lye (NaOH), and Fe 2+ The solution is slowly added dropwise to the lye, and after the dropwise addition is completed, the Fe(OH) 2 Reserve solution for one day, reserve, the concentration of Fe(II) in the reserve solution is not lower than 450 mM, pH > 13;

[0043] Preparation of Ni in an anaerobic glove box 2+ Solution, when the concentration of the metal ion solution is 100 mM, set aside;

[0044] A 10 mL transparent glass bottle was used as the reaction system (the working system was 5 mL), and 0.5 mL Fe(OH) was added to the reaction system 2 stock solution, then add 0.5 mL Ni 2+ Shake the solution for 30 seconds, add anaerobic water to make it to 5 mL, adjust the pH to...

Embodiment 2

[0047] This embodiment is basically the same as Embodiment 1, especially in that:

[0048] In this example, a Co 2+ Doped with Fe(OH) 2 The method for removing water body HOCs is to treat water containing carbon tetrachloride pollution, and the concentration of carbon tetrachloride is 20 μM, comprising the following steps:

[0049] Preparation of Fe in an anaerobic glove box 2+ solution and lye (NaOH), and Fe 2+ The solution is slowly added dropwise to the lye, and after the dropwise addition is completed, the Fe(OH) 2 Reserve solution for one day, reserve, the concentration of Fe(II) in the reserve solution is not lower than 450 mM, pH > 13;

[0050] Preparation of Co in an anaerobic glove box 2+ Solution, when the concentration of the metal ion solution is 100 mM, set aside;

[0051] A 10 mL transparent glass bottle was used as the reaction system (the working system was 5 mL), and 0.5 mL Fe(OH) was added to the reaction system 2 stock solution, then add 0.5 mLCo 2+ ...

Embodiment 3

[0054] This embodiment is basically the same as the previous embodiment, and the special features are:

[0055] In this example, a Pd 2+ Doped with Fe(OH) 2 The method for removing HOCs in water bodies is to treat water polluted with trichlorethylene, and the concentration of trichlorethylene is 20 μM, comprising the following steps:

[0056] Preparation of Fe in an anaerobic glove box 2+ solution and lye (NaOH), and Fe 2+ The solution is slowly added dropwise to the lye, and after the dropwise addition is completed, the Fe(OH) 2 Reserve solution for one day, reserve, the concentration of Fe(II) in the reserve solution is not lower than 450 mM, pH > 13;

[0057] Preparation of Pd in ​​an anaerobic glove box 2+ Solution, when the concentration of the metal ion solution is 100 mM, set aside;

[0058] A 10 mL transparent glass bottle was used as the reaction system (the working system was 5 mL), and 0.5 mL Fe(OH) was added to the reaction system 2 stock solution, then add ...

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Abstract

The invention discloses a metal ion doping Fe(OH) 2 The method for removing halogenated organic pollutants in water is to first configure Fe in an oxygen-free environment 2+ solution and lye, and the Fe 2+ The solution was slowly added dropwise to the lye, and after the addition was completed, it was left to stand to obtain Fe(OH) 2 The stock solution is for standby; then the divalent transition metal ion solution is configured in an oxygen-free environment for standby; then in an oxygen-free environment, Fe(OH) is added to the reaction vessel in turn 2 The stock solution and the divalent transition metal ion solution are neutralized by using hydrochloric acid to adjust the pH in the reaction vessel to obtain a decontamination solution; finally, the aqueous solution containing halogenated organic pollutants is added to the decontamination solution and shaken and mixed to carry out the decontamination reaction, that is, It can complete the removal of halogenated organic pollutants in water. The present invention utilizes Fe(OH) 2 The metal ions form a reduction system, which can completely dehalogenate HOCs in a short time, and has high-efficiency removal capability; the method of the invention is simple and convenient, easy to implement, and cost-saving.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and relates to a method for removing halogenated organic pollutants in water, in particular to a method for doping Fe(OH) with metal ions 2 A method for removing halogenated organic pollutants in water, especially using a variety of metal ions doped with ferrous hydroxide (Fe(OH) 2 ) is a method for removing halogenated organic pollutants in water, which is an in-situ chemical reduction restoration technology for groundwater. Background technique [0002] Halogenated organic compounds are an important class of organic compounds, which are widely used in modern pesticides, medicine and other fields, resulting in a large amount of halogenated organic compounds being released into the environment. Halogenated organic substances have the characteristics of strong toxicity, stable structure, strong migration ability, and refractory biodegradation. They are extremely harmful substances. Their existence...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/70C02F101/36C02F103/06
CPCC02F1/70C02F2101/36C02F2103/06
Inventor 黄理志邓佳张雪洁贾欠欠韩振理赵鹏程
Owner WUHAN UNIV
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