Method for degrading organic wastewater through excitation of peroxysulphate under effect offerrous molybdate

A technology for activating persulfate and organic wastewater, applied in chemical instruments and methods, special compound water treatment, oxidized water/sewage treatment, etc. Application prospect and cost reduction effect

Inactive Publication Date: 2016-08-31
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The main technical problem to be solved is: the use of water-soluble transition metal ions as catalysts in the prior art is likely to cause secondary pollution and is difficult to reuse

Method used

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  • Method for degrading organic wastewater through excitation of peroxysulphate under effect offerrous molybdate
  • Method for degrading organic wastewater through excitation of peroxysulphate under effect offerrous molybdate
  • Method for degrading organic wastewater through excitation of peroxysulphate under effect offerrous molybdate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1) Add sodium persulfate to 100mg / L orange G dye waste water to obtain a waste water solution, and adjust the pH value of the waste water solution to 3.0 with sulfuric acid;

[0038] 2) add ferrous molybdate in waste water solution again, the concentration of sodium persulfate in waste water solution is 1400mg / L, and the concentration of ferrous molybdate in waste water solution is 200mg / L;

[0039] 3) Put the waste water solution after adding the ferrous molybdate into the constant temperature shaking table and stir, and react at normal temperature, and the decolorization rate of the dye is 94.6% after 30 minutes.

[0040] Comparative experiment 1: only sodium persulfate was added to the dye wastewater, the pH of the wastewater solution was adjusted to 3.0, and the decolorization rate was only 2.0% after the same time.

[0041] Comparative experiment 2: only ferrous molybdate was added to the dye wastewater, the pH of the wastewater solution was adjusted to 3.0, and th...

Embodiment 2

[0043] 1) Add sodium persulfate to 20mg / L orange G dye waste water to obtain a waste water solution, and adjust the pH value of the waste water solution to 3.0 with sulfuric acid;

[0044] 2) add ferrous molybdate in waste water solution again, the concentration of sodium persulfate in waste water solution is 1000mg / L, and the concentration of ferrous molybdate in waste water solution is 200mg / L;

[0045] 3) Put the waste water solution after adding ferrous molybdate into a constant temperature shaker and stir, and react at normal temperature, and the decolorization rate of the dye is 96% after 30 minutes.

Embodiment 3

[0047] 1) Add sodium persulfate to 20mg / L orange G dye waste water to obtain a waste water solution, and adjust the pH value of the waste water solution to 1.5 with sulfuric acid;

[0048]2) add ferrous molybdate in waste water solution again, the concentration of sodium persulfate in waste water solution is 1000mg / L, and the concentration of ferrous molybdate in waste water solution is 200mg / L;

[0049] 3) Put the waste water solution after adding the ferrous molybdate into the constant temperature shaking table and stir, and react at normal temperature, and the decolorization rate of the dye is 95% after 15 minutes.

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Abstract

The invention discloses a method for degrading organic wastewater through excitation of peroxysulphate under the effect of ferrous molybdate. The method comprises the steps that peroxysulphate and ferrous molybdate are added into a wastewater solution, stirring is performed to enable the peroxysulphate and the ferrous molybdate to be subjected to a reaction, the peroxysulphate generates sulfate radicals and hydroxyl radicals with the strong oxidizing property under the effect of the ferrous molybdate, the sulfate radicals and the hydroxyl radicals further oxidize persistent organic pollutants in organic wastewater, and therefore the purpose of degrading the organic wastewater is achieved. The added ferrous molybdate continuously and efficiently catalyzes and activates the peroxysulphate under the normal temperature so as to degrade the organic wastewater and can be recycled after the reaction, the processing efficiency under the normal temperature is high, operation is easy, and the great application prospect is achieved in the field of persistent organic wastewater treatment.

Description

technical field [0001] The invention belongs to the technical field of water pollution control, and in particular relates to a method for activating ferrous molybdate to degrade organic waste water with persulfate. Background technique [0002] Advanced oxidation technology has attracted extensive attention from scholars at home and abroad because of its high efficiency in degrading organic pollutants. Traditional advanced oxidation technology mainly utilizes strong oxidizing free radicals such as hydroxyl radicals ( OH ) and hydroperoxides generated during the reaction process. base (·OOH), etc., degrade organic pollutants into small molecular substances, and finally mineralize them into CO 2 、H 2 O and the corresponding inorganic ions. [0003] Sulfate radical (SO4 — ) has an oxidation-reduction potential of 2.6V, which is slightly lower than that of OH (2.7V), but compared to OH, SO4 — It is relatively stable under acidic and neutral conditions, and can also oxidize H...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72
CPCC02F1/725C02F2305/023
Inventor 马邕文林学明万金泉王艳
Owner SOUTH CHINA UNIV OF TECH
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