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Method for removing halogenated organic pollutants in water by using metal ion doped Fe (OH) 2

A technology of organic pollutants and metal ions, which is 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 high efficiency The effect of removal ability and method is simple and convenient

Active Publication Date: 2021-02-05
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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  • Method for removing halogenated organic pollutants in water by using metal ion doped Fe (OH) 2

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 450mM, pH>13;

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

[0044] Use a 10mL transparent glass bottle as the reaction system (the working system is 5mL), add 0.5mL Fe(OH) to the reaction system first 2 stock solution, then add 0.5mL Ni 2+ Solution, shake for 30 seconds, add anaerobic water to make it to 5mL, adjust the pH to neutral with hydrochl...

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 carbon tetrachloride-containing polluted water, 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 450mM, pH>13;

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

[0051] Use a 10mL transparent glass bottle as the reaction system (the working system is 5mL), add 0.5mL Fe(OH) to the reaction system first 2 stock solution, then add 0.5mLCo 2+ solution, shaken fo...

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 450mM, pH>13;

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

[0058] Use a 10mL transparent glass bottle as the reaction system (the working system is 5mL), add 0.5mL Fe(OH) to the reaction system first 2 stock solution, then add 0.5mL LP d 2+ S...

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Abstract

The invention discloses a method for removing halogenated organic pollutants in water by using metal ion doped Fe (OH) 2, which comprises the following steps: preparing a Fe < 2 + > solution and an alkali solution in an oxygen-free environment, slowly dropwise adding the Fe < 2 + > solution into the alkali solution, and standing to obtain a Fe (OH) 2 stock solution for later use; then preparing adivalent transition metal ion solution in an oxygen-free environment for later use; sequentially adding the Fe (OH) 2 stock solution and the divalent transition metal ion solution into a reaction container in an oxygen-free environment, and regulating the pH value in the reaction container to be neutral by utilizing hydrochloric acid to obtain a decontamination solution; and finally, adding the aqueous solution containing the halogenated organic pollutants into the decontamination solution, oscillating and mixing, and carrying out decontamination reaction to finish removal of the halogenated organic pollutants in the water. According to the method, Fe (OH) 2 and metal ions are used for forming a reduction system, HOCs can be completely dehalogenated in a short time, and the efficient removal capacity is achieved; and the method is simple and convenient, convenient 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 Applications(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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