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Method for treating organic wastewater through catalytic activation of persulfate by utilizing iron oxychloride

A technology of ferric oxychloride and peroxodisulfate, which can be used in oxidation water/sewage treatment, chemical instruments and methods, special compound water treatment, etc. It can solve the problems of short life and achieve long life, stable performance and attenuation. The effect of time 4s

Active Publication Date: 2017-05-31
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Hydroxyl radicals can quickly and non-selectively degrade most organic pollutants, but they need to oxidize pollutants under acidic conditions, and have a short lifespan in aqueous solution (lifetime less than 1μs), and are affected by water matrix (carbonic acid salt, bicarbonate, natural organic matter, etc.)

Method used

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  • Method for treating organic wastewater through catalytic activation of persulfate by utilizing iron oxychloride
  • Method for treating organic wastewater through catalytic activation of persulfate by utilizing iron oxychloride
  • Method for treating organic wastewater through catalytic activation of persulfate by utilizing iron oxychloride

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preparation example Construction

[0038] The preparation method of the FeOCl catalyst includes a partial thermal decomposition method and a chemical vapor phase migration method. During the thermal decomposition process of the partial thermal decomposition method, the formation of oxychlorides and the formation of hydroxides, oxyhydroxides, etc. exist Competition, by precisely controlling the thermal decomposition temperature, atmosphere and heating rate of ferric chloride, etc., the decomposition, hydroxylation, phase transition, crystallization and other processes of the precursor salt can be controlled. FeOCl can be prepared using anhydrous ferric chloride as a precursor, and it is generally believed that the mechanism is hydrated FeCl 3 with anhydrous FeCl 3 The reaction, through the elimination of hydrogen chloride and structural rearrangement, finally forms FeOCl.

[0039] In a specific embodiment, anhydrous ferric chloride can be ground in an agate mortar for half an hour in an environment with an air ...

Embodiment 1

[0042] Such as figure 1 As shown, the embodiment of the present invention 1 utilizes oxyferric chloride to catalytically activate the method for treating organic waste water with peroxodisulfate, comprising the steps of:

[0043] Step S101: Add organic pollutant RhB solution, ultrapure water and catalyst FeOCl to the reaction vessel, and vibrate in a constant temperature water bath shaker for 30 minutes to obtain a mixture;

[0044] Step S102: adding sodium persulfate (PS) solution to the mixture, the sodium persulfate is catalyzed by oxyferric chloride to generate sulfate radicals to degrade organic wastewater;

[0045]The organic pollutant in the organic wastewater is Rhodamine B;

[0046] In order to obtain the effect of the method for utilizing peroxodisulfate to treat organic waste water in the embodiment of the present invention, the following series of experiments are carried out to prove that embodiment 1:

[0047] Experiment 1: The effect of the preparation temperat...

Embodiment 2

[0056] Such as figure 1 As shown, the embodiment of the present invention 2 utilizes oxyferric chloride to catalytically activate the method for treating organic waste water with peroxodisulfate, comprising the steps of:

[0057] Step S201: Add a solution containing organic pollutants, ultrapure water and catalyst FeOCl into the reaction vessel, and vibrate for a period of time in a constant temperature water bath shaker to obtain the mixture;

[0058] Step S202: Add potassium persulfate solution to the mixture, and the potassium persulfate is catalyzed and activated by oxyferric chloride to generate sulfate radicals to degrade organic wastewater;

[0059] The organic pollutant in the organic wastewater is methylene blue;

[0060] The initial concentration of organic pollutants is 50mg / L; the initial concentration of catalyst FeOCl is 250mg / L; the concentration of potassium persulfate (PS) solution is 50mg / L.

[0061] The initial pH of the organic wastewater was 12.

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Abstract

The invention provides a method for treating organic wastewater through catalytic activation of persulfate by utilizing iron oxychloride. The method comprises the following steps: adding iron oxychloride into organic wastewater, and carrying out an adsorption reaction so as to obtain a mixture; and adding persulfate into the mixture, wherein the persulfacte is subjected to catalytic activation by iron oxychloride so as to produce sulfate radicals for degrading the organic wastewater. According to the method disclosed by the invention, the persulfate serves as an oxidizing agent and is subjected to efficient catalytic activation so as to produce the sulfate radical SO4<.->; by utilizing the catalyst iron oxychloride, the sulfate radical has high redox ability and has long existing life in aqueous solution, the decay time is 4 seconds, and the stability of the oxidizing agent is high, so that a majority of organic pollutants can be completely degraded, and the performance of the iron oxychloride is stable. Meanwhile, the invention further provides a novel thought of treating pollutant effluents by persulfate.

Description

technical field [0001] The invention belongs to the field of waste water treatment, and in particular relates to a method for treating organic waste water by using oxyferric chloride to catalyze and activate peroxodisulfate. Background technique [0002] With the rapid development of the economy and the continuous progress of the society, the ecological environment on which human beings rely is increasingly seriously polluted and destroyed. A large number of toxic, harmful and refractory pollutants (such as dyes, pesticides, herbicides, antibiotics, preservatives, detergents, insecticides, disinfectants, etc.) enter the environmental system, causing serious pollution to water bodies. According to the China Environmental Quality Announcement issued by the national environmental protection department, 436 rivers have been polluted to varying degrees, accounting for 82% of the total surveyed. As of 2011, all major rivers in the country have been polluted to varying degrees, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72B01J27/128C02F101/30
CPCB01J27/128C02F1/725C02F2101/30C02F2305/02
Inventor 李东亚夏东升徐海明袁向娟曹刚孙磊陈梦蝶王琦
Owner WUHAN TEXTILE UNIV
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